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1

Research on tensile strength characteristics of bridge deck pavement bonding layers  

NASA Astrophysics Data System (ADS)

As the development of the traffic in the world, the bridge deck pavement is playing a more and more important role in the whole traffic system. Big span bridge has become more and more especially cement concrete bridge, therefore the bridge deck pavement bonding layers are emphasized as an important part of bridge traffic system, which can mitigate travel impact to bridge and magnify stationary or traffic amenity. The quality and durability of deck pavement bonding layer has directly effect on traffic safety, comfort, durability and investment of bridge. It represents the first line of defence against the ingress of water, road de-icing salts and aggressive chemicals. In real project, many early age damage of bridge deck pavement has become serious disease that affecting the function of bridge. During the construction of the bridge deck, many types of asphalt binders were used, such as styrene-butadiene-styrene (SBS) modified asphalt, styrene-butadiene rubber (SBR) modified asphalt, neoprene latex asphalt, etc. In this paper UTM-25 was used to test the tensile strength of different bridge deck pavement bonding layers with the different treatment methods to inter-surface.

Wu, Shaopeng; Han, Jun

2010-03-01

2

Research on tensile strength characteristics of bridge deck pavement bonding layers  

NASA Astrophysics Data System (ADS)

As the development of the traffic in the world, the bridge deck pavement is playing a more and more important role in the whole traffic system. Big span bridge has become more and more especially cement concrete bridge, therefore the bridge deck pavement bonding layers are emphasized as an important part of bridge traffic system, which can mitigate travel impact to bridge and magnify stationary or traffic amenity. The quality and durability of deck pavement bonding layer has directly effect on traffic safety, comfort, durability and investment of bridge. It represents the first line of defence against the ingress of water, road de-icing salts and aggressive chemicals. In real project, many early age damage of bridge deck pavement has become serious disease that affecting the function of bridge. During the construction of the bridge deck, many types of asphalt binders were used, such as styrene-butadiene-styrene (SBS) modified asphalt, styrene-butadiene rubber (SBR) modified asphalt, neoprene latex asphalt, etc. In this paper UTM-25 was used to test the tensile strength of different bridge deck pavement bonding layers with the different treatment methods to inter-surface.

Wu, Shaopeng; Han, Jun

2009-12-01

3

Plans: Poop Deck, Boat Deck, Housetop, Bridge Deck, Upper Bridge ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Plans: Poop Deck, Boat Deck, Housetop, Bridge Deck, Upper Bridge Deck, Navigating Bridge, Forecastle Deck, Upper Deck, Second Deck and Hold - Saugatuck, James River Reserve Fleet, Newport News, Newport News, VA

4

Bridge Deck Evaluation with Ground Penetrating Radar Dryver Huston, Jing Hu, Noel Pelczarski, and Brian Esser  

E-print Network

Bridge Deck Evaluation with Ground Penetrating Radar Dryver Huston, Jing Hu, Noel Pelczarski Health Monitoring Stanford University September 1999 ABSTRACT Ground Penetrating Radar (GPR) uses. Several technologies are available for the nondestructive evaluation of pavements. Ground penetrating

Huston, Dryver R.

5

Imaging radar for bridge deck inspection  

Microsoft Academic Search

Lawrence Livermore National Laboratory is developing a prototype imaging radar for inspecting steel reinforced concrete bridge decks. The system is designed to acquire synthetic aperture radar data and provide high-resolution images of internal structure, flaws, and defects enabling bridge inspectors to nondestructively evaluate and characterized bridge deck condition. Concrete delamination resulting from corrosion of steel reinforcing bars (rebars) is an

John P. Warhus; Jeffrey E. Mast; Scott D. Nelson

1995-01-01

6

Life-Cycle Cost Survey of Concrete Bridge Decks- A Benchmark for FRP Bridge Deck Replacement  

Microsoft Academic Search

A study on the life-cycle cost and performance of concrete bridge decks was conducted to establish a benchmark for fiber-reinforced polymer (FRP) bridge decks. A survey was developed and distributed to State Departments of Transportation engineers and the responses were analyzed. The survey facilitated identifying and estimating the cost parameters associated to concrete bridge deck replacement, and correlating cost with

Roberto Lopez-Anido

2001-01-01

7

BEHAVIOUR OF BRIDGE DECKS REINFORCED BY GFRP  

E-print Network

-scale highway bridge deck model reinforced by glass fibre reinforced polymer (GFRP) reinforcements and tested of the reinforcement ratio and type of reinforcement on the behaviour ofbridge decks are presented. KEYWORDS: bridge structures subjected to aggressive environmental conditions is attributed to the corrosion of the steel

8

Imaging radar for bridge deck inspection  

SciTech Connect

Lawrence Livermore National Laboratory (LLNL)l is developing a prototype imaging radar for inspecting steel reinforced concrete bridge decks. The system is designed to acquire Synthetic Aperture Radar (SAR) data and provide high-resolution images of internal structure, flaws, and defects enabling bridge inspectors to nondestructively evaluate and characterize bridge deck condition. Concrete delamination resulting from corrosion of steel reinforcing bars (rebars) is an important structural defect that the system is designed to detect. The prototype system uses arrays of compact, low-cost Micropower Impulse Radar (MIR) modules, supported by appropriate data acquisition and storage subsystems, to generate and collect the radar data, and unique imaging codes to reconstruct images of bridge deck internals. In this paper, we provide an overview of the prototype system concept, discuss its expected performance, and present recent experimental results showing the capability of this approach to detect thin delamination simulations embedded in concrete.

Warhus, J.; Mast, J.; Nelson, S.

1995-04-13

9

Imaging radar for bridge deck inspection  

NASA Astrophysics Data System (ADS)

Lawrence Livermore National Laboratory is developing a prototype imaging radar for inspecting steel reinforced concrete bridge decks. The system is designed to acquire synthetic aperture radar data and provide high-resolution images of internal structure, flaws, and defects enabling bridge inspectors to nondestructively evaluate and characterized bridge deck condition. Concrete delamination resulting from corrosion of steel reinforcing bars (rebars) is an important structural defect that the system is designed to detect. The prototype system uses arrays of compact, low-cost micropower impulse radar (MIR) modules, supported by appropriate data acquisition and storage subsystems, to generate and collect the radar data, and unique imaging codes to reconstruct images of bridge deck internals. In this paper, we provide an overview of the prototype system concept, discuss its expected performance, and present recent experimental results showing the capability of this approach to detect thin delamination simulations embedded in concrete.

Warhus, John P.; Mast, Jeffrey E.; Nelson, Scott D.

1995-05-01

10

Improved ground-penetrating radar, bridge decks  

SciTech Connect

Inspection of high-value structures, like bridges and buildings, using Ground Penetrating Radar (GPR) is an application of a technology that is growing in importance. In a typical inspection application, inspectors use GPR to locate structural components, like embedded reinforcing bars, to avoid weakening the structure while collecting core samples for detailed inspection. Advanced GPR, integrated with imaging technologies for use as an NDE tool, can provide the capability to quickly locate and characterize construction flaws and wear- or age-induced damage in these structures without resorting to destructive methods. In this paper, we discuss an important inspection application, namely, concrete bridge deck inspection. We describe an advanced bridge deck inspection system concept (Ground Penetrating Imaging Radar, GPIR) and present results from experiments designed to simulate the concept.

Warhus, J.P.; Mast, J.E.; Johansson, E.M.; Nelson, S.D.

1993-11-29

11

Acoustic inspection of concrete bridge decks  

NASA Astrophysics Data System (ADS)

The determination of concrete integrity, especially in concrete bridge decks, is of extreme importance. Current systems for testing concrete structures are expensive, slow, or tedious. State of the art systems use ground penetrating radar, but they have inherent problems especially with ghosting and signal signature overlap. The older method of locating delaminations in bridge decks involves either tapping on the surface with a hammer or metal rod, or dragging a chain-bar across the bridge deck. Both methods require a `calibrated' ear to determine the difference between good sections and bad sections of concrete. As a consequence, the method is highly subjective, different from person to person and even day to day for a given person. In addition, archival of such data is impractical, or at least improbable, in most situations. The Diagnostic Instrumentation and Analysis Laboratory has constructed an instrument that implements the chain-drag method of concrete inspection. The system is capable of real-time analysis of recorded signals, archival of processed data, and high-speed data acquisition so that post-processing of the data is possible for either research purposes or for listening to the recorded signals.

Henderson, Mark E.; Dion, Gary N.; Costley, R. Daniel

1999-02-01

12

Ultrasonic Underside Inspection for Fatigue Cracks in the Deck Plate of a Steel Orthotropic Bridge Deck  

Microsoft Academic Search

Due to an unexpected increase of heavy traffic large fatigue cracks appeared through the deck plate of orthotropic steel bridge decks in the Netherlands. Visual inspection revealed that this particular type of crack initiates where a weld joins the deck plate, a rib and a girder. These critical points are commonly inspected from the roadside, which necessitates that the road

M. C. M. Bakker; F. B. P. De Jong

2003-01-01

13

Experimental evaluation and field implementation of FRP bridge deck modules  

Microsoft Academic Search

Construction of highway bridge decks using fiber reinforced polymer (FRP) composite deck and superstructure modules in lieu of concrete decks has proven to be feasible. However, FRPí s are not widely accepted yet despite their benefits such as non-corrosiveness, higher strength to weight ratio, and better fatigue resistance than conventional materials. Lack of wider usage of FRP material is mainly

Woraphot Prachasaree; Vimala Shekar

2008-01-01

14

9. VIEW OF LOWER DECK OF FERRY BRIDGE, LOOKING EAST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

9. VIEW OF LOWER DECK OF FERRY BRIDGE, LOOKING EAST TOWARDS HUDSON RIVER - Delaware, Lackawanna & Western Railroad & Ferry Terminal, Ferry Slips & Bridges, Bounded by Observer, Newark & River Streets, Hudson River, Hoboken, Hudson County, NJ

15

15. UPPER DECK, VIEW OF FERRY BRIDGE, LOOKING EAST TOWARD ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

15. UPPER DECK, VIEW OF FERRY BRIDGE, LOOKING EAST TOWARD THE HUDSON RIVER - Delaware, Lackawanna & Western Railroad & Ferry Terminal, Ferry Slips & Bridges, Bounded by Observer, Newark & River Streets, Hudson River, Hoboken, Hudson County, NJ

16

8. Detail of underside of bridge deck, from the southern ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

8. Detail of underside of bridge deck, from the southern end looking toward north-northwest. - Bridge No. 4800, Spanning Minnesota River on Trunk Highway 4 between Brown & Nicollet Counties, Sleepy Eye, Brown County, MN

17

6. VIEW LOOKING WEST FROM BRIDGE DECK, SHOWING TOP LATERAL ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

6. VIEW LOOKING WEST FROM BRIDGE DECK, SHOWING TOP LATERAL BRACING, MAIN TIE AND COUNTERS, SWAY STRUTS AND BRACING, AND INTERMEDIATE POSTS - Hart County Bridge, State Route 181, spanning Savannah River, Hartwell, Hart County, GA

18

PERSPECTIVE VIEW OF THE REX T. BARBER BRIDGE DECK POUR, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

PERSPECTIVE VIEW OF THE REX T. BARBER BRIDGE DECK POUR, VIEW TO NORTH. - Rex T. Barber Veterans Memorial Bridge, Spanning Crooked River Gorge, Dalles-California Highway (US 97), Terrebonne, Deschutes County, OR

19

DETAIL PERSPECTIVE VIEW OF THE REX T. BARBER BRIDGE DECK ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

DETAIL PERSPECTIVE VIEW OF THE REX T. BARBER BRIDGE DECK POUR, VIEW TO NORTHEAST. - Rex T. Barber Veterans Memorial Bridge, Spanning Crooked River Gorge, Dalles-California Highway (US 97), Terrebonne, Deschutes County, OR

20

PERSPECTIVE VIEW OF THE REX T. BARBER BRIDGE DECK POUR, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

PERSPECTIVE VIEW OF THE REX T. BARBER BRIDGE DECK POUR, VIEW TO NORTHWEST SHOWING HIGH LINE SYSTEM. - Rex T. Barber Veterans Memorial Bridge, Spanning Crooked River Gorge, Dalles-California Highway (US 97), Terrebonne, Deschutes County, OR

21

Galvanic Cathodic Protection for Reinforced Concrete Bridge Decks - Field Evaluation.  

National Technical Information Service (NTIS)

This report describes the application of four sacrificial zinc anode cathodic protection systems to a reinforced concrete highway bridge deck. Two system designs were found to be the most promising in terms of polarized potentials and protective current d...

D. Whiting, D. Stark

1981-01-01

22

Fatigue classification of welded joints in orthotropic steel bridge decks  

Microsoft Academic Search

This dissertation presents the research into fatigue classifications of welded joints in orthotropic steel bridge decks. These classifications are needed to calculate the fatigue life of these joints and should be included in the design codes. For years bridge design was mainly based on static loading. Due to the development of modern light weight steel structures and extremely increasing traffic

M. H. Kolstein

2007-01-01

23

BEHAVIOUR OF CONCRETE BRIDGE DECK MODEL REINFORCED BY CARBON FRP  

E-print Network

model of a bridge deck slab reinforced by carbon fibre reinforced polymers, CFRP reinforcement different boundary conditions. Optical fibre sensors were used to monitor the strain of the CFRP's largest span bridge using CFRP as prestressing and shear reinforcement for four girders and for part

24

Numerical bridge deck studies using finite elements. Part I: flutter  

NASA Astrophysics Data System (ADS)

Wind-induced bridge motions are numerically investigated using structural and fluid finite elements (FEs). The fluid-structure interaction solutions are based on the incompressible Navier-Stokes equations fully coupled to an elastically suspended rigid body. The unsteady fluid field equations with advection-dominated flow are approximated using the weighted residuals method of Galerkin/least squares. The bridge deck is idealized as a lumped mass, spring-dashpot system. The flow simulation around a stationary bridge deck adopts the Eulerian scheme in the entire fluid domain, whereas the simulations of flow past a moving bridge deck apply the arbitrary Lagrangian-Eulerian formulation. Predicting the flutter limit, aiming at reducing the number of physical model tests currently required, is the first step and main objective in the validation of a numerical method applied to long-span bridge decks. It is shown that the low-frequency flexural-torsional flutter motion is the result of a different aerodynamic effect than vortex-induced bridge vibrations. Despite a laminar flow assumption, the two-dimensional self-excited flow solutions, on an irregular unstructured grid of 1884 nodes, predict a flutter limit in good agreement with wind tunnel experiments. The FE model appears to be a suitable method and could be applied as a supplementary tool to wind tunnel testing for the simulation of flutter instability. It was concluded that the prediction of flutter instability for sharp edge bridge decks does not appear sensitive to turbulence and three-dimensional flow structure modelling.

Frandsen, J. B.

2004-02-01

25

Quantifying reinforced concrete bridge deck deterioration using ground penetrating radar  

NASA Astrophysics Data System (ADS)

Bridge decks are deteriorating at an alarming rate due to corrosion of the reinforcing steel, requiring billions of dollars to repair and replace them. Furthermore, the techniques used to assess the decks don't provide enough quantitative information. In recent years, ground penetrating radar (GPR) has been used to quantify deterioration by comparing the rebar reflection amplitudes to technologies serving as ground truth, because there is not an available amplitude threshold to distinguish healthy from corroded areas using only GPR. The goal of this research is to understand the relationship between GPR and deck deterioration, and develop a model to determine deterioration quantities with GPR alone. The beginning of this research determines that not only is the relationship between GPR and rebar corrosion stronger than the relationship between GPR and delaminations, but that the two are exceptionally correlated (90.2% and 86.6%). Next, multiple bridge decks were assessed with GPR and half-cell potential (HCP). Statistical parameters like the mean and skewness were computed for the GPR amplitudes of each deck, and coupled with actual corrosion quantities based on the HCP measurements to form a future bridge deck model that can be used to assess any deck with GPR alone. Finally, in order to understand exactly which component of rebar corrosion (rust, cracking or chloride) attenuates the GPR data, computational modeling was carried out to isolate each variable. The results indicate that chloride is the major contributor to the rebar reflection attenuation, and that computational modeling can be used to accurately simulate GPR attenuation due to chloride.

Martino, Nicole Marie

26

Deck plate girder spans and steel piers of Bridge No. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Deck plate girder spans and steel piers of Bridge No. 1396, Fourth Potomac and Second B&O Crossing, over original B&O right of way (right) and flood plain (left), looking west. - Western Maryland Railway, Cumberland Extension, Pearre to North Branch, from WM milepost 125 to 160, Pearre, Washington County, MD

27

Galvanic cathodic protection for reinforced concrete bridge decks: Field evaluation  

Microsoft Academic Search

The application of four sacrificial zinc anode cathodic protection systems to a reinforced concrete highway bridge deck is described. Two system designs were found to be the most promising in terms of polarized potentials and protective current densities achieved during the 3 year monitoring program. One design uses commercially available zinc ribbon anodes spaced at 5 in (127 mm) centers;

D. Whiting; D. Stark

1981-01-01

28

Bridge deck designs for railing impacts  

E-print Network

for Test T202-65 Figure D-16. Drawing of Bridge Railing for Test T202-7S Figure D-17. Drawing of Bridge Railing for Test T202-BS Figure D-18. Drawing of Bridge Railing for Test T202-9S Figure D-19. Drawing of Bridge Railing for Test T202-10S Figure D... Tests T202-5S(top) and T202-65(bottom) Figure G-11. Photographs after Tests T202-7S(top) and T202-8S(bottom) Figure G-12. Photographs after Tests T202-9S(top) and T202-10S(bottom) Page 139 140 141 142 143 144 145 146 147 148 149 150...

Arnold, Althea Gayle

2012-06-07

29

DESIGN GUIDELINES FOR BRIDGE DECK SLABS REINFORCED by CFRP and GFRP  

E-print Network

- - - - - - - - - - - - - DESIGN GUIDELINES FOR BRIDGE DECK SLABS REINFORCED by CFRP and GFRP Tarek fibre reinforced polymer (CFRP, GFRP) reinforcements provides an alternative solution to extending deck slab reinforced by CFRP and hybrid GFRPlsteel, respectively, as well as a comprehensive non

30

Understanding the impulse response method applied to concrete bridge decks  

NASA Astrophysics Data System (ADS)

The Impulse Response (IR) method is a well-established form of non-destructive testing (NDT) where the dynamic response of an element resulting from an impact event (hammer blow) is measured with a geophone to make conclusions about the element's integrity, stiffness, and/or support conditions. The existing ASTM Standard C1740-10 prescribes a set of parameters that can be used to evaluate the conditions above. These parameters are computed from the so-called `mobility' spectrum which is obtained by dividing the measured bridge deck response by the measured impact force in the frequency domain. While applying the test method in the laboratory as well as on an actual in-service concrete bridge deck, the authors of this paper observed several limitations that are presented and discussed in this paper. In order to better understand the underlying physics of the IR method, a Finite Element (FE) model was created. Parameters prescribed in the Standard were then computed from the FE data and are discussed. One main limitation appears to be the use of a fixed upper frequency of 800 Hz. Test data from the real bridge deck as well as the FE model both show that most energy is found above that limit. This paper presents and discusses limitations of the ASTM Standard found by the authors and suggests ways for improving it.

Clem, D. J.; Popovics, J. S.; Schumacher, T.; Oh, T.; Ham, S.; Wu, D.

2013-01-01

31

BEHAVIOR OF 3-D WOVEN GLASS FIBER REINFORCED POLYMERIC BRIDGE DECK SLABS  

E-print Network

reinforced polymeric bridge decks that utilize an innovative textile engineering 3-D weaving technology. The current study utilizes the advancements in the three dimensional weaving technology in developing

32

Galvanic cathodic protection for reinforced concrete bridge decks: Field evaluation  

NASA Astrophysics Data System (ADS)

The application of four sacrificial zinc anode cathodic protection systems to a reinforced concrete highway bridge deck is described. Two system designs were found to be the most promising in terms of polarized potentials and protective current densities achieved during the 3 year monitoring program. One design uses commercially available zinc ribbon anodes spaced at 5 in (127 mm) centers; the other, custom-fabricated perforated zinc sheets. Both systems are overlaid with an open-graded asphalt friction course. The systems yield maximum current density and polarized potentials under warm and moist environment conditions.

Whiting, D.; Stark, D.

1981-06-01

33

Torsional stiffness degradation and aerostatic divergence of suspension bridge decks  

NASA Astrophysics Data System (ADS)

The mechanism of aerostatic torsional divergence (ATD) of long-span suspension bridges is investigated. A theoretical analysis on the basis of a generalized model is presented, showing that the vertical motion of a bridge deck is crucial to the torsional stiffness of the whole suspended system, and that the vertical motion of either cable with a magnitude beyond a certain threshold could result in a sudden degradation of the torsional stiffness of the system. This vertical motion-induced degradation of stiffness is recognized as the main reason for the ATD. Long-span suspension bridges are susceptible to such a type of divergence, especially when they are immersed in turbulent wind fields. The divergences that occur in turbulent wind fields differ significantly from those in smooth wind fields, and the difference is well explained by the generalized model that the loosening of any one cable could result in the vanishing of the part of stiffness provided by the whole cable system. The mechanism revealed in this paper leads to a definition of the critical wind speed of the ATD in a turbulent flow; that is, the one resulting in a vertical motion so large as to loosen either cable to a stressless state. Numerical results from the nonlinear finite-element (FE) analysis of the Xihoumen suspension bridge, in conjunction with observations from wind tunnel tests on an aero-elastic full bridge model, are in support of the viewpoint presented in this study.

Zhang, Z. T.; Ge, Y. J.; Yang, Y. X.

2013-07-01

34

Construction and cost analysis of an FRP reinforced concrete bridge deck  

Microsoft Academic Search

This paper describes the use of FRP materials as reinforcements and formwork for a concrete highway bridge deck. It describes the construction process and provides a cost analysis of the project. A continuing research program at the University of Wisconsin–Madison is developing concepts for bridge decks reinforced with fiber reinforced polymers (FRP). This project involved the implementation of one of

Adam C. Berg; Lawrence C. Bank; Michael G. Oliva; Jeffrey S. Russell

2006-01-01

35

Charleson et al. BEllAVIOUR OF A MODEL CONCRETE BRIDGE DECK  

E-print Network

Charleson et al. BEllAVIOUR OF A MODEL CONCRETE BRIDGE DECK · REINFORCED BY CFRP Kenneth CHARLESON will be the site of the first bridge in Canada to incorporate carbon fibre reinforced polymer (CFRP) reinforcement the strain of the CFRP. Behaviour of the deck slab, including the mode of failure under static loading

36

Health monitoring of precast bridge deck panels reinforced with glass fiber reinforced polymer bars  

NASA Astrophysics Data System (ADS)

The Beaver Creek Bridge on US highway 6 is the pilot project for Glass Fiber Reinforced Polymer (GFRP) bridge decks and posttensioned bridge decks in the state of Utah. The bridge was built in 2009, using accelerated bridge construction practices, including the use of precast prestressed girders, as well as precast decking. The westbound bridge decking was composed of 12 precast panels each measuring 41'-5" long, 6'-10" wide, and 9¼" thick, and weighing approximately 33 kips. At the time, these panels were the longest GFRP panels in the United States. The Utah Department of Transportation has decided to evaluate GFRP reinforcing bars as an alternative to steel rebar in this bridge deck. The hope is to increase the lifespan of bridge decks to match the service life of the entire bridge. Due to the nature of the GFRP bars, the panels were lifted at four points using straps instead of imbedded anchors. During the four-point lifting, the panels exhibited small deflections and strains; furthermore, no cracks larger than hairline cracks were found in the panels after lifting. The Beaver Creek Bridge deck is the first precast deck in the state of Utah to be posttensioned in the direction of traffic. Posttensioning bridge decks is expected to become the norm in the state of Utah. The posttensioning resulted in increased continuity between panels. In order to quantify the expected performance of the bridge during its service life, a truck load test was performed. The truck load test was comprised of a static and dynamic test. During the truck load test, the bridge experienced deflections in the panels which were 93% below design values. Girder deflections were also small. The use of GFRP bars has the potential to extend the life of bridge decks exposed to deicing salts from 45 years to 100 years, while only requiring an increased capital cost in the bridge of 8%. Furthermore, the use of GFRP bars in conjunction with accelerated building practices has the potential to reduce long-term user delays resulting from maintenance. The difference in capital cost could decrease as designers become more comfortable with the material and gain experience with the system.

Ries, James Mcdaniel

37

Full-scale fatigue tests of a cable-to-orthotropic bridge deck connection  

Microsoft Academic Search

Using a specially designed lever arm, full-scale fatigue tests of a cable-to-steel orthotropic bridge deck connection were conducted in the National Center for Research on Earthquake Engineering (NCREE). A 9.59m long, 2.7m high and 2.55m wide full-scale bridge deck was constructed in the steel fabricator's shop. The specimen was then shipped and anchored on the strong floor in NCREE's laboratory.

Chih-Han Lin; Ker-Chun Lin; Keh-Chyuan Tsai; Sheng-Jhih Jhuang; Min-Lang Lin; Jia-Chian Chen; Pei-Ching Chen; Kung-Juin Wang; Sheng-Lin Lin

38

Crack mitigation in concrete bridge decks through experimental analysis and computer modeling  

NASA Astrophysics Data System (ADS)

Bridge deck cracking can cause deterioration of bridge decks, leading to a shorter life span and poor performance. Throughout the US, cracking has been identified as a problem, with transverse cracking along the deck at regular spacings being the most prominent type. This problem is usually caused by drying shrinkage within the concrete. The material properties, restraint, and distances without expansion joints all affect the crack pattern within the deck. This study will delve into the reasons that bridge decks crack, the strains that are associated with drying shrinkage, and possible methods for abating its effects. The research is divided into two parts, the first being laboratory experimentation, which was conducted through the use of two 7 ft. x 10 ft. experimental concrete bridge bays. Each bay was instrumented with strain and temperature gages throughout the deck and girders, which collected data for six months. The first deck was poured with a control concrete mix used currently in Illinois. The second deck was poured with a type K expansive concrete, which could battle the effects of shrinkage. For both decks, the results suggest a compressive strain throughout the rebar and along the top surface of the concrete, except for the locations where cracks are found (at these locations the strain slopes upward into tension). The strain in the type K deck, though, was notably less than that in the control deck and the onset of cracking was delayed by three weeks, giving the indication of an improvement over the current mix design. The second portion of the research was focused on using a finite element model to replicate the bridge bay and study the results. Equivalent temperature loading was used to apply the shrinkage loads recorded during the experimental portion of the research. The model was then expanded to encompass a full-scale bridge and in order to provide some insight into shrinkage strain in the real world. The end goal is to help alleviate cracking in current bridge decks, as well as create suggestions for future bridge construction.

Richardson, Douglas M.

39

An Autonomous Unmanned Ground Vehicle for Non-Destructive Testing of Fiber-Reinforced Polymer Bridge Decks  

Microsoft Academic Search

The use of fiber-reinforced polymer (FRP) composite bridge decks is increasing in many civil engineering applications because of its many useful properties. The traditional reinforced concrete bridge decks have steel reinforcing bars embedded in concrete. Because of the use of deicing salt on the bridges to melt snow and ice in winter, the reinforcing bars tend to corrode, thus reducing

P. Klinkhachortt; A. Scott Mercer; Udaya B. Halabe; H. Hangarao

2007-01-01

40

Assessing the efficacy of stainless steel for bridge deck reinforcement under uncertainty using Monte Carlo simulation  

Microsoft Academic Search

Bridge engineers seek new materials, configurations and other design elements to minimise rehabilitation frequency and intensity over the facility life and hence, reduce life-cycle cost. This article discusses the potential of stainless steel as a bridge deck reinforcement material. The superiority of stainless steel over traditional steel was evaluated on the basis of long-term agency cost and user cost. Using

A. Cope; Q. Bai; A. Samdariya; S. Labi

2011-01-01

41

Double-Layer Prefabricated FRP Grids for Rapid Bridge Deck Construction: Case Study  

E-print Network

Double-Layer Prefabricated FRP Grids for Rapid Bridge Deck Construction: Case Study Lawrence C ; Bruce Nelson6 ; and Dennis McMonigal7 Abstract: This paper presents a case study of prefabricated double-layer bridges. The feasibility of modifying manufacturing techniques to create innovative double-layer, 3D

Russell, Jeffrey S.

42

First application of second-generation steel-free deck slabs for bridge rehabilitation  

NASA Astrophysics Data System (ADS)

The arching action in concrete deck slabs for girder bridges is utilized fully in steel-free deck slabs. These concrete slabs, requiring no tensile reinforcement, are confined longitudinally by making them composite with the girders, and transversely by external steel straps connecting the top flanges of external girders. Between 1995 and 1999, five steel-free deck slabs without any tensile reinforcement were cast on Canadian bridges. All these slabs developed fairly wide full-depth cracks roughly midway between the girders. While extensive fatigue testing done in the past three years has confirmed that the presence of even wide cracks does not pose any danger to the safety of the structures, wide cracks are generally not acceptable to bridge engineers. The developers of the steel-free deck slabs have now conceded that these slabs should be reinforced with a crack-control mesh of nominal glass fibre reinforced polymer (GFRP) bars. Steel-free deck slabs with crack-control meshes are being referred as the second generation slabs. With the help of testing on full-scale models, it has been found that deck slabs with GFRP bars have the best fatigue resistance and those with steel bars the worst.

Eden, Ruth; Klowak, Chad; Mufti, Aftab A.; Tadros, Gamil; Bakht, Baidar; Loewen, Eric

2004-07-01

43

Long-Term Chloride Penetration Resistance of Bridge Decks Made With Silica Fume Concretes  

Microsoft Academic Search

Cores were obtained in 2001 and 2002 from four concretes from bridge decks in New York State and one in Ohio and which had been exposed to de-icing salts. The Ohio bridge was 15 years old and made with silica fume concrete (804 pcy cementitious materials with 14.3% silica fume, 0.33 w\\/cm). The New York bridges included a 6 year

R. D. Hooton; E. Bentz; Moon Township

44

Fatigue Life of Damaged Bridge Deck Panels Strengthened With Carbon Fiber Hongseob Oh, Jongsung Sim, and Christian Meyer  

E-print Network

1 Fatigue Life of Damaged Bridge Deck Panels Strengthened With Carbon Fiber Sheets Hongseob Oh, Jongsung Sim, and Christian Meyer ABSTRACT To simulate fatigue damage to bridge deck slabs, cyclic loading to fatigue loads differed markedly from the results of static tests. Isotropic reinforcement was found

Meyer, Christian

45

Engineered Cementitious Composite May Replace Bridge Deck Joints  

E-print Network

of the same components as traditional portland cement concrete (including cement, aggregate, wa- ter and fly in three phases, starting in the lab, moving to the field, and then working to make improvements. continued Decks Based on Strain-Hardening Cementitious Composites--Phase 3: Shrinkage Control Start Date: July

Li, Victor C.

46

Development of early age shrinkage stresses in reinforced concrete bridge decks  

NASA Astrophysics Data System (ADS)

This paper describes the instrumentation and data analysis of a reinforced concrete bridge deck constructed on 3-span continuous steel girders in Evansville, West Virginia. An instrumentation system consisting of 232 sensors is developed and implemented specifically to measure strains and temperature in concrete deck, strains in longitudinal and transverse rebars, the overall contraction and expansion of concrete deck, and crack openings. Data from all sensors are automatically collected every 30 minutes starting at the time of placing the concrete deck. Measured strain and temperature time-histories were used to calculate the stresses, which were processed to attenuate the thermal effects due to daily temperature changes and isolate the drying shrinkage component. The results indicated that most of concrete shrinkage occurs during the first three days. Under the constraining effects from stay-in-place forms and reinforcement, early age shrinkage leads to elevated longitudinal stress, which is the main factor responsible for crack initiation.

William, Gergis W.; Shoukry, Samir N.; Riad, Mourad Y.

2008-12-01

47

Using emissivity-corrected thermal maps to locate deep structural defects in concrete bridge decks  

SciTech Connect

Dual-band infrared (DBIR) thermal imaging is a promising, non-contact, nondestructive evaluation tool to evaluate the amount of deteriorated concrete on asphalt-covered bridge decks. We conducted proof-of-principle demonstrations to characterize defects in concrete structures which could be detected with DBIR thermal imaging. We constructed two identical concrete slabs with synthetic delaminations, e.g., 1/8-in. thick styrofoam squares, implanted just above the 2-in.-deep steel reinforcement bars. We covered one of the slabs with a 2-in. layer of asphalt. We mounted the DBIR cameras on a tower platform, to simulate the optics needed to conduct bridge-deck inspections from a moving vehicle. We detected 4-in. implants embedded in concrete and 9-in. implants embedded in asphalt-covered concrete. The midday (above-ambient) and predawn (below-ambient) delamination-site temperatures correlated with the implant sizes. Using DBIR image ratios, we enhanced thermal-contrast and removed emissivity-noise, e.g., from concrete compositional variations and clutter. Using the LLNL/VIEW code, we removed the asphalt thermal-gradient mask, to depict the 4-in. deep, 9-in. square, concrete implant size. We plan to image bridge deck defects, from a moving vehicle, for accurate estimations of the amount of deteriorated concrete impairing the deck integrity. Potential longterm benefits are affordable and reliable rehabilitation for asphalt-covered decks.

Del Grande, N.K.; Durbin, P.F.

1995-04-05

48

Using emissivity-corrected thermal maps to locate deep structural defects in concrete bridge decks  

NASA Astrophysics Data System (ADS)

Dual-band infrared (DBIR) thermal imaging is a promising, noncontact, nondestructive evaluation tool to evaluate the amount of deteriorated concrete on asphalt-covered bridge decks. We conducted proof-of-principle demonstrations to characterize defects in concrete structures which could be detected with DBIR thermal imaging. We constructed two identical concrete slabs with synthetic delaminations, e.g., 1.8-in. thick styrofoam squares, implanted just above the 2-in. deep steel reinforcement bars. We covered one of the slabs with a 2-in. layer of asphalt. We mounted the DBIR cameras on a tower platform, to simulate the optics needed to conduct bridge-deck inspections from a moving vehicle. We detected 4-in. implants embedded in concrete and 9-in. implants embedded in asphalt-cevered concrete. The midday (above ambient) and predawn (below ambient) delamination-site temperatures correlated with the implant sizes. Using DBIR image ratios, we enhanced thermal-constrast and removed emissivity-noise, e.g., from concrete compositional variations and clutter. Using the LLNL/VIEW code, we removed the asphalt thermal-gradient mask to depict the 4-in. deep, 9- in. square, concrete implant site. We plan to image bridge deck defects from a moving vehicle for accurate estimations of the amount of deteriorated concrete impairing the deck integrity. Potential longterm benefits are affordable and reliable rehabilitation for asphalt-covered decks.

DelGrande, Nancy; Durbin, Philip F.

1995-05-01

49

HURRICANE INDUCED WAVE AND SURGE FORCES ON BRIDGE DECKS  

E-print Network

The damaging effects of hurricane landfall on US coastal bridges have been studied using physical model testing. Hurricane bridge damage and failure susceptibility has become very evident, especially during hurricane seasons 2004 and 2005...

McPherson, Ronald L.

2010-01-16

50

1. View,looking east,of the deck of the bridge taken from ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. View,looking east,of the deck of the bridge taken from the intersection of w. 25th Street and Detroit Avenue. The bridge connects the city's east and west side over the Cuyahoga River Valley. Photograph illustrates the flared approaches designed to accommodate an, open well, through which streetcars could enter the bridge's lower level. This plan was later abandoned after construction had already begun, in favor of short subways that would carry the streetcars west beneath Detroit Avenue for a distance of 725 feet and south beneath W. 25th St. for a distance of 560 feet. - Detroit Superior High Level Bridge, Cleveland, Cuyahoga County, OH

51

Characterization of stormwater runoff from bridges in North Carolina and the effects of bridge deck runoff on receiving streams  

USGS Publications Warehouse

In 2008, the North Carolina General Assembly passed House Bill 2436 that required the North Carolina Department of Transportation (NCDOT) to study the water-quality effects of bridges on receiving streams. In response, the NCDOT and the U.S. Geological Survey (USGS) collaborated on a study to provide information necessary to address the requirements of the Bill. To better understand the effects of stormwater runoff from bridges on receiving streams, the following tasks were performed: (1) characterize stormwater runoff quality and quantity from a representative selection of bridges in North Carolina; (2) measure stream water quality upstream from selected bridges to compare bridge deck stormwater concentrations and loads to stream constituent concentrations and loads; and (3) determine if the chemistry of bed sediments upstream and downstream from selected bridges differs substantially based on presence or absence of a best management practice for bridge runoff.

Wagner, Chad R.; Fitzgerald, Sharon A.; Sherrell, Roy D.; Harned, Douglas A.; Staub, Erik L.; Pointer, Brian H.; Wehmeyer, Loren L.

2011-01-01

52

Fabry-Perot sensors for the monitoring of FRP reinforced bridge decks  

NASA Astrophysics Data System (ADS)

The extensive use of deicing salts in Canada during winter times is identified as the main reason behind the deterioration of highway bridges and parking garages. To fight this infrastructure crisis, Fibre Reinforced Polymers (FRP) has become a very attractive alternative to traditional reinforcing steel due to their non-corrosive nature and light weight. The replacement of steel with Glass FRP bars in bridge deck slabs has been extensively researched in the last few years. This paper presents the first efforts to implement these bars in two highway bridges in Quebec, Canada, and Vermont, USA. These projects are aimed to prove the feasibility of using GFRP bars in bridge construction. GFRP bars were used as reinforcement for parts of the deck slabs in the two bridges while traditional steel was used in the remaining parts. Fibre Optic Sensors (FOS) were used to measure strains in the concrete, reinforcing bars and steel girders. The sensors were surface mounted on the bars or steel girders using standard glue, or embedded in concrete. Static and dynamic testing of the bridges was done using loaded trucks placed for maximum stresses. The design, construction, testing, and results obtained from the bridges are briefly outlined in this paper. The results indicated the accuracy of the sensors and their feasibility for bridge construction and remote monitoring.

Benmokrane, Brahim; Quirion, Marco; El-Salakawy, Ehab; Debaiky, Ahmed S.; Lackey, Tom

2004-07-01

53

DEVELOPMENT OF FRP BRIDGE DECKS AN ANALYTICAL INVESTIGATION -  

E-print Network

-tech" materials, including fiber reinforced polymer (FRP) composites. Composites offer inherent advantages over, design flexibility, corrOSIOn and fatigue resistance, low maintenance and extended service life and represents the most serious type of deterioration. These bridges must be replaced with a new system

54

Thick sandwich panel fabrication for bridge deck structure and its joint strength  

NASA Astrophysics Data System (ADS)

The purpose of this study is to evaluate the static strength of thick plate laser welded lap joint and the performance of thick sandwich panel for bridge deck structure. The strength of thin sheet laser welded lap joint whose thickness is less than 1.6 mm have been already reported, but the strength of thick plate laser welded lap joint whose thickness is more than 10 mm is not known. The authors believe this thick laser welded lap jont enable heavy industries to make a revolution on applying it for sandwich panel fabrication. Then, they have conducted mechanical tests of 10 mm + 6 mm thick laser welded lap joints to grasp their static strength. According to the obtained data, they fabricate a thick sandwich panel model of newly designed bridge deck structure for evaluation. The static lading test, cyclic loading test and collapsing test show that the thick sandwich panel has enough performance for the practical application.

Kitagawa, Akikazu; Fukuda, Naoaki; Takeda, Shinnosuke; Matsunawa, Akira

2003-03-01

55

Assessing effects of highway bridge deck runoff on near-by recieving waters in coastal margins using remote monitoring techniques  

E-print Network

ASSESSING EFFECTS OF HIGHWAY BRIDGE DECK RUNOFF ON NEARBY RECEIVING WATERS IN COASTAL MARGINS USING REMOTE MONITORING TECHNIQUES A Thesis by OKE NWANESHIUDU Submitted to the Office of Graduate Studies of Texas A&M University... in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE December 2004 Major Subject: Civil Engineering ASSESSING EFFECTS OF HIGHWAY BRIDGE DECK RUNOFF ON NEARBY RECEIVING WATERS IN COASTAL MARGINS USING REMOTE...

Nwaneshiudu, Oke

2005-02-17

56

Joint Sealants for Horizontal Pavement Joints—Specifically Bridge Joints  

Microsoft Academic Search

The various types of materials that have been used to seal bridge joints have been reviewed. Some of the bridge engineers joint material requirements have been listed together with the advantages and disadvantages of the three most widely used bridge joint sealants being specified and used today. It is felt that the cold applied two component asphalt-modified polyurethane sealants come

Thomas J. Green

1969-01-01

57

Ground-penetrating imaging radar development for bridge deck and road bed inspection  

SciTech Connect

Ground-penetrating imaging radar (GPIR) is proposed for large-area inspection of concrete and concrete/asphalt composite bridge decks and roadways. This technique combines ground-penetrating radar (GPR) with unique image reconstruction algorithms developed for identification and characterization of subsurface flaws and structural features. New data acquisition hardware and image reconstruction techniques, under development at LLNL, offer the possibility for reliable and efficient, high-resolution subsurface imaging through the use of improved ultra-wideband transmitters, antennas, and arrays, and enhanced image- and signal-processing software. A field test of a limited-capability prototype system is planned for FY-93, as is completion of a conceptual design for a practical inspection system. A follow-on program for FY-94 would focus on development and demonstration of an advanced bridge inspection system prototype based on the conceptual design completed during FY-93.

Warhus, J.P.; Mast, J.E.; Nelson, S.D.; Johansson, E.M.

1993-05-01

58

DEVELOPMENT AND CONSTRUCTION OF LOW-CRACKING HIGH-PERFORMANCE CONCRETE (LC-HPC) BRIDGE DECKS: FREE SHRINKAGE TESTS, RESTRAINED RING TESTS, CONSTRUCTION EXPERIENCE, AND CRACK SURVEY RESULTS  

E-print Network

The development, construction, and evaluation of low-cracking high-performance concrete (LC-HPC) bridge decks are described based on laboratory test results and experiences gained during the construction of 13 LC-HPC bridge decks in Kansas, along...

Yuan, Jiqiu

2011-12-31

59

Liu, Rees and Spitler. 1 Simulation of a Geothermal Bridge Deck Anti-icing System and Experimental Validation  

E-print Network

Liu, Rees and Spitler. 1 Simulation of a Geothermal Bridge Deck Anti-icing System and Experimental-term performance under expected future weather conditions. A method of simulating the performance of such a system of each component and their integration into the simulation of the whole system are described. Validation

60

Augmenting BIM with 3D Imaging Data to Control Drilling for Embeds into Reinforced Concrete Bridge Decks  

E-print Network

of a section of a railway bridge deck. Once the point clouds were processed, zones that are safe for drilling solutions for processing and incorporating point cloud data obtained from various 3D-imaging technologiesSocietyofCivilEngineers.Allrightsreserved. #12;IMPORTANCE OF THE RESEARCH Background of the Research The construction of a railway line requires

Kamat, Vineet R.

61

Plans: 3'/50 Cal. Gun Platform, Boat Deck House Top & ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Plans: 3'/50 Cal. Gun Platform, Boat Deck House Top & Fidley Top, Boat Deck, Radar Platform Lower, Pilot House Top, Navigation Bridge, Upper Bridge Deck, Poop Deck, Cargo Deck, Motor Boat Platform, Bridge Deck, Forecastle Deck, Upper Deck - Taluga, Suisun Bay Reserve Fleet, Benicia, Solano County, CA

62

Development and Construction of Low-Cracking High-Performance Concrete (LC-HPC) Bridge Decks: Free Shrinkage, Mixture Optimization, and Concrete Production  

E-print Network

The development and evaluation of low-cracking high-performance concrete (LC-HPC) for use in bridge decks is described based on laboratory test results and experience gained during the construction of 14 bridges. The study is divided into three...

Lindquist, Will David

2008-01-01

63

Accepted by Journal of Materials in Civil Engineering, 2011. Increasing the Service Life of Bridge Decks by Incorporating Phase Change Materials  

E-print Network

Accepted by Journal of Materials in Civil Engineering, 2011. Increasing the Service Life of Bridge the number of freeze/thaw cycles experienced by a structure will extend the structure's service life as regions where this technology may be practical, increasing the service life of a bridge deck by at least

Bentz, Dale P.

64

Examination of Single- and Multi-Channel GPR Bridge Deck Condition Assessment Methods with Comparison to Complementary NDE Results  

NASA Astrophysics Data System (ADS)

A sixteen-channel GPR system which houses both longitudinally- and transversely-polarized, 2.0 GHz antenna elements within a single housing was compared with a single-channel GPR system that was separately using both 1.5GHz and 2.6GHz antennas oriented in the transverse polarization, for the purpose of determining effectiveness of bridge deck condition assessment. The multi-channel system has obvious benefits which include closely-spaced GPR antennas (channels) that provide better lateral resolution, as well as combined data sets from co-linear antennas oriented in both the transverse and longitudinal polarizations, which has benefits for imaging within the deck's internal structure. However, the primary objective was to determine whether the multi-channel system would perform in a similar manner to proven single-channel GPR technology during an attenuation-based GPR condition assessment on an older, partially deteriorated deck in northwestern New Jersey that is annually exposed to freeze-thaw conditions as well as de-icing salts. These assessments were made by focusing on identifying the strongest reflections from the upper mat of transversely-oriented rebars within the deck and comparing reflection strength, or conversely, attenuation of the GPR signal, from each of the 'picked' GPR rebar responses. Coordinates for each of the GPR picks, along with amplitude or attenuation measurements, were gridded and contour-plotted for the purpose of identifying areas identified as either relatively deteriorated or sound. Initially, results were compared for data with no applied correction that takes into account GPR signal attenuation with increasing depth within the concrete deck. Final GPR maps were produced incorporating a depth-correction technique similar to what is described by Barnes, et. al., Romero, et. al, and Gucunski, et. al., a process which has been clearly demonstrated to better correlate GPR results with not only ground truth (cores, sounding) but also with other NDE technologies. Not only did all the single- and multi-channel system comparisons generate nearly identical deterioration maps when GPR results were compared and examined, but mapped results obtained from other NDE methods on the same deck were used to identify zones where corrosive environment (electrical resistivity - ER) elastic modulus (ultrasonic surface wave - USW), and identified delaminations (impact-echo - IE) had commonality with the GPR results. A summary of the equipment used, as well as general data collection and analysis procedures is provided for the GPR condition assessments. Brief descriptions of background and references to how the complementary NDT technologies are deployed, and how data are interpreted, are also discussed. Comparative maps for all technologies are used for illustrative purposes.

Romero, Francisco A.; Manacorda, Guido; Simi, Alessandro; Gucunski, Nenad; Parvardeh, Hooman

2013-04-01

65

9. VIEW OF UNDERSIDE, LOOKING W, DECK BEAMS, DECKING, AND ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

9. VIEW OF UNDERSIDE, LOOKING W, DECK BEAMS, DECKING, AND ABUTMENT CONSTRUCTED OF UNDRESSED LOCAL STONE. - Slates' Mill Bridge, Township Road 439 spanning South Branch of Tunkhannock Creek in Benton Township, Dalton, Lackawanna County, PA

66

A Report on Continuity Between Reinforced Concrete Pavement and a Continuous Slab Bridge.  

National Technical Information Service (NTIS)

In early 1964 the Texas Highway Department completed an experimental project in which reinforcing steel was used to tie the terminal end of a continuously reinforced concrete pavement (CRCP) to an overpass approach slab which, in turn, was tied to both th...

B. F. McCullough, F. Herber

1966-01-01

67

Design and Field Demonstration of ECC Link Slabs for Jointless Bridge Decks  

E-print Network

in history, the contribution of the interstate highway system to the development of the United States bridges throughout the US is an increasingly large concern for highway transportation authorities as an economic power is doubtless. In 2002 alone, commercial freight transported over the interstate system

Lepech, Michael D.

68

Combined loading of a bridge deck reinforced with a structural FRP stay-in-place form  

E-print Network

and Environmental Engineering, University of Wisconsin-Madison, WI 53706, United States Available online 14 January axial load because it also serves as the top chord of the truss for the bridge system; corrosion in the steel form and in the reinforcement due to the trapped moisture; unsightly conditions also

Bank, Lawrence C.

69

Stopper-Bearing System – A Solution to Displacement Control of Bridge Decks  

E-print Network

of the SBS is obtained from ABAQUS and used to define the SBS within reinforced concrete analytical bridge models developed in SAP2000, which are subjected to the 1999 Chi- Chi, Taiwan earthquake ground motion (1.01g - E-W component and 0.43g - N-S component...

Tsai, Yi-Te

2010-10-12

70

Seismic Integrity of a Long Span Bridge with Tower-Deck Buffers  

SciTech Connect

The wind action is acknowledged to be the primary environmental load in the design of suspension bridges. It affects both the performance of safety and serviceability. Nevertheless, the impact of earthquakes cannot be neglected especially when the construction site is located in a high seismicity region. The evaluation of the vulnerability of a suspension bridge requires a hazard analysis on the site, the definition of the seismic intensity related to the desired return periods, the generation of artificial signals for the reference site and the collection of critical records for integrity analyses,. The signals will then be used in the structural analyses for the verification of structural safety and structural robustness. This paper is focused on the generation of these critical signals, with their own a-synchronicity, and the associated numerical nonlinear analyses, which must be conducted in the time domain.

Casciati, Fabio [University of Pavia, Department of Structural Mechanics, Via Ferrata 1, Pavia (Italy); Giuliano, Fabio [Univerity of Rome 'La Sapienza' (Italy)

2008-07-08

71

Glass fiber-reinforced polymer\\/steel hybrid honeycomb sandwich concept for bridge deck applications  

Microsoft Academic Search

Glass fiber-reinforced polymer (GFRP) materials possess inherently high strength-to-weight ratios, but their elastic moduli are low relative to civil engineering (CE) construction materials. As a result, serviceability issues are what govern GFRP material design in the CE bridge industry. Therefore, the study objective was to increase the stiffness of a commercial GFRP honeycomb sandwich panel through the inclusion of steel

Nicolas J Lombardi

2008-01-01

72

Smart Control of a Geothermally Heated Bridge Deck Stephen C. Jenks (o) 580-767-4374  

E-print Network

in water bodies. The second is a reduction in bridge life due to the corrosive effects of salt on rebar Inc. (f) 580-767-6316 P.O. Box 1267 Stephen.C.Jenks@conoco.com Ponca City, OK 74602-1267 James R of tables 2 500 Number of figures 8 2,000 Total effective number of words 7,444 TRB 2003 Annual Meeting CD

73

HERMES: a high-speed radar imaging system for inspection of bridge decks  

SciTech Connect

Corrosion of rebar in concrete bridges causes subsurface cracks and is a major cause of structural degradation that necessitates repair or replacement. Early detection of corrosion effects can limit the location and extent of necessary repairs, while providing long-term information about the infrastructure status. Most current detection methods, however, are destructive of the road surface and require closing or restricting traffic while the tests are performed. A ground-penetrating radar imaging system has been designed and developed that will perform the nondestructive evaluation of road-bed cracking at traffic speeds; i.e., without the need to restrict traffic flow. The first-generation system (called the HERMES bridge inspector), consists of an offset-linear array of 64 impulse radar transceivers and associated electronics housed in a trailer. Computers in the trailer and in the towing vehicle control the data acquisition, processing, and display. Cross-road resolution is three centimeters at up to 30 cm in depth, while down-road resolution depends on speed; 3 cm below 20 mph up to 8 cm at 50 mph. A two-meter- wide path is inspected on each pass over the roadway. This paper, describes the design of this system, shows preliminary results, and lays out its deployment schedule.

Azevedo, S.G.

1996-10-26

74

Evaluation of Concrete Deck and Crack Sealers.  

National Technical Information Service (NTIS)

The primary objective of this study was to assess the effectiveness and relative performance of commercially available concrete bridge deck and crack sealants. A total of thirteen deck sealants and ten crack sealants were selected for study under laborato...

J. A. Pincheira, M. A. Dorshorst

2005-01-01

75

Rapid bridge deck replacement  

E-print Network

Authority at Albany, New York, with the difference being that fast-setting sand cement grout was used instead of epoxy mortar . The levelling device for the precast panels was composed of bolts that were turned 1nto threaded sockets cast 1n the panels... Authority at Albany, New York, with the difference being that fast-setting sand cement grout was used instead of epoxy mortar . The levelling device for the precast panels was composed of bolts that were turned 1nto threaded sockets cast 1n the panels...

Osegueda, Roberto Alejandro

2012-06-07

76

Pavement management  

SciTech Connect

The 11 papers in this report deal with the following areas: effect of pavement roughness on vehicle fuel consumption; rational seasonal load restrictions and overload permits; state-level pavement monitoring program; data requirements for long-term monitoring of pavements as a basis for development of multiple regression relations; simplified pavement management at the network level; combined priority programming of maintenance and rehabilitation for pavement networks; Arizona pavement management system: Phase 2-verification of performance prediction models and development of data base; overview of paver pavement management system; economic analysis of field implementation of paver pavement management system; development of a statewide pavement maintenance management system; and, prediction of pavement maintenance expenditure by using a statistical cost function.

Ross, F.R.; Connor, B.; Lytton, R.L.; Darter, M.I.; Shahin, M.Y.

1982-01-01

77

Shear Connections for the Development of a Full-Depth Precast Concrete Deck System  

E-print Network

of the transportation infrastructure. Bridges are commonly constructed from steel or precast prestressed concrete girders with bridge deck that is either cast-in-place (CIP) (see Fig. 1(a)) or composed of stay-in-place (SIP) partial-depth precast deck panels with a... to the development of the precast bridge deck overhang system investigated within this thesis, composite action between a CIP deck or SIP precast panel deck and ____________ This thesis follows the style of Journal of Structural Engineering. 2...

Henley, Matthew D.

2010-07-14

78

Use of fibre reinforced polymer reinforcement integrated with fibre optic sensors for concrete bridge deck slab construction  

Microsoft Academic Search

The use of corrosion free fibre reinforced polymer (FRP) composites as reinforcement to concrete is cur- rently being seen as a promising option to generate durable concrete structures. However, there exists very little credi - ble information about its field application and performance. This paper describes the Joffre Bridge project, in Sherbrooke (Québec, Canada), over the St-François River, where Carbon

Brahim Benmokrane; Habib Rahman; Phalguni Mukhopadhyaya; Radhouane Masmoudi; Mohammed Chekired; Jean-François Nicole; Adel El-Safty

2000-01-01

79

ANALYSIS OF A BRIDGE DECK BUILT on U.S. HIGHWAY 151 WITH FRP STAY-IN-PLACE  

E-print Network

.S. Highway 151 near Waupun, Wisconsin using fiber reinforced polymer (FRP) materials as reinforcement properties to steel rebars, they are also lightweight and non-corrosive. The FRP reinforcement system pertaining to the type and quantity of material, labor, and equipment required to construct each bridge

Bank, Lawrence C.

80

4. View looking east of lower streecar deck of concrete ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. View looking east of lower streecar deck of concrete approach spans. The lower deck was designed to carry six street railway tracks; only four were ever installed. The lower deck had a vertical clearance of 15 feet. - Detroit Superior High Level Bridge, Cleveland, Cuyahoga County, OH

81

Permeable Pavement  

NSDL National Science Digital Library

Students investigate how different riparian ground covers, such as grass or pavement, affect river flooding. They learn about permeable and impermeable materials through the measurement how much water is absorbed by several different household materials in a model river. Students use what they learn to make recommendations for engineers developing permeable pavement. Also, they consider several different limitations for design in the context of a small community.

Integrated Teaching And Learning Program

82

LRRB Pavement Management Systems Pavement Management Systems  

E-print Network

LRRB Pavement Management Systems Pavement Management Systems Presented by: Michael Marti SRF for implementing and monitoring research results (RIC) #12;LRRB Pavement Management Systems LRRB Structure LRRB and counties in implementing Pavement Management and/or using better §Project produced several deliverables

Minnesota, University of

83

Bridges  

NSDL National Science Digital Library

Bridges come in a wide variety of sizes, shapes, and lengths and are found all over the world. It is important that bridges are strong so they are safe to cross. Design and build a your own model bridge. Test your bridge for strength using a force sensor that measures how hard you pull on your bridge. By observing a graph of the force, determine the amount of force needed to make your bridge collapse.

Consortium, The C.

2012-05-21

84

Pavement Systems Analyses.  

National Technical Information Service (NTIS)

Contents: Prestressed concrete highway pavement at Dulles International Airport; Relative effects of structural variables on the performance of continuous pavements; Finite-element analysis of concrete slabs and its implications for rigid pavement design;...

B. F. Friberg, T. J. Pasko

1973-01-01

85

CONCRETE PAVEMENT Reference Manual  

E-print Network

CONCRETE PAVEMENT Reference Manual Prepared for Federal Highway Administration Office of Pavement by National Concrete Pavement Technology Center at Iowa State University 2711 South Loop Drive, Suite 4700 No. 3. Recipient's Catalog No. 4. Title and Subtitle 5. Report Date February 2008 Concrete Pavement

86

VIEW TO THE SOUTHWEST. FRETWORK RAILINGS ON THE DECK REFLECT ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

VIEW TO THE SOUTHWEST. FRETWORK RAILINGS ON THE DECK REFLECT THE DECORATIVE AND UTILITARIAN ASPECTS OF THE ARCHITECTURE. - Keller Memorial Bridge, Spanning Tennessee River at U.S. Highway 31, Decatur, Morgan County, AL

87

2. GENERAL VIEW, FROM DECK, SHOWING THREE OF FOUR TOWERS ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. GENERAL VIEW, FROM DECK, SHOWING THREE OF FOUR TOWERS - Jones Beach State Parkway Channel Bascule Bridge MP-3, Route 908 E, spanning Sloop Channel Southeast of East Bay, Hempstead, Nassau County, NY

88

9. DETAIL OF PRATT DECK TRUSS, AND NORTH PORTAL OF ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

9. DETAIL OF PRATT DECK TRUSS, AND NORTH PORTAL OF PENNSYLVANIA PETIT TRUSS WITH CONCRETE SUPPORTING PIER, LOOKING SOUTHWEST - James Bethel Gresham Memorial Bridge, Spanning Green Pond River at Kentucky Route 81, Calhoun, McLean County, KY

89

Interior view of eastern lift span, with decking above, looking ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Interior view of eastern lift span, with decking above, looking back from center of span, toward lift mechanism area. - Arlington Memorial Bridge, Spanning Potomac River between Lincoln Memorial & Arlington National Cemetery, Washington, District of Columbia, DC

90

Deck view, west approach; former Western Pacific (now Union Pacific) ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Deck view, west approach; former Western Pacific (now Union Pacific) Railroad at left; wind turbine generators atop hill in background; view to northeast; 90mm lens - Carroll Overhead Bridge, Altamont Pass Road, Livermore, Alameda County, CA

91

Bridges  

NSDL National Science Digital Library

Through a five-lesson series that includes numerous hands-on activities, students are introduced to the importance and pervasiveness of bridges for connecting people to resources, places and other people, with references to many historical and current-day examples. In learning about bridge typesâarch, beam, truss and suspensionâstudents explore the effect of tensile and compressive forces. Students investigate the calculations that go into designing bridges; they learn about loads and cross-sectional areas by designing and testing the strength of model piers. Geology and soils are explored as they discover the importance of foundations, bearing pressure and settlement considerations in the creation of dependable bridges and structures. Students learn about brittle and ductile material properties. Students also learn about the many cost factors that comprise the economic considerations of bridge building. Bridges are unique challenges that take advantage of the creative nature of engineering.

Integrated Teaching And Learning Program

92

SOURCE: UNIVERSITY OF CALIFORNIA PAVEMENT RESEARCH CENTER PAVEMENT TECHNOLOGY UPDATE  

E-print Network

SOURCE: UNIVERSITY OF CALIFORNIA PAVEMENT RESEARCH CENTER PAVEMENT TECHNOLOGY UPDATE at the California Department of Transportation. Content is provided by the University of California Pavement Research Center. The University of California Pavement Research Center Using innovative research and sound

California at Berkeley, University of

93

VIEW OF BRIDGE, LOOKING SOUTHWEST, WITH SOUTHERN PACIFIC RAILROAD BRIDGE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

VIEW OF BRIDGE, LOOKING SOUTHWEST, WITH SOUTHERN PACIFIC RAILROAD BRIDGE IN BACKGROUND. THE PAVEMENT OF THE NORTH APPROACH IS SEEN BURIED ON THE RIGHT. ROADWAY (CENTER) CROSSES THE USUALLY DRY CHANNEL OF THE SALT RIVER. A BALUSTRADE OF THE MILL AVENUE BRIDGE IS SEEN AT THE LOWER LEFT CORNER - Ash Avenue Bridge, Spanning Salt River at Foot of Ash Avenue, Tempe, Maricopa County, AZ

94

Recycling of pavement materials  

E-print Network

materials. A comparison was made between the recycled pavements and typical conventional asphalt concrete pavements. An economic asse?sment of thc recycled pavements was made to determine thc economic feasibility of recycling. Results of laboratory... evaluations show that: recycled pavement mixtures possess properties equivalent to conventional asphalt concrete mixtures; and rccvcl inI' con ho accom- plished with conventional ertuapment. kyar po I'lotion associated with hot-mix recycling of asphalt...

O'Neal, Randy Jim

2012-06-07

95

STONE PAVEMENTS IN DESERTS  

Microsoft Academic Search

Stone pavements are armored surfaces comprising intricate mosaics of coarse particles, usually only one or two stones thick, set on or in fine material. They occur widely in many unvegetated areas, and preeminently in hot deserts. Pavement studies in several deserts, and especially in Chile and California, suggest that: 1) deflation may be a relatively unimportant process of pavement formation;

RONALD U. COOKE

1970-01-01

96

Bridges  

MedlinePLUS

... mouth where there is a lot of biting force. They also may not be the best choice if the wings will have to be small to avoid getting in the way of the bite or the gums. Getting a bridge requires at ...

97

10. View west from the deck of the Kenyon School ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

10. View west from the deck of the Kenyon School Road Bridge (Rhode Island Bridge No. 489) showing water tower of Kenyon Industries mill complex in background. - Kenyon Village, Kenyon School Road, Sherman Avenue, & Lewiston Avenue, Richmond (historical), Providence County, RI

98

Modeling and characterization of fiber-reinforced plastic honeycomb sandwich panels for highway bridge applications  

Microsoft Academic Search

Fiber-reinforced plastic (FRP) composite decks have been increasingly used in highway bridge applications, both in new construction and rehabilitation and replacement of existing bridge decks. Recent applications have demonstrated that FRP honeycomb panels can be effectively and economically used for highway bridge deck systems. This paper is concerned with design modeling and experimental characterization of a FRP honeycomb panel with

Julio F Davalos; Pizhong Qiao; X Frank Xu; Justin Robinson; Karl E Barth

2001-01-01

99

4/28/2010 1Porous Pavements Porous Pavements  

E-print Network

benefits Why Look at New Pavement Approaches? #12;4/28/2010 4Porous Pavements 4Porous Pavements Alternative) ·! Farmington Schools - Parking lot ·! Mound Commercial Center - Parking lot ·! Park Rapids Mixed Use

Minnesota, University of

100

Pavement evaluation and rehabilitation  

SciTech Connect

The 20 papers in this report deal with the following areas: determination of layer moduli using a falling weight deflectometer; evaluation of effect of uncrushed base layers on pavement performance; the effect of contact area shape and pressure distribution on multilayer systems response; sensitivity analysis of selected backcalculation procedures; performance of a full-scale pavement design experiment in Jamaica; subsealing and load-transfer restoration; development of a demonstration prototype expert system for concrete pavement evaluation; numerical assessment of pavement test sections; development of a distress index and rehabilitation criteria for continuously reinforced concrete pavements using discriminant analysis; a mechanistic model for thermally induced reflection cracking of portland cement concrete pavement with reinforced asphalt concrete overlay; New Mexico study of interlayers used in reflective crack control; status of the South Dakota profilometer; incorporating the effects of tread pattern in a dynamic tire excitation mechanism; external methods for evaluating shock absorbers for road-roughness measurements; factor analysis of pavement distresses for surface condition predictions; development of a utility evaluation for nondestructive-testing equipment used on asphalt-concrete pavements; estimating the life of asphalt overlays using long-term pavement performance data; present serviceability-roughness correlations using rating panel data; video image distress analysis technique for Idaho transportation department pavement-management system; acceptability of shock absorbers for road roughness-measuring trailers.

Ali, N.A.; Khosla, N.P.; Johnson, E.G.; Hicks, R.G.; Uzan, J.

1987-01-01

101

12th Annual Minnesota Pavement  

E-print Network

12th Annual Minnesota Pavement Conference: Session Summaries Conference Sponsors: Minnesota Research Alliance (TERRA) Pavement Research Institute (PRI) Hosted by: Center for Transportation Studies provides information to practitioners and others in pavement design, construction, and maintenance

Minnesota, University of

102

Pavement condition data analysis  

SciTech Connect

This paper describes a computer methodology for analyzing pavement condition data to define inputs for pavement management systems. This system of programs was developed during a Federal Highway Administration research project. In the project, eight state highway departments were studied to determine the types of pavement condition data collected, procedures used for collecting data, the inputs to the states' pavement management systems, and computer programs used by the states to analyze raw pavement condition data. Several of the programs were assembled into the Method for Analyzing Pavement Condition, MAPCON, during a project performed at Pennsylvania State University. These and other existing or new programs (a total of 18) were identified, tested, modified, and incorporated onto a MS/DOS microcomputer system. MAPCON guides the user through selection of analysis method, raw data entry, and data analysis.

Zaniewski, J.P.; Hudson, S.W.; Hudson, W.R.

1987-07-01

103

Fatigue performance of welded aluminum deck structures  

SciTech Connect

Aluminum alloys are used increasingly in load carrying structures where low weight and low maintenance costs are at a premium. Helicopter decks, structures for living quarters and personnel transfer bridges between platforms are examples of offshore applications. While these structures are not usually subjected to high fatigue loads, the increasing use of aluminum in high speed ships, and more recently in highway bridge structures, makes the question of fatigue performance more important. In this paper the fatigue properties of small scale weldments in an AA6005 alloy are compared with the results of fatigue tests on full scale sections of welded extrusions in the same material, which were used in an aluminum bridge deck structure. The fatigue performance is also compared with the fatigue clauses in the new British design code BS8118 for aluminium structures and the proposed Eurocode 9. The prospects of using a new joining technique, friction stir welding (FSW), in the production of large scale panels for deck and ship hull structures is discussed. The FSW process is described briefly, and some fatigue test data are presented.

Haagensen, P.J.; Ranes, M.; Kluken, A.O.; Kvale, I.

1996-12-01

104

Deck addition at Palmer <  

NSF Publications Database

... EAM NSF Org: OD / OPP Date : January 31, 1991 File : opp93020 DIVISION OF POLAR PROGRAMS OFFICE OF ... Deck Addition at Palmer Station BioLab) To: Files (S.7 - Environment) On January 18, 1991, the ...

105

Pavement Thickness Design Parameter  

E-print Network

Pavement Thickness Design Parameter Impacts 2012 Municipal Streets Seminar November 14, 2012 Paul D Thickness Design · Design Traffic ­ Average daily traffic volume ­ Percent trucks on the street · Usually 2RoadXpress (Asphalt Institute) ­ American Concrete Paving Association · StreetPave ­ AASHTO 1993 Pavement Design Guide

106

Asphalt in Pavement Maintenance.  

ERIC Educational Resources Information Center

Maintenance methods that can be used equally well in all regions of the country have been developed for the use of asphalt in pavement maintenance. Specific information covering methods, equipment and terminology that applies to the use of asphalt in the maintenance of all types of pavement structures, including shoulders, is provided. In many…

Asphalt Inst., College Park, MD.

107

12. MAIN DECK, VIEW FROM NEAR POOP DECK. VIEW FORWARD ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

12. MAIN DECK, VIEW FROM NEAR POOP DECK. VIEW FORWARD OF MIDSHIP AREA WITH MASTS AND FIVE PORT OIL TANK HATCHES SEEN AT LEFT. - Ship "Falls of Clyde", Hawaii Maritime Center,Pier 7, Honolulu, Honolulu County, HI

108

Pavement Design TTP Orientation Seminar  

E-print Network

Pavement Design TTP Orientation Seminar 2013 #12;What are Pavements? · Engineered structures vehicles ­Freight and freight handling ­Trains and trams ­Aircraft and spacecraft #12;Pavement Types · Surface Treatment ­ Thin sprayed asphalt on granular bases · Permeable Pavement ­ Open graded asphalt

Handy, Susan L.

109

Pavement Design TTP Orientation Seminar  

E-print Network

Pavement Design TTP Orientation Seminar 2010 #12;What are Pavements? · Engineered structures vehicles ­Freight and freight handling ­Trains and trams ­Aircraft and spacecraft #12;Pavement Types · Surface Treatment ­ Thin sprayed asphalt on granular bases · Permeable Pavement ­ Open graded asphalt

Handy, Susan L.

110

Pavement Design TTP Orientation Seminar  

E-print Network

Pavement Design TTP Orientation Seminar 2011 #12;What are Pavements? · Engineered structures vehicles ­Freight and freight handling ­Trains and trams ­Aircraft and spacecraft #12;Pavement Types · Surface Treatment ­ Thin sprayed asphalt on granular bases · Permeable Pavement ­ Open graded asphalt

Handy, Susan L.

111

Pavement management practices. Final report  

SciTech Connect

This synthesis will be of interest to pavement designers, maintenance engineers, and others responsible for the management of highway pavements. Information is presented on pavement management systems - the established, documented procedures used to treat all activities involved in providing and sustaining pavements in an acceptable condition. As highway agencies focus more attention on maintenance and rehabilitation of highway networks, the use of some form of a pavement management system becomes increasingly important. This report of the Transportation Research Board describes the features, applicability, and used of a pavement management system and recommends five general steps for implementing a new pavement management system or improving an existing system.

Peterson, D.E.

1987-11-01

112

SURROGATE BRIDGE FREEZING SRDJAN JANKOVIC  

E-print Network

for advanced bridge deck heating control strategies. In order to develop the "smart" control system, some data Department of Transportation and the Federal Highway Administration for funding this project. I also extend

113

Boeing flight deck design philosophy  

NASA Technical Reports Server (NTRS)

Information relative to Boeing flight deck design philosophy is given in viewgraph form. Flight deck design rules, design considerations, functions allocated to the crew, redundancy and automation concerns, and examples of accident data that were reviewed are listed.

Stoll, Harty

1990-01-01

114

Loose Canons on Deck  

E-print Network

Canons onDeck. It's very rare. If it weren't for Josh, I don't think I'd ever have found a copy!” I truly doubted that any APA or fanzine could evade the bloodhound-like focus of a Completist on the scent. Honestly, if the FBI had that kind of crazed...

2012-12-24

115

PAVEMENT TECHNOLOGY UPDATE This Technology Transfer Program  

E-print Network

PAVEMENT TECHNOLOGY UPDATE This Technology Transfer Program publication is funded by the Division by the University of California Pavement Research Center. The University of California Pavement Research Center Using innovative research and sound engineering principles to improve pavement structures, materials

California at Berkeley, University of

116

Pavement conference..............2 Eno award ...............................3  

E-print Network

· Pavement conference..............2 · Eno award ...............................3 · ITSO conference work with intelligent pavement, which elimi- nates the need for external sensors by enabling the pavement itself to detect vehicles. Yu cre- ates the pavement by incorporating carbon nanotubes

Minnesota, University of

117

5. DECK FROM SOUTH, ON EAST SIDEWALK. LOOKING NORTH. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

5. DECK FROM SOUTH, ON EAST SIDEWALK. LOOKING NORTH. - Route 31 Bridge, New Jersey Route 31, crossing disused main line of Central Railroad of New Jersey (C.R.R.N.J.) (New Jersey Transit's Raritan Valley Line), Hampton, Hunterdon County, NJ

118

6. DECK OF SIDEWALK AND GUARD RAILS. LOOKING NORTH. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

6. DECK OF SIDEWALK AND GUARD RAILS. LOOKING NORTH. - Route 31 Bridge, New Jersey Route 31, crossing disused main line of Central Railroad of New Jersey (C.R.R.N.J.) (New Jersey Transit's Raritan Valley Line), Hampton, Hunterdon County, NJ

119

CLOSEUP OF TYPICAL BUILTUP, RIVETED AND PIN CONNECTED DECK TRUSS ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

CLOSE-UP OF TYPICAL BUILT-UP, RIVETED AND PIN CONNECTED DECK TRUSS LOOKING UP AND NORTHEAST. - Huey P. Long Bridge, Spanning Mississippi River approximately midway between nine & twelve mile points upstream from & west of New Orleans, Jefferson, Jefferson Parish, LA

120

7. View showing placement of timber deck placement on chord ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

7. View showing placement of timber deck placement on chord and built up construction of top chord and continuous construction through top panel points, eye bar construction on bottom chord - Bridge No. 2.4, Spanning Boiling Fork Creek at Railroad Milepost JC-2.4, Decherd, Franklin County, TN

121

22. View is from the deck, looking down to the ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

22. View is from the deck, looking down to the junction of the last pony truss and the first through truss. This shows how the respective end posts are embedded into the concrete pier extension. There are only two of these, located on each end of pier #6. - Weidemeyer Bridge, Spanning Thomes Creek at Rawson Road, Corning, Tehama County, CA

122

Automated pavement crack detection  

E-print Network

AUTOMATED PAVEMENT CRACK DETECTION A Thesis by ASHOK MADHAVA RAO Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE December 1991 Major Subject...: Electrical Engineering AUTOMATED PAVEMENT CRACK DETECTION A Thesis by ASHOK MADHAVA RAO Approved as to style and content by . c Norman C. Grisw d (Chair of Committ ) Nasser Kehtarnavaz (Member) g, J~, Karan Watson Robert L. Lytt (Member) Jo W...

Rao, Ashok Madhava

2012-06-07

123

Soil on Phoenix Deck  

NASA Technical Reports Server (NTRS)

This image, taken by the Surface Stereo Imager (SSI) of NASA's Phoenix Lander, shows Martian soil piled on top of the spacecraft's deck and some of its instruments. Visible in the upper-left portion of the image are several wet chemistry cells of the lander's Microscopy, Electrochemistry, and Conductivity Analyzer (MECA). The instrument on the lower right of the image is the Thermal and Evolved-Gas Analyzer. The excess sample delivered to the MECA's sample stage can be seen on the deck in the lower left portion of the image.

This image was taken on Martian day, or sol, 142, on Saturday, Oct. 19, 2008. Phoenix landed on Mars' northern plains on May 25, 2008.

The Phoenix Mission is led by the University of Arizona, Tucson, on behalf of NASA. Project management of the mission is by NASA's Jet Propulsion Laboratory, Pasadena, Calif. Spacecraft development is by Lockheed Martin Space Systems, Denver.

2008-01-01

124

Enhancement of Pavement Maintenance Decision Making by Evaluating the Effectiveness of Pavement Maintenance Treatments.  

E-print Network

??The performance of different pavement maintenance treatments were evaluated by investigating practical projects collected from Tennessee Pavement Management System (PMS) and Long Term Pavement Performance… (more)

Dong, Qiao

2011-01-01

125

Designing Flight Deck Procedures  

NASA Technical Reports Server (NTRS)

Three reports address the design of flight-deck procedures and various aspects of human interaction with cockpit systems that have direct impact on flight safety. One report, On the Typography of Flight- Deck Documentation, discusses basic research about typography and the kind of information needed by designers of flight deck documentation. Flight crews reading poorly designed documentation may easily overlook a crucial item on the checklist. The report surveys and summarizes the available literature regarding the design and typographical aspects of printed material. It focuses on typographical factors such as proper typefaces, character height, use of lower- and upper-case characters, line length, and spacing. Graphical aspects such as layout, color coding, fonts, and character contrast are discussed; and several cockpit conditions such as lighting levels and glare are addressed, as well as usage factors such as angular alignment, paper quality, and colors. Most of the insights and recommendations discussed in this report are transferable to paperless cockpit systems of the future and computer-based procedure displays (e.g., "electronic flight bag") in aerospace systems and similar systems that are used in other industries such as medical, nuclear systems, maritime operations, and military systems.

Degani, Asaf; Wiener, Earl

2005-01-01

126

Interior of the Fisher School Covered Bridge, view to north ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Interior of the Fisher School Covered Bridge, view to north showing road deck, guardrail, and howe truss. - Fisher School Covered Bridge, Crab Creek Road at Fiver Rivers Road, Fisher, Lincoln County, OR

127

10. DECK VIEW FORWARD FROM MAIN DECK TO FORECASTLE. NOTE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

10. DECK VIEW FORWARD FROM MAIN DECK TO FORECASTLE. NOTE PIPE FITTING FOR OIL PUMPING SYSTEM (DISCHARGE). THE HATCH OPENINGS TO RIGHT ARE ABOVE THE SHIP'S BOILER ROOM. - Ship "Falls of Clyde", Hawaii Maritime Center,Pier 7, Honolulu, Honolulu County, HI

128

Experimental pavement delineation treatments  

NASA Astrophysics Data System (ADS)

Visibility and durability of materials used to delineate shoulders and medians adjacent to asphalt pavements were evaluated. Materials evaluated were polysulfide and coal tar epoxies, one and two component polyesters, portland cement, acrylic paints, modified-alkyd traffic paint, preformed plastic tape, and thermoplastic markings. Neat applications, sand mortars, and surface treatments were installed in several geometric patterns including cross hatches, solid median treatments, and various widths of edge lines. Thermoplastic pavement markings generally performed very well, providing good visibility under adverse viewing conditions for at least 4 years. Thermoplastic 4 in. wide edge lines appear to provide adequate visibility for most conditions.

Bryden, J. E.; Lorini, R. A.

1981-06-01

129

Dynamic response of highway girder bridges  

Microsoft Academic Search

The objective of the paper is to investigate the variation of dynamic loading of girder bridges with different girder number and span length due to several vehicles moving across rough bridge decks. Nine girder bridges with girder number ranging from four to eight and span length changing from 40 to 120 ft are designed based on the AASHTO standard highway

Ton-Lo Wang; Dongzhou Huang; Mohsen Shahawy; Kaizan Huang

1996-01-01

130

Pervious Pavement System Evaluation  

EPA Science Inventory

Pervious pavement is a low impact development stormwater control. The Urban Watershed Management Branch of the U.S. Environmental Protection Agency in Edison, NJ, is evaluating concrete pavers as a popular implementation. The pollutant removal of a bench-scale permeable interlo...

131

Pavement performance equations. Final report  

SciTech Connect

The WSDOT PMS data base was used to develop regression equations for three pavement surface types: bituminous surface treatments, asphalt concrete, and portland-cement concrete. The primary regression equations developed were to predict Pavement Condition Rating (PCR) which is a measure of the pavement surface distress (ranges from 100 (no distress) to below 0 (extensive distress)). Overall, the equations fit the data rather well given the expected variation of pavement performance information. The relative effects of age (time since construction or reconstruction) were illustrated for the three surface types.

Mahoney, J.P.; Kay, R.K.; Jackson, N.C.

1988-03-01

132

Bridge afflux analysis through arched bridge constrictions using artificial intelligence methods  

Microsoft Academic Search

Although many studies have been carried out for estimating the afflux through modern straight deck bridge constrictions, little attention has been given to medieval arched bridge constrictions. Hydraulic Research Wallingford in the UK (Brown, P.M., 1988. Afflux at arch bridges. Report SR 182. Wallingford, UK: HR Wallingford) recently published a major coverage of both experimental and field afflux data obtained

Mustafa Mamak; Galip Seckin; Murat Cobaner; Ozgur Kisi

2009-01-01

133

General outlook of pavement and vehicle dynamics  

SciTech Connect

The interaction between vehicle and pavement is complex since pavement roughness excites the dynamic forces generated by vehicles, while these dynamic forces simultaneously increase the pavement roughness. The objective of this paper is to provide an overview of the results of recent research related to pavement and vehicle dynamics and their interaction and to evaluate their potential use in the design and management of pavements. Pavement dynamic models are capable of determining stresses, strains, and deflections in various directions when harmonic, pulse, or transient loads are applied. Vehicle dynamic models simulate the effect of pavement roughness on the inertia of various vehicle components. These models can predict the dynamic forces produced by different axles and wheels of traveling vehicles at different locations along the pavement. Pavement response computed using dynamic models matches field measurements closer than those computed using static models. The concept of vehicle-pavement interaction can be applied to weigh-in-motion, pavement design and performance, and vehicle regulations.

Mamlouk, M.S. [Arizona State Univ., Tempe, AZ (United States). Dept. of Civil and Environmental Engineering

1997-11-01

134

International Symposium on Pavement LCA (Pavement LCA 2014) TRB Co-Sponsored  

E-print Network

International Symposium on Pavement LCA (Pavement LCA 2014) TRB Co-Sponsored (Sustainable Pavements AFD00(1)) FHWA Co-Sponsored (Sustainable Pavement Task Group) Location: UC Davis Campus Conference Assessment (LCA) for pavements. The workshop will be coordinated with activities of the FWHA Sustainable

California at Davis, University of

135

Geotextiles in Flexible Pavement Construction  

ERIC Educational Resources Information Center

People everywhere in the developed world regularly drive on paved roads. Learning about the construction techniques and materials used in paving benefits technology and construction students. This article discusses the use of geosynthetic textiles in pavement construction. It presents background on pavements and describes geotextiles and drainage…

Alungbe, Gabriel D.

2004-01-01

136

Pavement roughness and skid properties  

NASA Astrophysics Data System (ADS)

Road roughness and roadway safety as it relates to both surface and air transportation are discussed. The role of road roughness in vehicle ride, the measurement of roughness, the evaluation of riding confort, and the effect of grooving pavements are discussed. The effects of differential pavement friction on the response of cars in skidding maneuvers is discussed.

137

Summary of Concrete Overlays Existing concrete pavement  

E-print Network

Summary of Concrete Overlays Existing concrete pavement with surface distresses Prepared surface Monolithic pavement with new concrete surface Existing asphalt pavement with surface distresses Milled pavement with asphalt surface distresses Milled and cleaned surface New 2­5 in. (5.1­12.7 cm) bonded

138

Mix Type Selection for Perpetual Pavements  

Microsoft Academic Search

The notion of long-life asphalt pavements or Perpetual Pavements came about in the 1960s, although they were not recognized as such at that time. Using thick layers of HMA was seen as a way of reducing the total section thickness of the pavement. Since then, it has become apparent that this approach to design can lead to asphalt pavements that

David E. Newcomb; Kent R. Hansen

139

On the typography of flight-deck documentation  

NASA Technical Reports Server (NTRS)

Many types of paper documentation are employed on the flight-deck. They range from a simple checklist card to a bulky Aircraft Flight Manual (AFM). Some of these documentations have typographical and graphical deficiencies; yet, many cockpit tasks such as conducting checklists, way-point entry, limitations and performance calculations, and many more, require the use of these documents. Moreover, during emergency and abnormal situations, the flight crews' effectiveness in combating the situation is highly dependent on such documentation; accessing and reading procedures has a significant impact on flight safety. Although flight-deck documentation are an important (and sometimes critical) form of display in the modern cockpit, there is a dearth of information on how to effectively design these displays. The object of this report is to provide a summary of the available literature regarding the design and typographical aspects of printed matter. The report attempts 'to bridge' the gap between basic research about typography, and the kind of information needed by designers of flight-deck documentation. The report focuses on typographical factors such as type-faces, character height, use of lower- and upper-case characters, line length, and spacing. Some graphical aspects such as layout, color coding, fonts, and character contrast are also discussed. In addition, several aspects of cockpit reading conditions such as glare, angular alignment, and paper quality are addressed. Finally, a list of recommendations for the graphical design of flight-deck documentation is provided.

Degani, Asaf

1992-01-01

140

Pavement recycling. Executive summary and report  

SciTech Connect

The Federal Highway Administration (FHWA) initiated Demonstration Project 39 (DP 39) Recycling Asphalt Pavements in June 1976. The project showed that asphalt pavement recycling was a technically viable rehabitation technique, and it was estimated that the use of reclaimed asphalt pavement (RAP) would amount to approximately 15 percent of the total hot-mix asphalt (HMA) production by the mid-1980s. It was expected that most of the asphalt pavement removed would be reused in new pavement construction or overlays.

NONE

1995-10-01

141

17. LOOKING FROM DECK ABOVE MESS UP AT DECK ABOVE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

17. LOOKING FROM DECK ABOVE MESS UP AT DECK ABOVE CO'S STATEROOM. RECTANGULAR WINDOWS IS AT REAR OF PILOT HOUSE. TO RIGHT OF WINDOW IS TOP OF STAIRS TO STARBOARD WING OF FLYBRIDGE. AT EXTREME RIGHT IS ENGINE CONTROLS AND IN BACKGROUND IS COMPASS WITH COVER OVER IT. RIGHT EDGE OF THIS IMAGE IS SAME AS IMAGE 14, JUST OBSTRUCTED IN IMAGE 14 BY LIFE PRESERVER AND SEAT. - U.S. Coast Guard Cutter WHITE LUPINE, U.S. Coast Guard Station Rockland, east end of Tillson Avenue, Rockland, Knox County, ME

142

46 CFR 178.430 - Drainage of well deck vessels.  

Code of Federal Regulations, 2013 CFR

...VESSELS (UNDER 100 GROSS TONS) INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.430 Drainage of well deck vessels. (a) The weather deck on a well deck vessel must be watertight. (b) The area required on...

2013-10-01

143

46 CFR 178.430 - Drainage of well deck vessels.  

Code of Federal Regulations, 2012 CFR

...VESSELS (UNDER 100 GROSS TONS) INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.430 Drainage of well deck vessels. (a) The weather deck on a well deck vessel must be watertight. (b) The area required on...

2012-10-01

144

46 CFR 178.430 - Drainage of well deck vessels.  

Code of Federal Regulations, 2010 CFR

...VESSELS (UNDER 100 GROSS TONS) INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.430 Drainage of well deck vessels. (a) The weather deck on a well deck vessel must be watertight. (b) The area required on...

2010-10-01

145

Aviation Safety Program Integrated Intelligent Flight Deck  

E-print Network

Aviation Safety Program Integrated Intelligent Flight Deck Technical Plan Summary Principal Safety, Integrated Intelligent Flight Deck research project. It contains reference to past work that these two capabilities, safer aircraft and higher capacity airspace systems, fight against each other

146

Recent Innovation for Concrete Highway Bridges  

E-print Network

, Calgary, Alberta) is prestressed by carbon fiber reinforced plastic (CFRP) tendons and instrumented in Manitoba using straight and draped CFRP tendons for prestressing the girder, CFRP stirrups for shear reinforcement. CFRP for flexural reinforcement of the deck slab and GFRP for the bridge curbs. All bridges

147

Green Water on Ship Decks Marilena Greco  

E-print Network

Dam-Breaking (DB) type Dam DB #12;Water-on-Deck Scenarios #12;Water-on-Deck Scenarios Plunging;Water-on-Deck Scenarios Existence diagram Dam-Breaking events Plunging wave plus Dam-Breaking events Hammer-Fist events Plunging-Wave events Marintek (2000) White-Water events #12;3D Model Tests With Fixed

Nørvåg, Kjetil

148

UNIDENTIFIED CATENARY SUSPENSION BRIDGE WITH TRUSSED OBELISK TOWERS ON STONE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

UNIDENTIFIED CATENARY SUSPENSION BRIDGE WITH TRUSSED OBELISK TOWERS ON STONE PIERS, SHOWING HOWE PIPE TRUSS RAILING AND TRUSSED DECK BEAMS TYPICAL TO BRIDGES BUILT BY FLINN-MOYER COMPANY. 3/4 VIEW FROM BELOW. - Clear Fork of Brazos River Suspension Bridge, Spanning Clear Fork of Brazos River at County Route 179, Albany, Shackelford County, TX

149

Dynamic behavior of horizontally curved I-girder bridges  

Microsoft Academic Search

The purpose of this paper is to investigate the dynamic behavior of horizontally curved I-girder bridges due to one or two trucks (side by side) moving across rough bridge decks. The bridge is modeled as a planar grillage beam system composed of horizontally curved beam elements and straight beam elements. Warping torsion is taken into consideration in the analysis. The

Dongzhou Huang; Ton-Lo Wang; Mohsen Shahawy

1995-01-01

150

57. MISSISSIPPI, NOXUBEE CO. MACON MAHORNER'S BRIDGE, 1884, Ms. 14, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

57. MISSISSIPPI, NOXUBEE CO. MACON MAHORNER'S BRIDGE, 1884, Ms. 14, 6 miles to McLeod, 4.5 miles S on McLeod-Shuqualak road. Mahomet's bridge (1884). Detail, lower panel point (pin connection) on west span. View is 45 and from below deck level. - Bridges of the Upper Tombigbee River Valley, Columbus, Lowndes County, MS

151

UNIDENTIFIED CATENARY SUSPENSION BRIDGE ON RIVETED METAL PIERS, SHOWING HOWE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

UNIDENTIFIED CATENARY SUSPENSION BRIDGE ON RIVETED METAL PIERS, SHOWING HOWE PIPE TRUSS RAILING AND TRUSSED DECK BEAMS TYPICAL TO BRIDGES BUILT BY FLINN-MOYER COMPANY. TRIPODAL PIPE TOWERS RESEMBLE CLEAR FORK OF THE BRAZOS SUSPENSION BRIDGE?S TOWERS PRIOR TO ENCASEMENT IN CONCRETE. NOTE COLLAPSED TRUSS IN RIVER. ELEVATION VIEW. - Clear Fork of Brazos River Suspension Bridge, Spanning Clear Fork of Brazos River at County Route 179, Albany, Shackelford County, TX

152

PORTLAND CEMENT CONCRETE PAVEMENT FOR FLEXIBLE OVER RIGID COMPOSITE PAVEMENTS (Tollway)  

E-print Network

PORTLAND CEMENT CONCRETE PAVEMENT FOR FLEXIBLE OVER RIGID COMPOSITE PAVEMENTS (Tollway) Effective portland cement concrete for special applications to composite pavements as shown and described. Developing concrete mix design(s) that meets the performance requirements for the intended pavement; 4

153

Improving a pavement-watering method on the basis1 of pavement surface temperature measurements2  

E-print Network

Improving a pavement-watering method on the basis1 of pavement surface temperature measurements2.hendel@paris.fr)8 Abstract: Pavement-watering has been studied since the 1990's and is currently considered a9 water resource availability problems require that water consumption be optimized. Although11 pavement

Paris-Sud XI, Université de

154

Nondestructive Evaluation of Fiberglass Wrapped Concrete Bridge Columns  

Microsoft Academic Search

Many in-service concrete bridge decks and columns built before the advent of epoxy coated bars show cracking and spalling\\u000a of the concrete due to corrosion of the steel reinforcement. In cold regions, the corrosion rate of concrete bridge decks\\u000a and columns is accelerated by the use of deicing solutions in winter. The corrosion of the steel rebars causes cracking, delamination,

Kyu-Sun Kim; Dante Fratta; José A. Pincheira

2011-01-01

155

of Concrete Pavements Joint PerformanCe  

E-print Network

practitioners under- stand how to optimize concrete pavement joint perfor- mance through the identificationof Concrete Pavements Joint PerformanCe interim Guide for optimum JUNE 2012 #12;#12;Interim Guide for Optimum Joint Performance of Concrete Pavements i Technical Report Documentation Page 1. Report No. 2

156

GEOLOGICAL NOTE Desert Pavement: An Environmental Canary?  

E-print Network

GEOLOGICAL NOTE Desert Pavement: An Environmental Canary? P K. Haft Division of Earth and Ocean 27708 Ie-mail: /wff@geo.duke_eciul ABSTRACT Ongoing ctisruption of ancient, varnished desert pavement that the pavement disturbances reported here ~ue rarc on the millcnnhll time scale of desert varnish format ion

Ahmad, Sajjad

157

Impact of pavement conditions on crash severity.  

PubMed

Pavement condition has been known as a key factor related to ride quality, but it is less clear how exactly pavement conditions are related to traffic crashes. The researchers used Geographic Information System (GIS) to link Texas Department of Transportation (TxDOT) Crash Record Information System (CRIS) data and Pavement Management Information System (PMIS) data, which provided an opportunity to examine the impact of pavement conditions on traffic crashes in depth. The study analyzed the correlation between several key pavement condition ratings or scores and crash severity based on a large number of crashes in Texas between 2008 and 2009. The results in general suggested that poor pavement condition scores and ratings were associated with proportionally more severe crashes, but very poor pavement conditions were actually associated with less severe crashes. Very good pavement conditions might induce speeding behaviors and therefore could have caused more severe crashes, especially on non-freeway arterials and during favorable driving conditions. In addition, the results showed that the effects of pavement conditions on crash severity were more evident for passenger vehicles than for commercial vehicles. These results provide insights on how pavement conditions may have contributed to crashes, which may be valuable for safety improvement during pavement design and maintenance. Readers should notice that, although the study found statistically significant effects of pavement variables on crash severity, the effects were rather minor in reality as suggested by frequency analyses. PMID:23892046

Li, Yingfeng; Liu, Chunxiao; Ding, Liang

2013-10-01

158

Overview of the Arizona Quiet Pavement Program  

Microsoft Academic Search

The Arizona Quiet Pavement Pilot Program (QP3) was initially implemented to reduce highway related traffic noise by overlaying most of the Phoenix metropolitan area Portland cement concrete pavement with a one inch thick asphalt rubber friction coarse. With FHWA support, this program represents the first time that pavement surface type has been allowed as a noise mitigation strategy on federally

Paul Donavan; Larry Scofield

2005-01-01

159

Analytical study on flutter suppression by eccentric mass method on FEM model of long-span suspension bridge  

Microsoft Academic Search

A method of suppression of flutter in long-span bridges based on the concept of eccentric mass is presented in this paper. The auxiliary mass is placed on the windward side of a bridge deck to shift the center of gravity, and thus, the aerodynamic moment acting on the deck is reduced, resulting in an increase in the flutter wind speed.

S. Phongkumsing; K. Wilde; Y. Fujino

2001-01-01

160

Multiplexed Bragg grating optical fiber sensors for damage evaluation in highway bridges  

Microsoft Academic Search

A multiplexed Bragg grating optical fiber monitoring system is designed and integrated at the construction stage in an experimental full scale laboratory bridge. The test bridge is a 40 ft span non-composite steel girder concrete deck bridge. The network of sensors is used to measure the strain throughout the bridge, with sensors bonded to the tension steel in the slab

R. L. Idriss; M. B. Kodindouma; A. D. Kersey; M. A. Davis

1998-01-01

161

Pavement roughness on expansive clays  

E-print Network

PAVEMENT ROUGHI'JESS ON EXPANSIVE CLAYS A Thesis by Manuel Oli van Velasco Submitted to the Graduate College Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE December 1980 Major Subject...: Civil Engineerina PAVEMENT ROUGHNESS ON EXPANSIVE CLAYS A Thesis by Manuel Olivan Velasco Approved as to style and content by: R t L. L ton ? Chairm Wayne A. nlap - Member Luis F. Costa - Member ames F. Slowey - Member Donald McDonald - Head...

Velasco, Manuel O

2012-06-07

162

29 CFR 1918.36 - Weather deck rails.  

Code of Federal Regulations, 2010 CFR

... 7 2010-07-01 2010-07-01 false Weather deck rails. 1918.36 Section 1918.36...LONGSHORING Working Surfaces § 1918.36 Weather deck rails. Removable weather deck rails shall be kept in place except when...

2010-07-01

163

29 CFR 1918.36 - Weather deck rails.  

Code of Federal Regulations, 2012 CFR

... 7 2012-07-01 2012-07-01 false Weather deck rails. 1918.36 Section 1918.36...LONGSHORING Working Surfaces § 1918.36 Weather deck rails. Removable weather deck rails shall be kept in place except when...

2012-07-01

164

46 CFR 108.167 - Weather deck ladders.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Weather deck ladders. 108.167 Section 108...Arrangement Means of Escape § 108.167 Weather deck ladders. Each unit must have...permanent, inclined ladder between each weather deck. Classified...

2011-10-01

165

46 CFR 108.167 - Weather deck ladders.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Weather deck ladders. 108.167 Section 108...Arrangement Means of Escape § 108.167 Weather deck ladders. Each unit must have...permanent, inclined ladder between each weather deck. Classified...

2010-10-01

166

46 CFR 108.167 - Weather deck ladders.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Weather deck ladders. 108.167 Section 108...Arrangement Means of Escape § 108.167 Weather deck ladders. Each unit must have...permanent, inclined ladder between each weather deck. Classified...

2013-10-01

167

29 CFR 1918.36 - Weather deck rails.  

Code of Federal Regulations, 2011 CFR

... 7 2011-07-01 2011-07-01 false Weather deck rails. 1918.36 Section 1918.36...LONGSHORING Working Surfaces § 1918.36 Weather deck rails. Removable weather deck rails shall be kept in place except when...

2011-07-01

168

29 CFR 1918.36 - Weather deck rails.  

Code of Federal Regulations, 2013 CFR

... 7 2013-07-01 2013-07-01 false Weather deck rails. 1918.36 Section 1918.36...LONGSHORING Working Surfaces § 1918.36 Weather deck rails. Removable weather deck rails shall be kept in place except when...

2013-07-01

169

46 CFR 108.167 - Weather deck ladders.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Weather deck ladders. 108.167 Section 108...Arrangement Means of Escape § 108.167 Weather deck ladders. Each unit must have...permanent, inclined ladder between each weather deck. Classified...

2012-10-01

170

California DOT 1. Briefly summarize your current pavement smoothness requirements.  

E-print Network

California DOT 1. Briefly summarize your current pavement smoothness requirements. For HMA pavement to OGFC placed on existing pavement not constructed under the same project. If concrete pavement is placed ordered. 39-1.12B Straightedge The top layer of HMA pavement must not vary from the lower edge of a12-foot

171

Guide Specification for Highway Construction Texturing Concrete Pavement for  

E-print Network

Guide Specification for Highway Construction Texturing Concrete Pavement for Reduced Tire/Pavement Noise using Diamond Grinding Designation: CPSCP GS 1-11 (rev 3/1/2011) National Concrete Pavement for Highway Construction Texturing Concrete Pavement for Reduced Tire/Pavement Noise using Diamond Grinding

172

12. DETAIL VIEW OF BRIDGE, SHOWING SPRING LINE OF SPANS ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

12. DETAIL VIEW OF BRIDGE, SHOWING SPRING LINE OF SPANS FROM CROWN OF MID-CHANNEL PIER, PAIRED COLUMNS SUPPORTING DECK, ARCHED WINDOW RAILING, LOOKING WEST-NORTHWEST FROM EUREKA SOUTHERN RAILROAD BRIDGE. CABLES VISIBLE IN BACKGROUND ARE EARTHQUAKE RESTRAINERS RETROFITTED TO 1952 HIGHWAY BRIDGE, WHICH FUNCTIONED AS DESIGNED IN APRIL 1992 TEMBLOR - Van Duzen River Bridge, Spanning Van Duzen River at CA State Highway 101, Alton, Humboldt County, CA

173

UNIDENTIFIED CATENARY SUSPENSION BRIDGE WITH TRIPLE PIPE TOWERS, SHOWING HOWE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

UNIDENTIFIED CATENARY SUSPENSION BRIDGE WITH TRIPLE PIPE TOWERS, SHOWING HOWE PIPE TRUSS RAILING AND TRUSSED DECK BEAMS TYPICAL TO BRIDGES BUILT BY FLINN-MOYER COMPANY. NOTE THAT TOWER PIPES LIE IN ONE PLANE, UNLIKE TRIPODAL ARRANGEMENT AT CLEAR FORK OF THE BRAZOS SUSPENSION BRIDGE. ELEVATION VIEW. - Clear Fork of Brazos River Suspension Bridge, Spanning Clear Fork of Brazos River at County Route 179, Albany, Shackelford County, TX

174

The Concrete and Pavement Challenge  

ERIC Educational Resources Information Center

The modern world is characterized by the extensive use of concrete and asphalt pavement. Periodically, these materials are replaced and the old materials disposed of. In this challenge, students will be asked to develop ways to reuse the old materials. It is important for students to understand how concrete and asphalt are made and applied, as…

Roman, Harry T.

2012-01-01

175

Review of permeable pavement systems  

Microsoft Academic Search

The purpose of this review paper is to summarise the wide-range but diffuse literature on predominantly permeable pavement systems (PPS), highlight current trends in research and industry, and to recommend future areas of research and development. The development of PPS as an integral part of sustainable drainage systems is reviewed in the context of traditional and modern urban drainage. Particular

Miklas Scholz; Piotr Grabowiecki

2007-01-01

176

Nondestructive Evaluation of Pavements Ultrasonic  

E-print Network

Nondestructive Evaluation of Pavements Ð Ultrasonic Tomography Kyle Hoegh, Graduate Student Dr. Lev:// pavementndt.weebly.com #12;Outline ·! Ultrasonic Tomography Overview ·! Georgia Example ·! MnROAD ­!Joint.weebly.com #12;Ultrasonic Methods: Pros and Cons ·! Advantages ­! Multiple applications ·! Thickness

Minnesota, University of

177

Pavement Smoothness for Illinois DOT -Doug Dirks 1. Briefly summarize your current pavement smoothness requirements. See below.  

E-print Network

Pavement Smoothness for Illinois DOT - Doug Dirks 1. Briefly summarize your current pavement? N/A Illinois has both standard specifications and a special provision for pavement smoothness-Depth HMA pavements, and PCC Pavements are all included in this special provision. http

178

Bituminous pavement recycling Aravind K. and Animesh Das  

E-print Network

Bituminous pavement recycling Aravind K. and Animesh Das Department of Civil Engineering IIT Kanpur Introduction The bituminous pavement rehabilitation alternatives are mainly overlaying, recycling and reconstruction. In the recycling process the material from deteriorated pavement, known as reclaimed asphalt

Das, Animesh

179

Rutting and drainage design methodology for a concrete block pavement  

E-print Network

Concrete block pavements (CBP) have historically been hics. used in low trafficked applications as an alternative to asphalt and concrete pavement because of their aesthetic quality. However, concrete block pavements have not been used for high...

Poduska, Daryl Jason

2012-06-07

180

Pervious Pavement A Strategic Plan For NYC DOT  

E-print Network

Pervious Pavement A Strategic Plan For NYC DOT Presented By: Rene Brana Spring 2012 Capstone: Pervious Pavement - A Strategic Plan for NYC DOT 2 Capstone: Pervious Pavement - A Strategic Plan for NYC DOT 3 Image courtesy of

Qian, Ning

181

CLEAR FORK OF THE BRAZOS SUSPENSION BRIDGE, CIRCA 1896, SHOWING ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

CLEAR FORK OF THE BRAZOS SUSPENSION BRIDGE, CIRCA 1896, SHOWING INCLINED STAY CABLES EXTENDING FROM TOP OF TOWER TO DECK. 3/4 VIEW FROM BELOW. - Clear Fork of Brazos River Suspension Bridge, Spanning Clear Fork of Brazos River at County Route 179, Albany, Shackelford County, TX

182

15. BRIDGE TENDER ALBERT REEVES OF MAURICETOWN AND HELPER WALLY ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

15. BRIDGE TENDER ALBERT REEVES OF MAURICETOWN AND HELPER WALLY HALES HOLDING HUGE KEY ABOVE HOLE IN DECK OF CENTER SWING SPAN TO REVEAL KEY BASETHE KEY IS SET UPON A MALE FITTING USED TO OPEN THE SPAN - Maurice River Pratt Through-Truss Swing Bridge, Spanning Maurice River, Mauricetown, Cumberland County, NJ

183

UNIDENTIFIED CATENARY SUSPENSION BRIDGE, SHOWING COMPLETED SINGLE PIPE TOWERS, WOODEN ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

UNIDENTIFIED CATENARY SUSPENSION BRIDGE, SHOWING COMPLETED SINGLE PIPE TOWERS, WOODEN DECK LAID OVER LONGITUDINAL CABLES, AND WIRES READY FOR CABLE SPINNING. NOTE WORKER IN LEFT FOREGROUND STANDING IN ANCHORAGE PIT. BARREL VIEW. - Clear Fork of Brazos River Suspension Bridge, Spanning Clear Fork of Brazos River at County Route 179, Albany, Shackelford County, TX

184

Markovian & Weibull Approach to Concrete Pavement Monitoring  

E-print Network

­ Impervious Concrete Pavement 402 kPa 583 kPa 779 kPa #12;#12;Skid Resistance 0 10 20 30 40 50 60 70 4-Jun-09Markovian & Weibull Approach to Concrete Pavement Monitoring Bernard Igbafen Izevbekhai, P.E., Ph) Sensor Location (mm) MnROAD Cell 85 : Pervious Concrete Pavement 393 kPa 574 kPa 789 kPa 0 20 40 60 80

Minnesota, University of

185

Storebælt suspension bridge – vortex shedding excitation and mitigation by guide vanes  

Microsoft Academic Search

During the final phases of deck erection and surfacing of the suspended spans of the Storebælt bridge, vertical deck oscillations of low frequency were observed by workers and supervision staff. The results of on-site monitoring of the oscillations and wind speed measurements at the nearby island of Sprogø correlated well with wind-tunnel test results obtained during design, indicating that the

Allan Larsen; Søren Esdahl; Jacob E Andersen; Tina Vejrum

2000-01-01

186

Basic Bridge Math Question 1: How many bridge hands are there? That is, how many ways are there of selecting  

E-print Network

Basic Bridge Math Question 1: How many bridge hands are there? That is, how many ways are there of selecting 13 cards from a deck of 52? No problem -- just start listing all the possible hands! Just kidding to do with their time. There must be a better way to count hands without listing every single one

Martin, Jeremy L.

187

TAYLOR BRIDGE -FIELD ASSESSMENT Doug STEWARTi  

E-print Network

of the Taylor Bridge were prestressed by two different types of carbon fibre reinforced polymer (CFRP) material using straight and draped tendons, as shown in Figure 2. The girders were also reinforced by CFRP of the deck slab is reinforced by CFRP reinforcement. Glass fibre reinforced polymer (GFRP) was also used

188

The Effectiveness of Hot-deck Procedures in Small Samples.  

ERIC Educational Resources Information Center

A simulation study was conducted to identify the best hot-deck variation to impute missing values. The three variations included in the study were the hot-deck random, the hot-deck sequential, and the hot-deck distance. The properties of these methods were investigated under three levels of the proportion of incomplete records and four levels…

Kaiser, Javaid

189

46 CFR 69.111 - Between-deck tonnage.  

Code of Federal Regulations, 2011 CFR

...If the uppermost complete deck runs in a continuous line from stem to stern, the line of the uppermost complete deck is the longitudinal...If the uppermost complete deck runs at different levels from stem to stern, the line of the uppermost complete deck is...

2011-10-01

190

46 CFR 178.410 - Drainage of flush deck vessels.  

Code of Federal Regulations, 2010 CFR

...GROSS TONS) INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.410 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel must be watertight and have...

2010-10-01

191

46 CFR 116.1110 - Drainage of flush deck vessels.  

Code of Federal Regulations, 2011 CFR

...CONSTRUCTION AND ARRANGEMENT Drainage and Watertight Integrity of Weather Decks § 116.1110 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel must be watertight and have...

2011-10-01

192

46 CFR 116.1110 - Drainage of flush deck vessels.  

Code of Federal Regulations, 2010 CFR

...CONSTRUCTION AND ARRANGEMENT Drainage and Watertight Integrity of Weather Decks § 116.1110 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel must be watertight and have...

2010-10-01

193

46 CFR 178.410 - Drainage of flush deck vessels.  

Code of Federal Regulations, 2012 CFR

...GROSS TONS) INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.410 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel must be watertight and have...

2012-10-01

194

46 CFR 116.1110 - Drainage of flush deck vessels.  

Code of Federal Regulations, 2012 CFR

...CONSTRUCTION AND ARRANGEMENT Drainage and Watertight Integrity of Weather Decks § 116.1110 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel must be watertight and have...

2012-10-01

195

46 CFR 116.1110 - Drainage of flush deck vessels.  

Code of Federal Regulations, 2013 CFR

...CONSTRUCTION AND ARRANGEMENT Drainage and Watertight Integrity of Weather Decks § 116.1110 Drainage of flush deck vessels. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel must be watertight and have...

2013-10-01

196

The evaluation of airfield pavements  

E-print Network

for the multiple-wheel assembly, because the stress patterns do not over- lap appreciably at shallow depths, ? Wheel Load -- ? ? Pavement Base Pressure Distribution ? Subgrade Figure 2. Distribution of Pressure Produced by a Single Wheel Load ? Thin... loading conditions. It is an accepted theorem of the engineering profession that the value and accuracy of a test procedure is directly related to how well the test corresponds to field conditions. It is easily seen that bearing values obtained...

Poor, Arthur Reginald

2012-06-07

197

Adaptive prediction of pavement performance  

E-print Network

Zulyaminayn, B. S, Bangladesh University of Engineering and Technology Chair of Advisory Committee Dr Roger E. Smith A Visual Basic 60 computer program for adjusting family performance curves in TM making reasonable predictions of individual pavement..., in years, and alpha, a horizontal asymptote factor that controls the maximum range of distress growth or ride loss, base of the natural logarithms (e = 2. 71828. . . ), chi, a weighting factor that controls performance, epsilon, a climate weightmg...

Zulyaminayn, Mohammed

2012-06-07

198

CFD VERIFICATION OF AERODYNAMIC DEVICES PERFORMANCE FOR THE MESSINA STRAIT BRIDGE  

Microsoft Academic Search

Aerodynamic design of bridge deck sections is a key issue in order to guarantee a feasible performance of wind prone bridges. For years, experimental tests of the proposed Messina Strait Bridge have been carried out in the wind tunnel facilities of the Politecnico di Milano. Those exhaustive and detailing testing campaigns have allowed the identification of potential problems related with

Félix Nieto; Alberto Zasso; Daniele Rocchi; Santiago Hernández

199

DUCTILE END-DIAPHRAGMS TO SEISMICALLY RETROFIT SHORT AND MEDIUM SPAN STEEL BRIDGES  

E-print Network

DUCTILE END-DIAPHRAGMS TO SEISMICALLY RETROFIT SHORT AND MEDIUM SPAN STEEL BRIDGES Michel BRUNEAU 6N5 Summary A seismic retrofit strategy using ductile steel bridge end-diaphragms is presented here calibrated to yield before the strength of the substructure (and superstructure for deck-truss bridges

Bruneau, Michel

200

ACOUSTIC EMISSION HEALTH MONITORING OF STEEL BRIDGES Pooria L. Pahlavan1  

E-print Network

ACOUSTIC EMISSION HEALTH MONITORING OF STEEL BRIDGES Pooria L. Pahlavan1 , Joep Paulissen2 of AE systems for large-scale bridges is hindered by limitations associated with instrumentation costs in the utilization of AE systems for steel bridge decks. These challenges are mainly related to the multi

Boyer, Edmond

201

Resource management on the flight deck. [conferences  

NASA Technical Reports Server (NTRS)

Several approaches to the training and selection of aircrew are presented including both industry and nonindustry perspectives. Human factor aspects of the problem are also examined with specific emphasis on the psychology of the flight deck situation.

Cooper, G. E. (editor); White, M. D. (editor); Lauber, J. K. (editor)

1980-01-01

202

Definition of the 2005 flight deck environment  

NASA Technical Reports Server (NTRS)

A detailed description of the functional requirements necessary to complete any normal commercial flight or to handle any plausible abnormal situation is provided. This analysis is enhanced with an examination of possible future developments and constraints in the areas of air traffic organization and flight deck technologies (including new devices and procedures) which may influence the design of 2005 flight decks. This study includes a discussion on the importance of a systematic approach to identifying and solving flight deck information management issues, and a description of how the present work can be utilized as part of this approach. While the intent of this study was to investigate issues surrounding information management in 2005-era supersonic commercial transports, this document may be applicable to any research endeavor related to future flight deck system design in either supersonic or subsonic airplane development.

Alter, K. W.; Regal, D. M.

1992-01-01

203

Highway pavement distress evaluation: Modeling measurement error  

Microsoft Academic Search

There has been a proliferation of inspection technologies to quantify distresses on highway pavement systems. These technologies employ varying measurement principles and are subject to measurement errors. Estimates of measurement errors are therefore required in order to select among these techniques, and to get accurate assessments of pavement condition. There is abundant literature concerning techniques available for the numerical study

Frannie Humplick

1992-01-01

204

Analysis and design optimization of flexible pavement  

SciTech Connect

A project-level optimization approach was developed to minimize total pavement cost within an analysis period. Using this approach, the designer is able to select the optimum initial pavement thickness, overlay thickness, and overlay timing. The model in this approach is capable of predicting both pavement performance and condition in terms of roughness, fatigue cracking, and rutting. The developed model combines the American Association of State Highway and Transportation Officials (AASHTO) design procedure and the mechanistic multilayer elastic solution. The Optimization for Pavement Analysis (OPA) computer program was developed using the prescribed approach. The OPA program incorporates the AASHTO equations, the multilayer elastic system ELSYM5 model, and the nonlinear dynamic programming optimization technique. The program is PC-based and can run in either a Windows 3.1 or a Windows 95 environment. Using the OPA program, a typical pavement section was analyzed under different traffic volumes and material properties. The optimum design strategy that produces the minimum total pavement cost in each case was determined. The initial construction cost, overlay cost, highway user cost, and total pavement cost were also calculated. The methodology developed during this research should lead to more cost-effective pavements for agencies adopting the recommended analysis methods.

Mamlouk, M.S.; Zaniewski, J.P.; He, W.

2000-04-01

205

Fractionation of heavy metals in pavement runoff  

Microsoft Academic Search

Abstract The transport of anthropogenic constituents by runoff from urban roadways can adversely impact the quality of adjacent receiving waters and soils. Metal elements are the most,persistent constituents found in pavement,runoff. A section of urban highway pavement in Cincinnati, Ohio, USA with an average daily traffic count of 150 000 vehicles was instrumented to sample lateral sheet flow from the

John J. Sansalone; Steven G. Buchberger; Souhail R. Al-abed

1996-01-01

206

STONE PAVEMENTS IN DESERTS! RONALD U. COOKE  

E-print Network

STONE PAVEMENTS IN DESERTS! RONALD U. COOKE ABSTRACT. Stone pavenlents are armored surfaces compnsing intricate mosaics of coarse particles, usually only one or two stones thick, set on or in fine processes, nlay vary greatly from place to place. STONE pavements are defined as armored surfaces comprising

Ahmad, Sajjad

207

Concrete Pavement Sustainability Sustainability Track Leadership  

E-print Network

#12;What Else is Happening? · FHWA advocating "Green Paving" technologies ­ Recycled concrete, twoTrack 13: Concrete Pavement Sustainability #12;Sustainability Track Leadership Committee Members package for concrete pavement sustainability (initiated1/10) · A conference on sustainability of concrete

208

Predicting pavement distress in oil field areas  

SciTech Connect

A study on oil field traffic characteristics was performed and a procedure was developed for assessing current and future effects of oil field truck traffic on surface-treated (stage construction type) pavements. A computer program calculates several types of pavement distress and serviceability parameters to evaluate pavement performance under various axle load repetitions. Stepwise regression analysis of 132 surface-treated pavement sections led to the development of individual distress equations for rutting, raveling, flushing, alligator cracking, patching, longitudinal and transverse cracking, and failures (potholes). The versatility of the program provides a means of anticipating early pavement failures due to increased axle load repetitions. The program also provides the basic framework for computing the effects of other ''special-use'' truck traffic demands.

Mason, J.M.; Scullion, T.; Stampley, B.E.

1983-05-01

209

Predicting pavement distress in oil field areas  

SciTech Connect

A study on oil field traffic characteristics was performed and a procedure was developed for assessing current and future effects of oil field truck traffic on surface-treated (stage construction type) pavements. A computer program calculates several types of pavement distress and serviceability parameters to evaluate pavement performance under various axle load repetitions. Stepwise regression analysis of 132 surface-treated pavement sections led to the development of individual distress equations for rutting, raveling, flushing, alligator cracking, patching, longitudinal and transverse cracking, and failures (potholes). The versatility of the program provides a means of anticipating early pavement failures due to increased axle load repetitions. The program also provides the basic framework for computing the effects of other ''special-use'' truck traffic demands.

Mason, J.M.; Scullion, T.; Stampley, B.E.

1984-05-01

210

1 INTRODUCTION A typical flexible pavement system includes four  

E-print Network

1 INTRODUCTION A typical flexible pavement system includes four distinct layers: asphalt concrete course in order to reduce costs or to minimize capil- lary action under the pavement. Figure 1: Cross-section of flexible pavement system (Muench 2006) Pavement distress may occur due to either traffic or environmental

Zornberg, Jorge G.

211

New Developments in the Debate on Pavement-Vehicle  

E-print Network

New Developments in the Debate on Pavement-Vehicle Interaction: The Impact of Pavement Design aerodynamics Improve energy efficiency Reduce rolling resistance, including pavement-vehicle interaction #12 standards for big trucks" February 18, 2014 What about fuel efficiency standards for pavements? #12;Slide 5

de Weck, Olivier L.

212

RESEARCH Open Access Pavement crack characteristic detection based  

E-print Network

RESEARCH Open Access Pavement crack characteristic detection based on sparse representation Xiaoming Sun1 , Jianping Huang1 , Wanyu Liu1* and Mantao Xu2 Abstract Pavement crack detection plays an important role in pavement maintaining and management. The three- dimensional (3D) pavement crack detection

Joensuu, University of

213

TEXAS PAVEMENT PRESERVATION CENTER FOUR-YEAR SUMMARY REPORT  

E-print Network

TEXAS PAVEMENT PRESERVATION CENTER FOUR-YEAR SUMMARY REPORT Dr. Yetkin Yildirim, P.E., TPPC Director E-mail: yetkin@mail.utexas.edu Mailing address: Texas Pavement Preservation Center Center................................................................................................ 100 #12;#12;TEXAS PAVEMENT PRESERVATION CENTER (TPPC) About the Center The Texas Pavement Preservation

Texas at Austin, University of

214

Field performance of geosynthetic reinforced pavements over expansive clay subgrades  

E-print Network

cracks on the pavement structures. Traditionally the problems related to flexible pavements over flexible pavements. 1 INTRODUCTION Basal reinforcement of pavement systems has been used for the purposes of the soil in the vicinity of the pave- ment shoulders (Figure 1a). This leads to settlements in the shoulder

Zornberg, Jorge G.

215

23 CFR 971.208 - Federal lands pavement management system (PMS).  

Code of Federal Regulations, 2010 CFR

... Federal lands pavement management system (PMS). In addition...the AASHTO's “Pavement Management Guide.” 1 1 “Pavement Management Guide,” AASHTO...nature of the transportation network. These different...

2010-04-01

216

Improving rutting resistance of pavement structures using geosynthetics: an overview.  

PubMed

A pavement structure consists of several layers for the primary purpose of transmitting and distributing traffic loads to the subgrade. Rutting is one form of pavement distresses that may influence the performance of road pavements. Geosynthetics is one type of synthetic materials utilized for improving the performance of pavements against rutting. Various studies have been conducted on using different geosynthetic materials in pavement structures by different researchers. One of the practices is a reinforcing material in asphalt pavements. This paper intends to present and discuss the discoveries from some of the studies on utilizing geosynthetics in flexible pavements as reinforcement against permanent deformation (rutting). PMID:24526919

Mirzapour Mounes, Sina; Karim, Mohamed Rehan; Khodaii, Ali; Almasi, Mohammad Hadi

2014-01-01

217

Road Materials and Pavements Design. Volume X No X/2009, pages 1 to 16 Pavement Design for Curved Road Sections  

E-print Network

Road Materials and Pavements Design. Volume X ­ No X/2009, pages 1 to 16 Pavement Design for Curved pavements Christophe Petit* -- Malick Diakhaté* -- Anne Millien* -- Annabelle Phelipot-Mardelé* -- Bertrand@eurovia.com ABSTRACT. This paper focuses on damage processes other than the main one observed and studied in pavement

Paris-Sud XI, Université de

218

Modeling and experimental testing of a smart composite bridge  

NASA Astrophysics Data System (ADS)

An all composite bridge with integral sensor network has been designed and built at the University of Missouri-Rolla (UMR). An extensive experimental study and finite element analysis were carried out to obtain and compare properties (stiffness, strength, failure modes) of 76 mm (3 in) square hollow pultruded Fiber Reinforced Polymer (FRP) tubes and their assemblies. Tube assemblies were used in the fabrication of bridge deck designed for H-20 truckloads as specified by the American Association of State Highway and Transportation Officials (AASHTO). The bridge is 9.14 m (30 ft) long and is 2.74 m (9 ft) wide. All the coupons were tested under three- or four-point bending. Experimental results show excellent linear elastic behavior up to failure and are in good agreement with finite element solutions. A quarter portion of the full-sized bridge deck was then tested for its structural performance under design and fatigue loading and also for ultimate load capacity to evaluate the bridge response. The characteristics of the full-size bridge deck were determined by analyzing the performed tests. The test sample showed almost no reduction in stiffness or strength after 2 million cycles of fatigue loading in excess of the design load. The bridge was installed at the UMR campus in July 2000. The bridge is equipped with fiber optic sensors, and the response of the bridge will be remotely monitored.

Chandrashekhara, K.; Nanni, Antonio; Watkins, Steve E.; Kumar, Prakash

2003-10-01

219

Calculations in bridge aeroelasticity via CFD  

SciTech Connect

The central focus of the present study is the numerical calculation of flutter derivatives. These aeroelastic coefficients play an important role in determining the stability or instability of long, flexible structures under ambient wind loading. A class of Civil Engineering structures most susceptible to such an instability are long-span bridges of the cable-stayed or suspended-span variety. The disastrous collapse of the Tacoma Narrows suspension bridge in the recent past, due to a flutter instability, has been a big impetus in motivating studies in flutter of bridge decks.

Brar, P.S.; Raul, R.; Scanlan, R.H. [Johns Hopkins Univ., Baltimore, MD (United States)

1996-12-31

220

23 CFR 972.208 - Federal lands pavement management system (PMS).  

Code of Federal Regulations, 2010 CFR

... Federal lands pavement management system (PMS). In addition...the AASHTO's “Pavement Management Guide.”2 2 “Pavement Management Guide,” AASHTO...the nature of the pavement network. These different...

2010-04-01

221

Long Term Monitoring of Moisture Under Pavements.  

National Technical Information Service (NTIS)

Monitoring of the environmental instrumentation installed under select pavement sections constructed by the Ohio Department of Transportation (ODOT) in 1995 on US 23 in Delaware County, Ohio was continued. The measurements made consisted of soil moisture,...

J. Howdyshell, T. Butalia, W. Wolfe

2010-01-01

222

Innovations in Pavement Recycling Session CTS Conference  

E-print Network

of rehabilitation #12;#12;Obliterating existing pavement distresses & joints #12;Grid roller #12;Pneumatic & smooth drains "! New CL culverts !! Grade corrections !! Over 80,000 SY of pcc rubblized in 7 days #12

Minnesota, University of

223

Permeable Pavements, Green Roofs, and Cisterns  

E-print Network

asphalt and concrete, which are completely impervious surfaces. Permeable pavements allow water site features, reduc- monplace throughout North Carolina, ing and disconnecting impervious cover concrete, pervious asphalt, permeable interlocking concrete pavers (PICPs), concrete grid pavers

Hunt, William F.

224

Improvements to a Transport Model of Asphalt Binder Oxidation in Pavements: Pavement Temperature Modeling, Oxygen Diffusivity in Asphalt Binders and Mastics, and Pavement Air Void Characterization  

E-print Network

in pavements. In this model, oxygen transport and reaction were described mathematically as two interlinked steps: 1) diffusion and/or flow of oxygen from the atmosphere above the pavement into the interconnected air voids in the pavement; and 2) diffusion...

Han, Rongbin

2012-07-16

225

TIME–FREQUENCY ANALYSIS OF A SUSPENSION BRIDGE BASED ON GPS  

Microsoft Academic Search

This paper describes the results obtained from full-scale measurements of Humen bridge, which is the second longest suspension bridge in China. A real-time kinematic (RTK) global positioning system (GPS) has been developed and installed on the Humen bridge for on-line monitoring of bridge deck movements. The field wind-induced vibration data were measured by this monitoring system. Three system identification techniques

L. Xu; J. J. Guo; J. J. Jiang

2002-01-01

226

PCC Pavement Sustainability in New York Economy, Environment, and Society: 2 Out of 3 is Easy  

E-print Network

PCC Pavement Sustainability in New York Economy, Environment, and Society: 2 Out of 3 is Easy Bill PCC pavement sustainability strategy. NYSDOT recognizes that PCC pavements have "sustainable efforts, begging the question, "Is any pavement truly "sustainable?"" 1. PCC pavements, and pavement

227

Incorporating inspection decisions in pavement management  

Microsoft Academic Search

Pavement management systems need to address not only maintenance and rehabilitation (M&R) decisions, but also facility inspection decisions. The state of the art in pavement management is lacking of any consistent methodology for making such decisions on a cost-effectiveness basis. Such a methodology must recognize the presence of interactions between M&R and inspection decisions. These interactions argue for a joint

Samer Madanat

1993-01-01

228

Automatic inspection of pavement cracking distress  

Microsoft Academic Search

We present an image processing algorithm customized for high-speed, real-time inspection of pavement cracking. In the algorithm, a pavement image is divided into grid cells of 8×8 pixels, and each cell is classified as a noncrack or crack cell using the grayscale information of the border pixels. Whether a crack cell can be regarded as a basic element (or seed)

Yaxiong Huang; Bugao Xu

2006-01-01

229

46 CFR 12.15-13 - Deck engine mechanic.  

Code of Federal Regulations, 2012 CFR

... 2012-10-01 false Deck engine mechanic. 12.15-13 Section 12.15-13...Department § 12.15-13 Deck engine mechanic. (a) An applicant for an endorsement as deck engine mechanic shall be a person holding an MMC...

2012-10-01

230

46 CFR 12.15-13 - Deck engine mechanic.  

Code of Federal Regulations, 2010 CFR

... 2010-10-01 false Deck engine mechanic. 12.15-13 Section 12.15-13...Department § 12.15-13 Deck engine mechanic. (a) An applicant for an endorsement as deck engine mechanic shall be a person holding an MMC...

2010-10-01

231

46 CFR 12.15-13 - Deck engine mechanic.  

Code of Federal Regulations, 2011 CFR

... 2011-10-01 false Deck engine mechanic. 12.15-13 Section 12.15-13...Department § 12.15-13 Deck engine mechanic. (a) An applicant for an endorsement as deck engine mechanic shall be a person holding an MMC...

2011-10-01

232

46 CFR 12.15-13 - Deck engine mechanic.  

Code of Federal Regulations, 2013 CFR

... 2013-10-01 false Deck engine mechanic. 12.15-13 Section 12.15-13...Department § 12.15-13 Deck engine mechanic. (a) An applicant for an endorsement as deck engine mechanic shall be a person holding an MMC...

2013-10-01

233

29 CFR 1918.36 - Weather deck rails.  

...2014-07-01 2014-07-01 false Weather deck rails. 1918.36 Section 1918.36 Labor Regulations... Working Surfaces § 1918.36 Weather deck rails. Removable weather deck rails shall be kept in place except when cargo...

2014-07-01

234

46 CFR 190.10-45 - Weather deck communications.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Weather deck communications. 190.10-45... Means of Escape § 190.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent inclined...

2010-10-01

235

46 CFR 173.062 - Drainage of weather deck.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Drainage of weather deck. 173.062 Section 173.062 Shipping...VESSEL USE School Ships § 173.062 Drainage of weather deck. The weather deck of each sailing school vessel must be...

2011-10-01

236

46 CFR 72.10-45 - Weather deck communications.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Weather deck communications. 72.10-45...ARRANGEMENT Means of Escape § 72.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent...

2013-10-01

237

46 CFR 92.10-45 - Weather deck communications.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Weather deck communications. 92.10-45...ARRANGEMENT Means of Escape § 92.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent inclined...

2010-10-01

238

46 CFR 174.215 - Drainage of weather deck.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Drainage of weather deck. 174.215 Section 174.215 Shipping...Offshore Supply Vessels § 174.215 Drainage of weather deck. The weather deck must have open rails to allow rapid clearing...

2010-10-01

239

46 CFR 174.215 - Drainage of weather deck.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Drainage of weather deck. 174.215 Section 174.215 Shipping...Offshore Supply Vessels § 174.215 Drainage of weather deck. The weather deck must have open rails to allow rapid clearing...

2013-10-01

240

46 CFR 92.10-45 - Weather deck communications.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Weather deck communications. 92.10-45...ARRANGEMENT Means of Escape § 92.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent inclined...

2011-10-01

241

46 CFR 72.10-45 - Weather deck communications.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Weather deck communications. 72.10-45...ARRANGEMENT Means of Escape § 72.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent...

2010-10-01

242

46 CFR 92.10-45 - Weather deck communications.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Weather deck communications. 92.10-45...ARRANGEMENT Means of Escape § 92.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent inclined...

2013-10-01

243

46 CFR 190.10-45 - Weather deck communications.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Weather deck communications. 190.10-45... Means of Escape § 190.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent inclined...

2012-10-01

244

46 CFR 190.10-45 - Weather deck communications.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Weather deck communications. 190.10-45... Means of Escape § 190.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent inclined...

2013-10-01

245

46 CFR 174.215 - Drainage of weather deck.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Drainage of weather deck. 174.215 Section 174.215 Shipping...Offshore Supply Vessels § 174.215 Drainage of weather deck. The weather deck must have open rails to allow rapid clearing...

2012-10-01

246

46 CFR 173.062 - Drainage of weather deck.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Drainage of weather deck. 173.062 Section 173.062 Shipping...VESSEL USE School Ships § 173.062 Drainage of weather deck. The weather deck of each sailing school vessel must be...

2012-10-01

247

46 CFR 173.062 - Drainage of weather deck.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Drainage of weather deck. 173.062 Section 173.062 Shipping...VESSEL USE School Ships § 173.062 Drainage of weather deck. The weather deck of each sailing school vessel must be...

2010-10-01

248

46 CFR 72.10-45 - Weather deck communications.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Weather deck communications. 72.10-45...ARRANGEMENT Means of Escape § 72.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent...

2011-10-01

249

46 CFR 174.215 - Drainage of weather deck.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Drainage of weather deck. 174.215 Section 174.215 Shipping...Offshore Supply Vessels § 174.215 Drainage of weather deck. The weather deck must have open rails to allow rapid clearing...

2011-10-01

250

46 CFR 190.10-45 - Weather deck communications.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Weather deck communications. 190.10-45... Means of Escape § 190.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent inclined...

2011-10-01

251

46 CFR 72.10-45 - Weather deck communications.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Weather deck communications. 72.10-45...ARRANGEMENT Means of Escape § 72.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent...

2012-10-01

252

46 CFR 173.062 - Drainage of weather deck.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Drainage of weather deck. 173.062 Section 173.062 Shipping...VESSEL USE School Ships § 173.062 Drainage of weather deck. The weather deck of each sailing school vessel must be...

2013-10-01

253

46 CFR 92.10-45 - Weather deck communications.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Weather deck communications. 92.10-45...ARRANGEMENT Means of Escape § 92.10-45 Weather deck communications. (a) Vertical...communication shall be provided between the various weather decks by means of permanent inclined...

2012-10-01

254

Demonstration of dual-band infrared thermal imaging for bridge inspection. Phase II, final report  

SciTech Connect

Developing and implementing methods of effective bridge rehabilitation is a major issue for the Federal Highway Administration (FHWA). The nation spends $5 billion annually to replace, rehabilitate or construct new bridges. According to the National Bridge Inventory, over 100,000 U.S. bridges are structurally deficient. About 40,000 of these bridges have advanced deck deterioration. The most common causes of serious deck deterioration is delamination. Delaminations result when steel reinforcements within the bridge deck corrode, creating gaps that separate the concrete into layers. A reliable inspection technology, capable of identifying delaminations, would represent a power new tool in bridge maintenance. To date, most bridge inspections rely on human interpretation of surface visual features of chain dragging. These methods are slow, disruptive, unreliable and raise serious safety concerns. Infrared thermal imaging detects subsurface delaminations and surface clutter, which is introduced by foreign material on the roadway. Typically, foreign material which is not always evident on a video tape image, produces a unique IR reflectance background unlike the thermal response of a subsurface delamination. Lawrence Livermore National Laboratory (LLNL) uses dual-band infrared (DBIR) thermal imaging to identify and remove nonthermal IR reflectance backgrounds from foreign material on the roadway. DBIR methods improve the performance of IR thermal imaging by a factor of ten, compared to single-band infrared (SBIR) methods. DBIR thermal imaging allows precise temperature measurement to reliably locate bridge deck delaminations and remove wavelength-dependent emissivity variations due to foreign material on the roadway.

Durbin, P.F.; Del Grande, N.K.; Schaich, P.C.

1996-03-01

255

Rapid-to-deploy wireless monitoring systems for static and dynamic load testing of bridges: validation on the Grove Street Bridge  

NASA Astrophysics Data System (ADS)

Bridge management officials have expressed a keen interest in the use of low-cost and easy-to-install wireless sensors to record bridge responses during short-term load testing. To illustrate the suitability of wireless sensors for short-term monitoring of highway bridges, a wireless monitoring system is installed upon the Grove Street Bridge to monitor structural responses during static and dynamic load testing. Specifically, load testing of the Grove Street Bridge is conducted after its construction to validate the behavior of a novel jointless bridge deck constructed from a high-performance fiber reinforced cementitious composite (HPFRCC) material. A heterogeneous array of sensing transducers are installed in the bridge including metal foil strain gages, accelerometers and linear variable differential transducers (LVDTs). First, the acceleration response of the bridge is monitored by the wireless system during routine traffic loading. Modal parameters (modal frequencies and mode shapes) are calculated by the wireless sensors so that an analytical model of the bridge constructed in a standard commercial finite element package can be updated off-line. Next, the bridge is closed to traffic and trucks of known weight are parked on the bridge to induce static deformations. The installation strategy of the wireless monitoring system during static load testing is optimized to monitor the strain and rotation response of the HPFRCC deck. The measured static response of the deck is compared to that predicted by the updated analytical model.

Hou, Tsung-Chin; Lynch, Jerome P.

2006-03-01

256

Myocardial Bridge  

MedlinePLUS

... surface of the heart. What is a myocardial bridge? A myocardial bridge is a band of heart muscle that lies ... artery, instead of underneath it. With a myocardial bridge, part of a coronary artery dips into and ...

257

Thermal Stability Analysis under Embankment with Asphalt Pavement and Cement Pavement in Permafrost Regions  

PubMed Central

The permafrost degradation is the fundamental cause generating embankment diseases and pavement diseases in permafrost region while the permafrost degradation is related with temperature. Based on the field monitoring results of ground temperature along G214 Highway in high temperature permafrost regions, both the ground temperatures in superficial layer and the annual average temperatures under the embankment were discussed, respectively, for concrete pavements and asphalt pavements. The maximum depth of temperature field under the embankment for concrete pavements and asphalt pavements was also studied by using the finite element method. The results of numerical analysis indicate that there were remarkable seasonal differences of the ground temperatures in superficial layer between asphalt pavement and concrete pavement. The maximum influencing depth of temperature field under the permafrost embankment for every pavement was under the depth of 8?m. The thawed cores under both embankments have close relation with the maximum thawed depth, the embankment height, and the service time. The effective measurements will be proposed to keep the thermal stabilities of highway embankment by the results. PMID:24027444

Jinping, Li; Xiaojuan, Quan

2013-01-01

258

75 FR 4584 - Wire Decking From China  

Federal Register 2010, 2011, 2012, 2013

...731-TA-1162 (Final)] Wire Decking From China...Scheduling of the final phase of countervailing duty...excluded from the scope is wire mesh shelving that...the conduct of this phase of the investigations...filed no later than three days before the...

2010-01-28

259

Flight deck automation: Promises and realities  

NASA Technical Reports Server (NTRS)

Issues of flight deck automation are multifaceted and complex. The rapid introduction of advanced computer-based technology onto the flight deck of transport category aircraft has had considerable impact both on aircraft operations and on the flight crew. As part of NASA's responsibility to facilitate an active exchange of ideas and information among members of the aviation community, a NASA/FAA/Industry workshop devoted to flight deck automation, organized by the Aerospace Human Factors Research Division of NASA Ames Research Center. Participants were invited from industry and from government organizations responsible for design, certification, operation, and accident investigation of transport category, automated aircraft. The goal of the workshop was to clarify the implications of automation, both positive and negative. Workshop panels and working groups identified issues regarding the design, training, and procedural aspects of flight deck automation, as well as the crew's ability to interact and perform effectively with the new technology. The proceedings include the invited papers and the panel and working group reports, as well as the summary and conclusions of the conference.

Norman, Susan D. (editor); Orlady, Harry W. (editor)

1989-01-01

260

33 CFR 155.790 - Deck lighting.  

Code of Federal Regulations, 2012 CFR

...plane 3 feet above the deck the illumination must measure at least: (1) 5.0 foot candles at transfer connection points; and (2) 1.0 foot candle in transfer operations work areas. (c) Lighting must be located or shielded so...

2012-07-01

261

33 CFR 155.790 - Deck lighting.  

Code of Federal Regulations, 2013 CFR

...plane 3 feet above the deck the illumination must measure at least: (1) 5.0 foot candles at transfer connection points; and (2) 1.0 foot candle in transfer operations work areas. (c) Lighting must be located or shielded so...

2013-07-01

262

33 CFR 155.790 - Deck lighting.  

...plane 3 feet above the deck the illumination must measure at least: (1) 5.0 foot candles at transfer connection points; and (2) 1.0 foot candle in transfer operations work areas. (c) Lighting must be located or shielded so...

2014-07-01

263

Flight-deck automation: Promises and problems  

NASA Technical Reports Server (NTRS)

The state of the art in human factors in flight-deck automation is presented. A number of critical problem areas are identified and broad design guidelines are offered. Automation-related aircraft accidents and incidents are discussed as examples of human factors problems in automated flight.

Wiener, E. L.; Curry, R. E.

1980-01-01

264

Human factors issues of flight deck automation  

Microsoft Academic Search

It is widely acknowledged that commercial transport aircraft automation has improved the economy of airliners, and that accident rates for advanced technology commercial aircraft are lower than those of comparable conventional technology aircraft. Nevertheless, criticism of the human factors of modern flight deck automation is common among pilots and other aviation professionals (e.g., Billings, 1997). Until recently, though, there was

Ken Funk; Beth Lyall

1998-01-01

265

Cognitive representations of flight-deck information attributes  

NASA Technical Reports Server (NTRS)

A large number of aviation issues are generically being called fligh-deck information management issues, underscoring the need for an organization or classification structure. One objective of this study was to empirically determine how pilots organize flight-deck information attributes and -- based upon that data -- develop a useful taxonomy (in terms of better understanding the problems and directing solutions) for classifying flight-deck information management issues. This study also empirically determined how pilots model the importance of flight-deck information attributes for managing information. The results of this analysis suggest areas in which flight-deck researchers and designers may wish to consider focusing their efforts.

Ricks, Wendell R.; Jonsson, Jon E.; Rogers, William H.

1994-01-01

266

POROUS PAVEMENT. PHASE I. DESIGN AND OPERATIONAL CRITERIA  

EPA Science Inventory

Design and operational criteria, utilization concepts, benefits and disadvantages, as well as other characteristics of porous pavements are presented in this report. Particular emphasis is placed on porous asphalt pavements, but the criteria and design approach are applicable to ...

267

An evaluation of the flexible pavement design system FPS19  

E-print Network

The flexible pavement design program used by the Texas Department of Transportation (TXDOT) for the past 20 years, FPS1 1 , uses the Stiffness Coefficient, based on Dynaflect deflections, to characterize pavement strength. The difficulty...

Carmona, Gerardo M

2012-06-07

268

Straw Bridges  

NSDL National Science Digital Library

Learners design, build and test a model bridge out of straws. The bridge must span 25 cm across a gap between two tables or two chairs. To measure the load, the bridge must securely hold a small cup. Learners test the load by placing as many pennies in the cup as possible and counting how many the bridge can hold.

Museum Of Science And Industry, Chicago

2012-01-01

269

Effects of overlay designs on reliability of flexible pavements  

Microsoft Academic Search

Management of flexible pavements requires timely application of preventive maintenance and rehabilitation actions such as overlays. These actions are an integral part of a design strategy that minimises the use of recourses over the pavement's life-cycle. The objective of this paper is to develop a reliability model for flexible pavements that accounts for the effects of overlay designs. In this

Vighnesh P. Deshpande; Ivan D. Damnjanovic; Paolo Gardoni

2010-01-01

270

Guide to Cement-Based Integrated Pavement Solutions  

E-print Network

Guide to Cement-Based Integrated Pavement Solutions August 2011 #12;Cement-Based Integrated Pavement Solutions Heavy Industrial Airports Highways Country Roads Arterials Commercial Commercial Residential Recreation LAND USE CEMENT-BASED INTEGRATED PAVEMENT SOLUTIONS 1 2 3 4 5 6 7 8

271

Fast Error Estimates For Indirect Measurements: Applications To Pavement Engineering  

E-print Network

Fast Error Estimates For Indirect Measurements: Applications To Pavement Engineering Carlos that is difficult to measure directly (e.g., lifetime of a pavement, efficiency of an engine, etc). To estimate y computation time. As an example of this methodology, we give pavement lifetime estimates. This work

Kreinovich, Vladik

272

Research Article Automatic Road Pavement Assessment with Image Processing: Review  

E-print Network

Research Article Automatic Road Pavement Assessment with Image Processing: Review and Comparison describe the proposed method to detect fine defects in pavement surface. This approach is based on a multi for evaluating this difficult task ­ the road pavement crack detection ­ is introduced. Finally, the proposed

Boyer, Edmond

273

Wisconsin DOT 1. Briefly summarize your current pavement smoothness requirements.  

E-print Network

Wisconsin DOT 1. Briefly summarize your current pavement smoothness requirements. We currently-contact profiling equipment. Most PCC pavements are profiled using lightweight profilers when the project is still closed to traffic. Most HMA pavements are profiled using high speed profilers (with the same measuring

274

Asphalt Pavement Aging and Temperature Dependent Properties through a Functionally  

E-print Network

Asphalt Pavement Aging and Temperature Dependent Properties through a Functionally Graded � Verification � Concluding Remarks Part � II (Companion presentation) � Asphalt Pavements � Effect of Aging: Asphalt concrete pavements (Part II) E1 E2 E3 Eh 1 2 3 h #12;Graded Finite Elements Graded Elements

Paulino, Glaucio H.

275

MANUAL FOR WEB-BASED TXDOT RIGID PAVEMENT Sureel Saraf  

E-print Network

0-5445-P2 MANUAL FOR WEB-BASED TXDOT RIGID PAVEMENT DATABASE Authors: Sureel Saraf Moon Won TxDOT Project 0-5445: Project Level Performance Database for Rigid Pavements in Texas SEPTEMBER 2007, REV. JULY-Based Information System for Rigid Pavements User's Manual Texas Department of Transportation July 9, 2009 #12

Texas at Austin, University of

276

Integrated Materials and Construction Practices (IMCP) for Concrete Pavement  

E-print Network

Integrated Materials and Construction Practices (IMCP) for Concrete Pavement Workshop Participant Handbook Prepared for Prepared by Federal Highway Administration National Concrete Pavement Technology Center Office of Pavement Technology at Iowa State University 400 7th Street AW 2711 South Loop Drive

277

Asphalt Pavement Aging and Temperature Dependent Properties through a Functionally  

E-print Network

Asphalt Pavement Aging and Temperature Dependent Properties through a Functionally Graded � II � Asphalt Pavements � Effect of Aging � Simulations � Concluding Remarks #12;3 Objectives Develop) Correspondence Principle based formulation Application: Asphalt concrete pavements (Part II) #12;4 Asphalt

Paulino, Glaucio H.

278

Porous Pavement in Cold Climates Part: Performance and Cost  

E-print Network

Porous Pavement in Cold Climates Part: Performance and Cost Onondaga Environmental Institute 17 #12;Overview 1. Hydrology of Permeable Pavements 2. Water Quality Performance 3. Hydraulic Performance However, a large number of installations STILL continue to be sub-standard 4 #12;Porous Pavement Design

279

TWO LIFT PCC PAVEMENTS TO MEET PUBLIC NEEDS  

E-print Network

TWO LIFT PCC PAVEMENTS TO MEET PUBLIC NEEDS TWO LIFT PCC PAVEMENTS TO MEETTWO LIFT PCC PAVEMENTS99PTEC99 EUROPEAN EXPERIENCEEUROPEAN EXPERIENCEEUROPEAN EXPERIENCE Countries employing two lift paving ­ France, Germany and Austria Lessons learned - 2-5.5 inch high quality surface courses - 8

280

PAVEMENT OVERLAY THICKNESS EVALUATION USING GROUND PENTRATING RADAR (GPR)  

E-print Network

deflectometer (FWD), and ground penetrating radar (GPR). Core drilling provides very accurate pin point pavementPAVEMENT OVERLAY THICKNESS EVALUATION USING GROUND PENTRATING RADAR (GPR) Dwayne Harris, M.Sc., PG for determining pavement thickness are core drilling, falling weight deflectometer (FWD), and ground penetrating

Shan, Jie

281

Truck fleet model for design and assessment of flexible pavements  

Microsoft Academic Search

The mechanistic empirical method of flexible pavement design\\/assessment uses a large number of numerical truck model runs to predict a history of dynamic load. The pattern of dynamic load distribution along the pavement is a key factor in the design\\/assessment of flexible pavement. While this can be measured in particular cases, there are no reliable methods of predicting the mean

Abraham Belay; Eugene Obrien; Dirk Kroese

2008-01-01

282

International Conference on Advanced Composite Materials in Bridges and Structures Confrence Internationale sur les matriaux composites d'avant-garde pour ponts et charpentes  

E-print Network

the structural performance of innovative 3-D FRP sandwich panels. The panels consist of GFRP laminates and foam. Conventional steel reinforced concrete and steel decks are prone to corrosion, which drastically reduces their service life. Replacement or repair of concrete bridges and parking decks has also proven to be very

283

The Collapse of the I-35W Bridge in Minneapolis  

ERIC Educational Resources Information Center

On Wednesday, Aug. 1, 2007, at 6:05 p.m. (during evening rush hour), the I-35W bridge across the Mississippi River in Minneapolis collapsed, killing 13 people and injuring 145. At the time of the collapse, repair work was in progress on the deck of the bridge, resulting in an additional 287 tons of construction material and equipment being on the…

Feldman, Bernard J.

2010-01-01

284

Prediction of aeroelastic stability of suspension bridges during erection  

Microsoft Academic Search

During erection of long-span suspension bridges the stiffening girder lacks torsional continuity. Thus, it becomes important to consider flutter-type aeroelastic instabilities. During the early stages of deck erection, the critical wind speed for onset of flutter becomes particularly low and in this case it may prove interesting to consider flutter control by provision of eccentric ballast. The present paper extends

Allan Larsen

1997-01-01

285

A new steel structural system of a suspension pedestrian bridge  

Microsoft Academic Search

The paper deals with a new structural system of pedestrian steel bridge consisting of carrying suspension members made of stiff (in bending) rolled or welded sections and a flexible cylindrical deck. Structural behaviour of such a suspension member subjected to unsymmetrical live loading has been discussed on a basis of kinematic conditions. Ways of stabilization of kinematic displacements have been

A. Juozapaitis; P. Vainiunas; G. Kaklauskas

2006-01-01

286

Spills on Flat Inclined Pavements  

SciTech Connect

This report describes the general spill phenomenology for liquid spills occurring on relatively impermeable surfaces such as concrete or asphalt pavement and the development and application of a model to describe the time evolution of such spills. The discussion assumes evaporation and degradation are negligible and a homogeneous surface. In such an instance, the inherent interfacial properties determine the spatial extent of liquid spreading with the initial flow being controlled by the release rate of the spill and by the liquids resistance to flow as characterized by its viscosity. A variety of spill scenarios were simulated and successful implementation of the model was achieved. A linear relationship between spill area and spill volume was confirmed. The simulations showed spill rate had little effect on the final spill area. Slope had an insignificant effect on the final spill area, but did modify spill shape considerably. However, a fluid sink on the edge of the simulation domain, representing a storm drain, resulted in a substantial decrease in spill area. A bona fide effort to determine the accuracy of the model and its calculations remain, but comparison against observations from a simple experiment showed the model to correctly determine the spill area and general shape under the conditions considered. Further model verification in the form of comparison against small scale spill experiments are needed to confirm the models validity.

Simmons, Carver S.; Keller, Jason M.; Hylden, Jeff L.

2004-03-01

287

Performance of continuously reinforced concrete pavements: Volume 6 -- CRC pavement design, construction, and performance. Final report, August 1990--December 1994  

SciTech Connect

This report is one of a series of reports prepared as part of a recent study sponsored by the Federal Highway Administration (FHWA) aimed at updating the state-of-the-art of the design, construction, maintenance, and rehabilitation of continuous reinforced concrete (CRC) pavements. The scope of work of the FHWA study included the following: (1) Conduct of a literature review and preparation of an annotated bibliography on CRC pavements and CRC overlays. (2) Conduct of a field investigation and laboratory testing related to 23 existing in-service pavement sections. This was done to evaluate the effect of various design features on CRC pavement performance, to identify any design or construction related problems, and to recommend procedures to improve CRC pavement technology. (3) Evaluation of the effectiveness of various maintenance and rehabilitation strategies for CRC pavements. (4) Preparation of a Summary Report on the current state of the practice for CRC pavements. Each of the above four items is addressed in a separate report. The following reports have been prepared under this study: Performance of CRC Pavements. Volume 1: Summary of Practice and Annotated Bibliography. Volume 2: Field Investigation of CRC Pavements. Volume 3: Analysis and Evaluation of Field Test Data. Volume 4: Resurfacing for CRC Pavements. Volume 5: Maintenance and Repair of CRC Pavements. Volume 6: CRC Pavement Design, Construction, and Performance. Volume 7: Summary. This report is Volume 6 in the series.

Zollinger, D.G.; Buch, N.; Xin, D.; Soares, J.

1999-02-01

288

Flight-deck automation - Promises and problems  

NASA Technical Reports Server (NTRS)

The paper analyzes the role of human factors in flight-deck automation, identifies problem areas, and suggests design guidelines. Flight-deck automation using microprocessor technology and display systems improves performance and safety while leading to a decrease in size, cost, and power consumption. On the other hand negative factors such as failure of automatic equipment, automation-induced error compounded by crew error, crew error in equipment set-up, failure to heed automatic alarms, and loss of proficiency must also be taken into account. Among the problem areas discussed are automation of control tasks, monitoring of complex systems, psychosocial aspects of automation, and alerting and warning systems. Guidelines are suggested for designing, utilising, and improving control and monitoring systems. Investigation into flight-deck automation systems is important as the knowledge gained can be applied to other systems such as air traffic control and nuclear power generation, but the many problems encountered with automated systems need to be analyzed and overcome in future research.

Wiener, E. L.; Curry, R. E.

1980-01-01

289

Breaking/cracking and seating concrete pavements. Final report  

SciTech Connect

This synthesis will be of interest to pavement designers, maintenance engineers, and others interested in reducing reflection cracking of asphalt overlays on portland cement concrete (PCC) pavement. Information is presented on the technique of breaking or cracking of the concrete pavement into small segments before overlaying with asphalt concrete. Asphalt concrete overlays on existing PCC pavements are subject to reflection cracking induced by thermal movements of PCC pavement. The report of the Transportation Research Board discusses the technique of breaking/cracking and seating of the existing PCC before an overlay as a means to reduce or eliminate reflection cracking.

Thompson, M.R.

1989-03-01

290

Micro-thermal stress analysis of cement based pavement composite  

SciTech Connect

A four-layer sphere model for microscopic thermal analysis was proposed based upon the structural form of cement based pavement composites. Using temperature induced stresses of pavement structure as the external field, the micro-thermal stresses of two types of cement based pavement composite were calculated. The results showed that, by introducing the low stiffness rubberized asphalt in the interphase of coarse aggregate phase and cement mortar phase of Portland cement concrete, the interfacial thermal stresses could be reduced significantly, thus improving crack resistance of the pavement material under low temperature environment. Factors affecting micro-thermal stress of cement based pavement composite were discussed.

Li, G.; Zhao, Y.; Pang, S.S. [Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Mechanical Engineering; Huang, W. [Southeast Univ., Nanjing (China). Coll. of Transportation

1998-12-31

291

Speckle techniques for pavement surface analysis  

NASA Astrophysics Data System (ADS)

Speckle techniques are investigated for the characterization of pavement surface microtexture, particularly, height variations from one up to about ten micrometers in amplitude. Using the scalar diffraction theory of Kirchhoff, some simulations of the speckle contrast were carried out to bring out some patterns in case of a subjective speckle whose grains are not resolved by CCD photodetectors and in the case of a two-scale surface texture. We deduce the possibility of characterizing the fineness of the microtexture or its evolution versus wear modifying. The method is also experimentally applied to some reference surfaces (abrasive papers with various finenesses) and some models of pavement surfaces at various steps of wear.

Hun, Catherine; Caussignac, Jean-Marie; Bruynooghe, Michel M.

2003-05-01

292

An evaluation of pavement markings and raised pavement markers at left exit lane drops  

E-print Network

components; more drivers are affected, interactions in the traffic stream are more turbulent, and the potential for confusion and accidents is substantially greater. Exit-only signs and pavement markings are two methods used to communicate an exit lane drop...

Lance, Marty Tina

2012-06-07

293

Removable Urban Pavements: An innovative, sustainable technology Journal: International Journal of Pavement Engineering  

E-print Network

to the human environment, causing noise, air pollution and traffic congestion; moreover, they exert of the RUP concept in decreasing the public nuisance caused by pavement and road network maintenance work

Paris-Sud XI, Université de

294

Chip Seals for Asphalt Concrete Pavements: A Proposed Emulsion Residue Specification and Existing Pavement Texture Evaluation  

E-print Network

Analysis and Wavelet Transforms........................................................................... 42 AIMS Texture Analysis Using Height Measurements and Profiling ... 44 Ames Laser Texture Scanner... scanner to measure pavement macrotexture. ...................................................................................... 46 Figure 11 Texture measurement results from NCHRP Project 14-17 chip seal xiii...

Hoyt, Denise

2012-07-16

295

Unintended Impacts of Increased Truck Loads on Pavement Supply-Chain Emissions  

E-print Network

Unintended Impacts of Increased Truck Loads on Pavement Supply-Chain Emissions Nakul Sathaye, Arpad by pavements. The supply chain associated with pavement maintenance and construction releases significant air tailpipe versus pavement supplychain emissions. In some cases, unintended emissions from the pavement

California at Berkeley, University of

296

Popsicle Bridge  

NSDL National Science Digital Library

In this activity, learners explore how engineering has impacted the development of bridges over time, including innovative designs and the challenge of creating bridges that become landmarks for a city. Learners work in teams of "engineers" to design and build their own bridge out of glue and popsicle sticks. Learners test their bridges using weights, evaluate their results, and present their findings to the group.

Ieee

2013-08-30

297

Computer simulation of buffeting actions of suspension bridges under turbulent wind  

Microsoft Academic Search

Suspension bridges are long-span flexible structures susceptible to various types of wind induced vibrations such as buffeting actions. In this paper, a three dimensional finite-element model formulated to deal with suspension bridges under turbulent wind is presented. In this model, all sources of geometric nonlinearity such as cable sag, force-bending moment interaction in the bridge deck and towers, and changes

Q. Ding; P. K. K. Lee

2000-01-01

298

Spaghetti Bridge  

NSDL National Science Digital Library

Civil engineers design structures such as buildings, dams, highways and bridges. Student teams explore the field of engineering by making bridges using spaghetti as their primary building material. Then they test their bridges to see how much weight they can carry before breaking.

K-12 Outreach Office,

299

Performance of segregated hot mix asphalt pavements  

Microsoft Academic Search

A laboratory study was conducted to evaluate the performance of segregated hot mix asphalt (HMA) pavements. The study involved simulating in-situ segregation of two current projects. Tests in the study were a laboratory wheel track test (PURWheel) and triaxial tests (including resilient modulus). For each project four segregation levels were determined based on field observation and subsequent analysis of gradation,

Zhenghao Wang

2000-01-01

300

Permeable pavement research ? Edison, New Jersey  

EPA Science Inventory

These are the slides for the New York City Concrete Promotional Council Pervious Concrete Seminar presentation. The basis for the project, the monitoring design and some preliminary monitoring data from the permeable pavement parking lot at the Edison Environmental Center are pre...

301

Desert pavement study at Amboy, California  

NASA Technical Reports Server (NTRS)

Desert pavement is a general term describing a surface that typically consists of a thin layer of cm-sized rock fragments set on top of a layer of finer material in which no fragments are found. An understanding of desert pavement is important to planetary geology because they may play a major role in the formation and visibility of various aeolian features such as wind streaks, which are important on Mars and may be important on Venus. A field study was conducted in Amboy, California to determine the formation mechanism of desert pavements. The probable sequence of events for the formation and evolution of a typical desert pavement surface, based on this experiment and the work of others, is as follows. Starting with a layer of surface material consisting of both fine particles and rock fragments, aeolian deflation will rapidly erode the surface until an armored lag is developed, after which aeolian processes become less important. The concentration of fragments then slowly increases as new fragments are brought to the surface from the subsurface and as fragments move downslope by sheet wash. Sheet wash would be responsible for removing very fine particles from the surface and for moving the fragments relative to one another, forming interlocks.

Williams, S.; Greeley, R.

1984-01-01

302

77 FR 25189 - Extension of Agency Information Collection Activity Under OMB Review: Federal Flight Deck Officer...  

Federal Register 2010, 2011, 2012, 2013

...Collection Activity Under OMB Review: Federal Flight Deck Officer Program AGENCY: Transportation...suitability for participating in the Federal Flight Deck Officer (FFDO) Program, and deputized...Collection Requirement Title: Federal Flight Deck Officer Program. Type of...

2012-04-27

303

46 CFR 28.810 - Deck rails, lifelines, storm rails and hand grabs.  

Code of Federal Regulations, 2011 CFR

...Deck rails, lifelines, storm rails and hand grabs. 28.810 Section 28.810...Deck rails, lifelines, storm rails and hand grabs. (a) Except as otherwise...limitations make deck rails impractical, hand grabs may be substituted. (b)...

2011-10-01

304

46 CFR 28.810 - Deck rails, lifelines, storm rails and hand grabs.  

Code of Federal Regulations, 2012 CFR

...Deck rails, lifelines, storm rails and hand grabs. 28.810 Section 28.810...Deck rails, lifelines, storm rails and hand grabs. (a) Except as otherwise...limitations make deck rails impractical, hand grabs may be substituted. (b)...

2012-10-01

305

46 CFR 28.810 - Deck rails, lifelines, storm rails and hand grabs.  

Code of Federal Regulations, 2010 CFR

...Deck rails, lifelines, storm rails and hand grabs. 28.810 Section 28.810...Deck rails, lifelines, storm rails and hand grabs. (a) Except as otherwise...limitations make deck rails impractical, hand grabs may be substituted. (b)...

2010-10-01

306

46 CFR 28.810 - Deck rails, lifelines, storm rails and hand grabs.  

Code of Federal Regulations, 2013 CFR

...Deck rails, lifelines, storm rails and hand grabs. 28.810 Section 28.810...Deck rails, lifelines, storm rails and hand grabs. (a) Except as otherwise...limitations make deck rails impractical, hand grabs may be substituted. (b)...

2013-10-01

307

46 CFR 116.1120 - Drainage of cockpit vessels, well deck vessels, and open boats.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Drainage of cockpit vessels, well deck vessels...PASSENGERS CONSTRUCTION AND ARRANGEMENT Drainage and Watertight Integrity of Weather Decks § 116.1120 Drainage of cockpit vessels, well deck...

2012-10-01

308

46 CFR 116.1120 - Drainage of cockpit vessels, well deck vessels, and open boats.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Drainage of cockpit vessels, well deck vessels...PASSENGERS CONSTRUCTION AND ARRANGEMENT Drainage and Watertight Integrity of Weather Decks § 116.1120 Drainage of cockpit vessels, well deck...

2013-10-01

309

46 CFR 171.140 - Drainage of a flush deck vessel.  

Code of Federal Regulations, 2012 CFR

... 2012-10-01 2012-10-01 false Drainage of a flush deck vessel. 171.140 Section...PERTAINING TO VESSELS CARRYING PASSENGERS Drainage of Weather Decks § 171.140 Drainage of a flush deck vessel. (a)...

2012-10-01

310

46 CFR 116.1120 - Drainage of cockpit vessels, well deck vessels, and open boats.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Drainage of cockpit vessels, well deck vessels...PASSENGERS CONSTRUCTION AND ARRANGEMENT Drainage and Watertight Integrity of Weather Decks § 116.1120 Drainage of cockpit vessels, well deck...

2010-10-01

311

46 CFR 116.1120 - Drainage of cockpit vessels, well deck vessels, and open boats.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Drainage of cockpit vessels, well deck vessels...PASSENGERS CONSTRUCTION AND ARRANGEMENT Drainage and Watertight Integrity of Weather Decks § 116.1120 Drainage of cockpit vessels, well deck...

2011-10-01

312

46 CFR 178.450 - Calculation of drainage area for cockpit and well deck vessels.  

Code of Federal Regulations, 2013 CFR

...INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.450 Calculation of drainage area...4389.12 × [(Recess Volume × Recess Ratio) + (Weather Deck Volume × Weather Deck Ratio)]; or Basic Drainage area in...

2013-10-01

313

46 CFR 178.450 - Calculation of drainage area for cockpit and well deck vessels.  

Code of Federal Regulations, 2011 CFR

...INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.450 Calculation of drainage area...4389.12 × [(Recess Volume × Recess Ratio) + (Weather Deck Volume × Weather Deck Ratio)]; or Basic Drainage area in...

2011-10-01

314

46 CFR 178.450 - Calculation of drainage area for cockpit and well deck vessels.  

Code of Federal Regulations, 2012 CFR

...INTACT STABILITY AND SEAWORTHINESS Drainage of Weather Decks § 178.450 Calculation of drainage area...4389.12 × [(Recess Volume × Recess Ratio) + (Weather Deck Volume × Weather Deck Ratio)]; or Basic Drainage area in...

2012-10-01

315

Pavement management and weigh-in-motion. Transportation research record  

SciTech Connect

The 15 papers in the report deal with the following areas: development of a preventive maintenance algorithm for use in pavement-management systems; pavement-performance prediction model using the Markov Process; roadway modeling and data conversion for a transportation-facilities information system; development of a methodology to estimate pavement maintenance and repair costs for different ranges of pavement-condition index; new techniques for modeling pavement deterioration; pavement management at the local government level; a comprehensive ranking system for local-agency pavement management; expert system as a part of pavement management; MAPCON: a pavement-evaluation data-analysis computer system; a microcomputer procedure to analyze axle load limits and pavement damage responsibility; selected results from the first three years of the Oregon automatic monitoring demonstration project; automated acquisition of truck-tire pressure data; calibration and accuracy testing of weigh-in-motion systems; accuracy and tolerances of weigh-in-motion systems; on-site calibration of weigh-in-motion systems.

Cation, K.A.; Shahin, M.Y.; Scullion, T.; Lytton, R.L.; Butt, A.A.

1987-01-01

316

Advanced ground-penetrating, imaging radar for bridge inspection  

SciTech Connect

Inspecting high-value structures, like bridges and buildings using Ground Penetrating Radar (GPR) is an application of the technology that is growing in importance. In a typical inspection application, inspectors use GPR to locate structural components, like reinforcing bars embedded in concrete, to avoid weakening the structure while collecting core samples for detailed inspection. Advanced GPR, integrated with imaging technologies for use as an NDE tool, can provide the capability to locate and characterize construction flaws and wear- or age-induced damage in these structures without the need for destructive techniques like coring. In the following sections, we discuss an important inspection application, namely, concrete bridge deck inspection. We describe an advanced bridge deck inspection system concept and provide an overview of a program aimed at developing such a system. Examples of modeling, image reconstruction, and experimental results are presented.

Warhus, J.P.; Mast, J.E.; Johansson, E.M.; Nelson, S.E. [Lawrence Livermore National Lab., CA (United States); Lee, Hua [California Univ., Santa Barbara, CA (United States). Dept. of Electrical and Computer Engineering

1993-08-01

317

Golden Gate Bridge response: a study with low-amplitude data from three earthquakes  

USGS Publications Warehouse

The dynamic response of the Golden Gate Bridge, located north of San Francisco, CA, has been studied previously using ambient vibration data and finite element models. Since permanent seismic instrumentation was installed in 1993, only small earthquakes that originated at distances varying between ~11 to 122 km have been recorded. Nonetheless, these records prompted this study of the response of the bridge to low amplitude shaking caused by three earthquakes. Compared to previous ambient vibration studies, the earthquake response data reveal a slightly higher fundamental frequency (shorter-period) for vertical vibration of the bridge deck center span (~7.7–8.3 s versus 8.2–10.6 s), and a much higher fundamental frequency (shorter period) for the transverse direction of the deck (~11.24–16.3 s versus ~18.2 s). In this study, it is also shown that these two periods are dominant apparent periods representing interaction between tower, cable, and deck.

Celebi, Mehmet

2012-01-01

318

Experimental Study on Geocell-Reinforced Recycled Asphalt Pavement (RAP) Bases under Static and Cyclic Loading  

E-print Network

Recycled Asphalt Pavement (RAP) is a removed and reprocessed pavement material containing asphalt and aggregates which can be used as a base course material for pavement applications. Geocells are a three-dimensional interconnected honeycomb type...

Thakur, Jitendra Kumar

2011-01-13

319

23 CFR 973.208 - Indian lands pavement management system (PMS).  

Code of Federal Regulations, 2012 CFR

...2012-04-01 false Indian lands pavement management system (PMS). 973.208...Systems § 973.208 Indian lands pavement management system (PMS). In addition...concepts described in the AASHTO's “Pavement Management Guide.” 1 1...

2012-04-01

320

23 CFR 970.208 - Federal lands pavement management system (PMS).  

Code of Federal Regulations, 2012 CFR

...2012-04-01 false Federal lands pavement management system (PMS). 970.208...Systems § 970.208 Federal lands pavement management system (PMS). In addition... (i) An inventory of the physical pavement features including the number of...

2012-04-01

321

23 CFR 971.208 - Federal lands pavement management system (PMS).  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Federal lands pavement management system (PMS). 971.208...Systems § 971.208 Federal lands pavement management system (PMS). In addition...concepts described in the AASHTO's “Pavement Management Guide.” 1 1...

2013-04-01

322

23 CFR 970.208 - Federal lands pavement management system (PMS).  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Federal lands pavement management system (PMS). 970.208...Systems § 970.208 Federal lands pavement management system (PMS). In addition... (i) An inventory of the physical pavement features including the number of...

2013-04-01

323

23 CFR 971.208 - Federal lands pavement management system (PMS).  

...2014-04-01 false Federal lands pavement management system (PMS). 971.208...Systems § 971.208 Federal lands pavement management system (PMS). In addition...concepts described in the AASHTO's “Pavement Management Guide.” 1 1...

2014-04-01

324

23 CFR 970.208 - Federal lands pavement management system (PMS).  

...2014-04-01 false Federal lands pavement management system (PMS). 970.208...Systems § 970.208 Federal lands pavement management system (PMS). In addition... (i) An inventory of the physical pavement features including the number of...

2014-04-01

325

23 CFR 972.208 - Federal lands pavement management system (PMS).  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Federal lands pavement management system (PMS). 972.208...Systems § 972.208 Federal lands pavement management system (PMS). In addition...concepts described in the AASHTO's “Pavement Management Guide.”2 2...

2013-04-01

326

23 CFR 973.208 - Indian lands pavement management system (PMS).  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Indian lands pavement management system (PMS). 973.208...Systems § 973.208 Indian lands pavement management system (PMS). In addition...concepts described in the AASHTO's “Pavement Management Guide.” 1 1...

2013-04-01

327

23 CFR 972.208 - Federal lands pavement management system (PMS).  

Code of Federal Regulations, 2012 CFR

...2012-04-01 false Federal lands pavement management system (PMS). 972.208...Systems § 972.208 Federal lands pavement management system (PMS). In addition...concepts described in the AASHTO's “Pavement Management Guide.”2 2...

2012-04-01

328

23 CFR 972.208 - Federal lands pavement management system (PMS).  

Code of Federal Regulations, 2011 CFR

...2011-04-01 false Federal lands pavement management system (PMS). 972.208...Systems § 972.208 Federal lands pavement management system (PMS). In addition...concepts described in the AASHTO's “Pavement Management Guide.”2 2...

2011-04-01

329

23 CFR 973.208 - Indian lands pavement management system (PMS).  

...2014-04-01 false Indian lands pavement management system (PMS). 973.208...Systems § 973.208 Indian lands pavement management system (PMS). In addition...concepts described in the AASHTO's “Pavement Management Guide.” 1 1...

2014-04-01

330

23 CFR 970.208 - Federal lands pavement management system (PMS).  

Code of Federal Regulations, 2011 CFR

...2011-04-01 false Federal lands pavement management system (PMS). 970.208...Systems § 970.208 Federal lands pavement management system (PMS). In addition... (i) An inventory of the physical pavement features including the number of...

2011-04-01

331

76 FR 67018 - Notice to Manufacturers of Airport In-Pavement Stationary Runway Weather Information Systems  

Federal Register 2010, 2011, 2012, 2013

...Airport In-Pavement Stationary Runway Weather Information Systems AGENCY: Federal Aviation...Manufacturers of In-Pavement Stationary Runway Weather Information Systems...Passive In- Pavement Stationary Runway Weather Information Systems that meet the...

2011-10-28

332

Instrumentation of bridges for long-term performance monitoring  

NASA Astrophysics Data System (ADS)

As the state of the art in bridge design is advancing toward the performance-based design, it becomes increasingly important to monitor and evaluate the long-term structural performance of bridges, including strains in critical structural members, soil pressures on the abutment back walls and footings, accelerations on the decks and bents, etc. Such information is essential in developing new performance criteria for design. In this research, sensor systems for long-term structural performance monitoring have been installed on two new highway bridges on Orange County, California: the Jamboree Road Overcrossing and the West Street On-Ramp.

Feng, Maria Q.; Kim, Doo-Kie; Sheng, Li-Hong; Fiji, Leonard M.; Kim, Yoo J.

2001-08-01

333

Asphalt Pavement Aging and TemperatureAsphalt Pavement Aging and Temperature Dependent Properties using a FunctionallyDependent Properties using a Functionally  

E-print Network

Asphalt Pavement Aging and TemperatureAsphalt Pavement Aging and Temperature Dependent Properties Analysis Time Integration Analysis Application Examples: Asphalt Pavement Summary and Conclusions #12) � Large fraction produced as hot-mix asphalt (HMA) � Most common form of pavement surfacing material (96

Paulino, Glaucio H.

334

46 CFR 28.565 - Water on deck.  

Code of Federal Regulations, 2011 CFR

(b) Except for a vessel that operates on protected waters, the residual righting energy, “b” in Figure 28.565, must not be less than the water on deck heeling energy, “a” in Figure 28.565. (c) The water on deck heeling energy must be determined assuming the...

2011-10-01

335

14 CFR 121.547 - Admission to flight deck.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Admission to flight deck. 121.547 Section 121.547 Aeronautics...DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Flight Operations § 121.547 Admission to flight deck. (a) No person may admit any...

2010-01-01

336

14 CFR 121.547 - Admission to flight deck.  

...2014-01-01 2014-01-01 false Admission to flight deck. 121.547 Section 121.547 Aeronautics...DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Flight Operations § 121.547 Admission to flight deck. (a) No person may admit any...

2014-01-01

337

14 CFR 121.547 - Admission to flight deck.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 2013-01-01 false Admission to flight deck. 121.547 Section 121.547 Aeronautics...DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Flight Operations § 121.547 Admission to flight deck. (a) No person may admit any...

2013-01-01

338

14 CFR 121.547 - Admission to flight deck.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 2012-01-01 false Admission to flight deck. 121.547 Section 121.547 Aeronautics...DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Flight Operations § 121.547 Admission to flight deck. (a) No person may admit any...

2012-01-01

339

27. VIEW LOOKING AFT ON STARBOARD SIDE OF MAIN DECK ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

27. VIEW LOOKING AFT ON STARBOARD SIDE OF MAIN DECK WITH TENDER ANNIE RUTH ALONGSIDE. COVER OF FORWARD COMPANIONWAY HAS BEEN PLACED ON MAIN DECK; SUN AWNING A TYPICAL FEATURE IN TROPICAL CLIMATES. CREW MEMBERS UNKNOWN Original 4-3/4'x6-3/4' photograph taken c. 1930? - Pilot Schooner "Alabama", Moored in harbor at Vineyard Haven, Vineyard Haven, Dukes County, MA

340

33 CFR 401.32 - Cargo booms-deck cargo.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Cargo booms-deck cargo. 401.32 Section 401... Seaway Navigation § 401.32 Cargo booms—deck cargo. (a) Every vessel shall have cargo booms secured in a manner that affords...

2010-07-01

341

Crewmember working on the mid deck Zeolite Crystal Growth experiment.  

NASA Technical Reports Server (NTRS)

View showing Payload Specialist Bonnie Dunbar, in the mid deck, conducting the Zeolite Crystal Growth (ZCG) Experiment in the mid deck stowage locker work area. View shows assembly of zeolite sample in the metal autoclave cylinders prior to insertion into the furnace.

1992-01-01

342

30. View of main deck at bow (looking aft from ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

30. View of main deck at bow (looking aft from samson post, upper deck removed), showing anchor windlass (left foreground), head (right foregound), and forward deckhouse; weather canopy overhead not an original or permanent feature - Schooner WAWONA, 1018 Valley Street, Seattle, King County, WA

343

MODELING PAVEMENT DETERIORATION PROCESSES BY POISSON HIDDEN MARKOV MODELS  

NASA Astrophysics Data System (ADS)

In pavement management, it is important to estimate lifecycle cost, which is composed of the expenses for repairing local damages, including potholes, and repairing and rehabilitating the surface and base layers of pavements, including overlays. In this study, a model is produced under the assumption that the deterioration process of pavement is a complex one that includes local damages, which occur frequently, and the deterioration of the surface and base layers of pavement, which progresses slowly. The variation in pavement soundness is expressed by the Markov deterioration model and the Poisson hidden Markov deterioration model, in which the frequency of local damage depends on the distribution of pavement soundness, is formulated. In addition, the authors suggest a model estimation method using the Markov Chain Monte Carlo (MCMC) method, and attempt to demonstrate the applicability of the proposed Poisson hidden Markov deterioration model by studying concrete application cases.

Nam, Le Thanh; Kaito, Kiyoyuki; Kobayashi, Kiyoshi; Okizuka, Ryosuke

344

Thermal cracking of rubber modified pavements, May 1995. Final report  

SciTech Connect

In accordance with the original ISTEA mandate (1991) to use crumb tire rubber in pavements, Alaska would be required to use about 250 tons of used tire rubber starting in 1994 and increasing to about 1,000 tons of rubber in 1997 and each year thereafter. A number of pavements using crumb rubber modifiers have been built in the state and have been in service for periods of 8 to 15 years. Knowledge of the behavior of these rubber-modified pavements under extreme climate conditions, particularly in relation to their low temperature cracking resistance, is necessary for future design and construction of rubberized pavements in Alaska. This report presents results of a study to determine the low temperature cracking resistance of rubber modified pavements in Alaska in comparison with conventional asphalt concrete pavements.

Raad, L.; Yuan, X.; Saboundjian, S.

1995-05-01

345

Zachar and Naik Principles of Infrared Thermography and  

E-print Network

that are not detectable by visual surface inspection. A pre-spalling condition occurs when the salt used to deice the road Information Pavement and bridge deck deterioration is a significant problem, especially in climates where salt

Wisconsin-Milwaukee, University of

346

6. DETAIL VIEW AT ROAD LEVEL, SHOWING STEELDECK GRATING AND ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

6. DETAIL VIEW AT ROAD LEVEL, SHOWING STEEL-DECK GRATING AND JUNCTURE OF ARCH AND PAVEMENT - Benson Street Concrete Bowstring Bridge, Spanning Mill Creek at Benson Street, Lockland, Hamilton County, OH

347

The impact of material characteristics on tire pavement interaction noise for flexible pavements  

NASA Astrophysics Data System (ADS)

Noise pollution has recently been one of the growing problems all over the world. While there are many sources of the noise, traffic noise is the main contributor to the total environmental noise. Although there are different sources for traffic noise, the tire pavement interaction noise is the most dominant component within most city and highway limits. One of the ways to reduce the tire pavement noise is to improve the material characteristics of the pavements such that they produce less noise. In this study, the relationship between basic material characteristics (e.g., Hot Mix Asphalt (HMA) volumetrics) and sound generation and absorption characteristics of flexible pavements was investigated. In addition, the effect of linear visco-elastic properties (e.g., dynamic modulus (|E*|) and phase angle (delta)) on sound absorption was studied. In order to focus only on impact of material characteristics and overshadow the effect of surface texture, a novel laboratory tire pavement noise measurement simulator (TIPANOS) was developed. The statistical analysis results showed that although the individual material characteristics do not have appreciable influence on sound absorption, there is a significant correlation between sound pressure levels (SPL) and combination of several material and linear visco-elastic parameters.

Kocak, Salih

348

Roswell International Air Center Airport (ROW) Pavement Condition and Analysis  

E-print Network

....................................................................................................................Runway 3-21 14 ..............................................................Figure 6. Base and Subgrade Analysis for Runway 3-21 14 Aircraft Used for Runway Pavement Design 25 ...................................................Table 7. FAA

Cal, Mark P.

349

Multimodal approach to seismic pavement testing  

USGS Publications Warehouse

A multimodal approach to nondestructive seismic pavement testing is described. The presented approach is based on multichannel analysis of all types of seismic waves propagating along the surface of the pavement. The multichannel data acquisition method is replaced by multichannel simulation with one receiver. This method uses only one accelerometer-receiver and a light hammer-source, to generate a synthetic receiver array. This data acquisition technique is made possible through careful triggering of the source and results in such simplification of the technique that it is made generally available. Multiple dispersion curves are automatically and objectively extracted using the multichannel analysis of surface waves processing scheme, which is described. Resulting dispersion curves in the high frequency range match with theoretical Lamb waves in a free plate. At lower frequencies there are several branches of dispersion curves corresponding to the lower layers of different stiffness in the pavement system. The observed behavior of multimodal dispersion curves is in agreement with theory, which has been validated through both numerical modeling and the transfer matrix method, by solving for complex wave numbers. ?? ASCE / JUNE 2004.

Ryden, N.; Park, C.B.; Ulriksen, P.; Miller, R.D.

2004-01-01

350

Small-scale accelerated pavement testing  

SciTech Connect

This paper presents the results of a study conducted to explore the use of small-scale models of accelerated pavement testing (APT) devices to evaluate the performance of pavements in conjunction with full-scale tests. The motivation for the study was the availability of a model mobile load simulator (MMLS), which had been built originally to illustrate the operation of the full-scale mobile load simulator (MLS) under design at the time. The scaling requirements will be different depending on whether dynamic (inertia), viscous, or gravity effects are important. One must thus decide which one of these effects controls the behavior to try to reproduce it exactly. In the preliminary tests conducted with the MMLS, emphasis had been placed in reproducing accurately the viscoelastic behavior of the asphalt layer. The possibility of obtaining valid results, even if similitude is not maintained in relation to inertia forces, is explored in this paper. The effects of load frequency or velocity and the effects of layer thicknesses are studied. The total thickness of the model pavement, which must be finite, and its effects on displacements and strains are also considered. It is concluded that even when full similitude is not satisfied it is possible to obtain valid results that can be extrapolated to predict prototype performance if one were interested primarily in the behavior of the asphalt layer. Preliminary analyses should be conducted, however, to guide on the selection of the model dimensions.

Kim, S.M. [Korea Highway Corp., Kyunggi (Korea, Republic of). Highway Research Inst.; Hugo, F. [Univ. of Stellenbosch (South Africa). Inst. for Transport Technology; Roesset, J.M. [Univ. of Texas, Austin, TX (United States). Dept. of Civil Engineering

1998-03-01

351

Failure of concrete T-beam and box-girder highway bridges subjected to cyclic loading from traffic  

Microsoft Academic Search

Concrete cast-in-place T-beam highway bridges are often constructed by casting the girders and the deck separately, creating a cold joint between the girders and the deck. Under certain circumstances, cracking and visible slippage can occur in this joint, resulting in fracture of the reinforcing steel crossing the joint, greatly reducing the composite action between the flange and the web. After

Kent K. Sasaki; Terry Paret; Juan C. Araiza; Peder Hals

2010-01-01

352

Orbiter Flight Deck Redesign (A Physical Layout for a Futuristic Flight Deck)  

NASA Technical Reports Server (NTRS)

The purpose of this summer project was to develop a set of schematic drawings for redesign of the Space Shuttle flight deck from which three dimensional computer drawings can be built and viewed in a virtual environment. In order to achieve this goal, first recommendations for overall redesign of Space Shuttle previously made by experts in the field were reviewed and relevant information was extracted and delineated. Original drawings of the Space Shuttle made by Rockwell were obtained and carefully examined. In order to implement and assess any modifications in terms of space saving parameters, it was determined that the drawings alone could not achieve this objective. As a complement, physical measurements of the mockup of Space Shuttle flight deck were made and the information was categorized and properly labeled on the original drawings. Then, spacesaving redesign ideas, as motivated by expert recommendations on such things as information display panel upgrade by technologically advanced flat display units, were implemented. Next, the redesign ideas were executed on the Forward flight deck, Overhead Console, Right and Left Console, and Center Console. A new 3-D computer drawing of this was developed by modifying the existing drawing on the in-house developed software (PLAID). Finally, the drawing was transported to a Virtual Environment and observed.

Khorsandi, Mehrzad

1996-01-01

353

Konigsberg Bridge  

NSDL National Science Digital Library

The webpage provides an overview of how the Konigsberg Bridge problem led Euler to develop graph theory and establish the basis for topology. The page includes links to images of the bridge. It also includes an animated image which converts the map of Konigsberg into a graph.

2010-07-30

354

Straw Bridges  

NSDL National Science Digital Library

Working as engineering teams, students design and create model beam bridges using plastic drinking straws and tape as their construction materials. Their goal is to build the strongest bridge with a truss pattern of their own design, while meeting the design criteria and constraints. They experiment with different geometric shapes and determine how shapes affect the strength of materials. Let the competition begin!

Integrated Teaching And Learning Program

355

Active Bridging  

Microsoft Academic Search

Active networks accelerate network evolution by permitting the network infrastructure to be programmable, on a per-user, per-packet, or other basis. This programmability must be balanced against the safety and security needs inherent in shared resources.This paper describes the design, implementation, and performance of a new type of network element, an Active Bridge. The active bridge can be reprogrammed \\

D. Scott Alexander; Marianne Shaw; Scott M. Nettles; Jonathan M. Smith

1997-01-01

356

46 CFR 171.140 - Drainage of a flush deck vessel.  

Code of Federal Regulations, 2013 CFR

...RULES PERTAINING TO VESSELS CARRYING PASSENGERS Drainage of Weather Decks § 171.140 Drainage of a flush deck vessel. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel must be watertight and have...

2013-10-01

357

46 CFR 171.140 - Drainage of a flush deck vessel.  

Code of Federal Regulations, 2011 CFR

...RULES PERTAINING TO VESSELS CARRYING PASSENGERS Drainage of Weather Decks § 171.140 Drainage of a flush deck vessel. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel must be watertight and have...

2011-10-01

358

46 CFR 171.140 - Drainage of a flush deck vessel.  

Code of Federal Regulations, 2010 CFR

...RULES PERTAINING TO VESSELS CARRYING PASSENGERS Drainage of Weather Decks § 171.140 Drainage of a flush deck vessel. (a) Except as provided in paragraph (b) of this section, the weather deck on a flush deck vessel must be watertight and have...

2010-10-01

359

COLORADO DEPARTMENT OF TRANSPORTATION Sustainability of Concrete Pavement  

E-print Network

COLORADO DEPARTMENT OF TRANSPORTATION Sustainability of Concrete Pavement I-225 - Mississippi to 6 · 2 Mile Reconstruction Existing: · 4 Lane Divided Highway · 8" Concrete Pavement (Recycled on-site) · 4" Asphalt Overlay (Recycled off-site) Project Design: · 6 Lane Divided Highway · 13" Concrete

360

211. EQUIPMENT LAYING FIRST LANE OF CONCRETE PAVEMENT NEAR THE ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

211. EQUIPMENT LAYING FIRST LANE OF CONCRETE PAVEMENT NEAR THE CAPITAL OVERLOOK, 1931. NOTE THE BEGINNING OF BITUMINOUS TYPE OF TEMPORARY PAVEMENT TO ALLOW FOR SETTLEMENT IN HYDRAULIC FILL AREAS. - George Washington Memorial Parkway, Along Potomac River from McLean to Mount Vernon, VA, Mount Vernon, Fairfax County, VA

361

Full-Depth Asphalt Pavements for Parking Lots and Driveways.  

ERIC Educational Resources Information Center

The latest information for designing full-depth asphalt pavements for parking lots and driveways is covered in relationship to the continued increase in vehicle registration. It is based on The Asphalt Institute's Thickness Design Manual, Series No. 1 (MS-1), Seventh Edition, which covers all aspects of asphalt pavement thickness design in detail,…

Asphalt Inst., College Park, MD.

362

Airport pavement management systems: an appraisal of existing methodologies  

Microsoft Academic Search

Airport pavement management systems (APMS) are computer-based decision support systems that can be used by the agencies running airports to determine cost-effective maintenance and rehabilitation strategies to preserve the various pavement structures (runways, taxiways, etc.) which are a critical component of these facilities. In this paper, we describe the main elements of APMS and review existing systems.

Michel Gendreau; Patrick Soriano

1998-01-01

363

Experimental study on properties of pervious concrete pavement materials  

Microsoft Academic Search

In this paper, a pervious concrete pavement material used for roadway is introduced. Using the common material and method, the strength of the pervious concrete is low. Using smaller sized aggregate, silica fume (SF), and superplasticizer (SP) in the pervious concrete can enhance the strength of pervious concrete greatly. The pervious pavement materials that composed of a surface layer and

Jing Yang; Guoliang Jiang

2003-01-01

364

Fracture resistance characterization of chemically modified crumb rubber asphalt pavement  

Microsoft Academic Search

The fracture resistance of chemically modified crumb rubber asphalt (CMCRA) pavement was evaluated based on the J-integral concept. The chemical modification process used was developed by the Federal Highway Administration and patented in 1998. The results were compared to that of crumb rubber asphalt (CRA) and control asphalt pavement. Four semi-circular core specimens (76 mm radius and 57 mm thickness)

M. A. Mull; K. Stuart; A. Yehia

2002-01-01

365

Portland Cement Concrete Pavement Shannon Golden, Alabama DOT  

E-print Network

be measured by weight. The substitution of each mineral admixture (GGBFS, Fly Ash, Silica Fume) for Portland* (Maximum % Substitution) Fly Ash (Maximum % Substutution) Silica Fume (Maximum % Substitution) 50 % 0 % 0Portland Cement Concrete Pavement Shannon Golden, Alabama DOT PORTLAND CEMENT CONCRETE PAVEMENT

366

Subgrade Temperature and Freezing Cycles in Pervious Pavements  

Microsoft Academic Search

With the construction of four new test cells in 2008, the Minnesota Department of Transportation (Mn\\/DOT) now has six unique pervious pavement test sections at the MnROAD test facility. Recorded temperatures in the pervious pavements and subgrades were compared to impervious Portland Cement Concrete (PCC) test sections over the same time interval. It was found that the subgrade in pervious

R. J. Rohne; M. A. Lebens

367

Regular Inspection and Maintenance Guidance for Porous Pavements  

E-print Network

. Signage should display limitation of design load (i.e. passenger vehicles only, light truck traffic, etc the pavement in accordance with the minimum design standards. This page provides guidance on maintenance non-design loads. Damaged areas may be repaired by use of infrared heating and rerolling of pavement

368

Influence of vehicular positions and thermal effects on structural behaviour of concrete pavement  

Microsoft Academic Search

Structural response of concrete pavements is influenced by the position of the axle loads and if critical load positions are not considered in concrete pavement analysis, the design may be inadequate and lead to early failure of the pavement. Whilst there has been a great deal of research conducted on concrete pavement performance and deterioration under vehicular loads and environmental

David P. Thambiratnam; Andreas Nataatmadja; Daksh Baweja

369

Effect of pavement temperature on the macrotexture of a semidense asphalt surface  

E-print Network

Effect of pavement temperature on the macrotexture of a semidense asphalt surface J. Luong, M the pavement temperature could change the texture surface of the pavement. The aim of this work is to analyze the influence of the surface temperature on the macrotexture of a semidense asphalt pavement located in an urban

Boyer, Edmond

370

Lower bound shakedown analysis of layered pavements using discontinuous stress fields  

Microsoft Academic Search

Pavements and railways are subjected to repeated wheel loads of different magnitudes. Both load magnitudes and number of repetitions of load need to be considered in order to avoid significant damages to a pavement. A conventional finite element technique is convenient for calculating static pavement responses, but the prediction of pavement performance under repeated loading is much more difficult as

H. S. Yu; M. Z. Hossain

1998-01-01

371

Project Information Form Project Title White Paper on The application of permeable pavement with emphasis  

E-print Network

Project Information Form Project Title White Paper on The application of permeable pavement Project Depending on the type of surface pavement, permeable pavement can be termed as porous asphalt and improve water quality as well as urban heat island, the application of permeable pavement in urban areas

California at Davis, University of

372

Principles of bituminous pavement design and the recent trends Animesh Das1  

E-print Network

Principles of bituminous pavement design and the recent trends Animesh Das1 Introduction Understanding pavement behaviour is a complex task. This complexity is due to the complex response of the individual pavement materials which is very difficult to predict. In a typical pavement a number

Das, Animesh

373

The impact of fine aggregate characteristics on asphalt concrete pavement design life  

Microsoft Academic Search

The development of the Mechanistic–Empirical Pavement Design Guide (MEPDG) provides an opportunity to simulate the performance of pavements. This paper considers the impact of fine aggregate on the predicted performances of pavements by simulating the performance differences between pavement mixes prepared with different sources of fine aggregate with different gradations using the MEPDG. A natural and four manufactured sands from

Tamer M. Breakah; Jason P. Bausano; R. Christopher Williams; Stan Vitton

2011-01-01

374

Stiffness characterisation of full-scale airfield test pavements using computational intelligence techniques  

Microsoft Academic Search

The falling weight deflectometer (FWD) is a non-destructive test equipment used to assess the structural condition of highway and airfield pavement systems and to determine the moduli of pavement layers. The backcalculated moduli are not only good pavement layer condition indicators but are also necessary inputs for conducting mechanistic based pavement structural analysis. In this study, artificial neural networks (ANNs)-based

Kasthurirangan Gopalakrishnan; Halil Ceylan

2008-01-01

375

19. Main deck just forward of fish batch, portion of ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

19. Main deck just forward of fish batch, portion of fish hatch cover has been opened to show the ventilation grate below. - Schooner "Lettie G. Howard", South Street Seaport Museum, New York, New York County, NY

376

46 CFR 108.487 - Helicopter deck fueling operations.  

Code of Federal Regulations, 2011 CFR

...SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Fire Extinguishing Systems Fire Protection...helicopter deck. Each hose that discharges foam must have a nozzle that has foam stream, foam spray, and off...

2011-10-01

377

46 CFR 108.487 - Helicopter deck fueling operations.  

Code of Federal Regulations, 2013 CFR

...SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Fire Extinguishing Systems Fire Protection...helicopter deck. Each hose that discharges foam must have a nozzle that has foam stream, foam spray, and off...

2013-10-01

378

46 CFR 108.487 - Helicopter deck fueling operations.  

Code of Federal Regulations, 2010 CFR

...SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Fire Extinguishing Systems Fire Protection...helicopter deck. Each hose that discharges foam must have a nozzle that has foam stream, foam spray, and off...

2010-10-01

379

46 CFR 108.487 - Helicopter deck fueling operations.  

Code of Federal Regulations, 2012 CFR

...SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Fire Extinguishing Systems Fire Protection...helicopter deck. Each hose that discharges foam must have a nozzle that has foam stream, foam spray, and off...

2012-10-01

380

19. DECK VIEW LOOKING FORWARD WITH MAST, RIGGING AND BOWSPRIT ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

19. DECK VIEW LOOKING FORWARD WITH MAST, RIGGING AND BOWSPRIT DETAILS - HATCH COVER REMOVED TO SHOW CENTERBOARD TRUNK - KATHRYN-Two-sail Bateau "Skipjack", Dogwood Harbor, Chesapeake Bay, Tilghman, Talbot County, MD

381

Crewmembers photographing the Earth from the aft flight deck windows.  

NASA Technical Reports Server (NTRS)

Mission Pilot Mike Baker and Mission Specialist Tamara Jernigan looking out the aft flight deck overhead windows and photographing the Earth below. Jernigan is looking out the window while Baker is photographing with a Hasselblad 70mm camera.

1992-01-01

382

Trestle Reflected Framing Plan, Trestle Deck Plan, Trestle Framing Plan ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Trestle Reflected Framing Plan, Trestle Deck Plan, Trestle Framing Plan - Denver & Rio Grande Railroad, San Juan Extension, Wolf Creek Trestle, Crossing Wolf Creek at Milepost 339.78, Chama, Rio Arriba County, NM

383

11. DETAIL SHOWING ROLLING ENGINE DECK AND NORTHEAST TRUSS OF ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

11. DETAIL SHOWING ROLLING ENGINE DECK AND NORTHEAST TRUSS OF SUPERSTRUCTURE. Looking northeast. - Edwards Air Force Base, Air Force Rocket Propulsion Laboratory, Test Stand 1-A, Test Area 1-120, north end of Jupiter Boulevard, Boron, Kern County, CA

384

8. SOUTH REAR, SUPERSTRUCTURE. Looking north from deck. Edwards ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

8. SOUTH REAR, SUPERSTRUCTURE. Looking north from deck. - Edwards Air Force Base, Air Force Rocket Propulsion Laboratory, Test Stand 1-A, Test Area 1-120, north end of Jupiter Boulevard, Boron, Kern County, CA

385

View south, wharf B, showing western docking structure, decking detail ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View south, wharf B, showing western docking structure, decking detail - U.S. Coast Guard Sandy Hook Station, Western Docking Structure, West of intersection of Canfield Road & Hartshorne Drive, Highlands, Monmouth County, NJ

386

View south, wharf A decking detail, sawn off section (ordnance ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View south, wharf A decking detail, sawn off section (ordnance wharf), timber breakwater - U.S. Coast Guard Sandy Hook Station, Western Docking Structure, West of intersection of Canfield Road & Hartshorne Drive, Highlands, Monmouth County, NJ

387

View northeast, wharf A decking detail, showing floor of former ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View northeast, wharf A decking detail, showing floor of former light attendant station (las) or boathouse - U.S. Coast Guard Sandy Hook Station, Western Docking Structure, West of intersection of Canfield Road & Hartshorne Drive, Highlands, Monmouth County, NJ

388

Structural loading of cross deck connections for trimaran vessels  

E-print Network

This work investigates the fundamental relationships of wave loading on cross deck structures for trimaran vessels. In contrast with a monohull ship, trimaran vessels experience several possible structural loading cases ...

Rhoads, Jason L

2004-01-01

389

4. TOPSIDE VIEW FROM UPPER DECK LOOKING DOWN INTO TANK ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. TOPSIDE VIEW FROM UPPER DECK LOOKING DOWN INTO TANK WITH SHUTTLE CARGO BAY MOCK-UP AT BOTTOM OF 40 FOOT TANK. - Marshall Space Flight Center, Neutral Buoyancy Simulator Facility, Rideout Road, Huntsville, Madison County, AL

390

5. TOPSIDE VIEW FROM UPPER DECK LOOKING DOWN INTO TANK ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

5. TOPSIDE VIEW FROM UPPER DECK LOOKING DOWN INTO TANK WITH SHUTTLE CARGO BAY MOCK-UP AT BOTTOM OF 40 FOOT TANK. - Marshall Space Flight Center, Neutral Buoyancy Simulator Facility, Rideout Road, Huntsville, Madison County, AL

391

8. VIEW, LOOKING EAST OF OPERATOR DECK, SHOWING TRASHRAKE HOIST, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

8. VIEW, LOOKING EAST OF OPERATOR DECK, SHOWING TRASH-RAKE HOIST, LEVER CONTROLS, MOTOR CONTROLLER - Cabot Station Electric Generating Plant, Gantry Crane, Montague City Road, Turners Falls vicinity, Montague, Franklin County, MA

392

6. VIEW, LOOKING SOUTH OF OPERATOR DECK, SHOWING MOTOR CONTROLS ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

6. VIEW, LOOKING SOUTH OF OPERATOR DECK, SHOWING MOTOR CONTROLS AND LEVERS AND HOIST FOR TRASH RAKE - Cabot Station Electric Generating Plant, Gantry Crane, Montague City Road, Turners Falls vicinity, Montague, Franklin County, MA

393

17. VIEW FROM OPERATOR DECK, SHOWING TRASH RACKS, CHUTES, AND ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

17. VIEW FROM OPERATOR DECK, SHOWING TRASH RACKS, CHUTES, AND HEADGATE COVERS, LOOKING NORTH - Cabot Station Electric Generating Plant, Gantry Crane, Montague City Road, Turners Falls vicinity, Montague, Franklin County, MA

394

23. STEAM PLANT TURBINE DECK FROM NORTH END OF BUILDING, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

23. STEAM PLANT TURBINE DECK FROM NORTH END OF BUILDING, SHOWING FOURTH STEAM UNIT IN PLACE AT FAR SOUTH END. April 6, 1950 - Crosscut Steam Plant, North side Salt River near Mill Avenue & Washington Street, Tempe, Maricopa County, AZ

395

37. View aft of port side of main deck taken ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

37. View aft of port side of main deck taken from just aft of midship house, showing main hatch, mainmast and poop bulkhead. - Ship BALCLUTHA, 2905 Hyde Street Pier, San Francisco, San Francisco County, CA

396

42. View from forward end of poop deck, port side, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

42. View from forward end of poop deck, port side, looking aft toward poop capstan, booby hatch, and mizzenmast. Photograph by Russell Booth, June 1989. - Ship BALCLUTHA, 2905 Hyde Street Pier, San Francisco, San Francisco County, CA

397

8. Working decks for buoy maintenance. White Sage on left, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

8. Working decks for buoy maintenance. White Sage on left, White Holly on right. - U.S. Coast Guard Cutter WHITE HOLLY, U.S. Coast Guard 8th District Base, 4640 Urquhart Street, New Orleans, Orleans Parish, LA

398

6. DECK #4 TOPSIDE FROM NORTHEAST CORNER END PIECE FOR ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

6. DECK #4 TOPSIDE FROM NORTHEAST CORNER END PIECE FOR ROBOTIC ARM FOR ANCHORING ASTRONAUT FOR MECHANICAL WORK. - Marshall Space Flight Center, Neutral Buoyancy Simulator Facility, Rideout Road, Huntsville, Madison County, AL

399

46 CFR 11.910 - Subjects for deck officer endorsements.  

Code of Federal Regulations, 2010 CFR

...MARINE OFFICERS AND SEAMEN REQUIREMENTS FOR OFFICER ENDORSEMENTSSubjects of Examinations and Practical Demonstrations of Competence § 11.910Subjects for deck officer endorsements. Table 11.910-1 gives the codes used in table...

2010-10-01

400

An analysis of pavement heat flux to optimize the1 water efficiency of a pavement-watering method2  

E-print Network

of cooling dense urban areas and reducing the urban heat11 island effect has been studied since the 1990's; pavement heat flux; pavement-watering; urban heat island; climate change25 adaptation; heat wave26 1 [3], this technique is viewed as an efficient means of reducing urban31 heat island (UHI) intensity

Paris-Sud XI, Université de

401

General view of he forward wall of the mid deck ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

General view of he forward wall of the mid deck of the Orbiter Discovery. In this view a majority of wall panels have been removed to reveal the avionics bays in the interstitial space between the mid deck forward wall and the forward bulkhead of the pressurized crew compartment. This photograph was taken at Kennedy Space Center. - Space Transportation System, Orbiter Discovery (OV-103), Lyndon B. Johnson Space Center, 2101 NASA Parkway, Houston, Harris County, TX

402

North Landing (can also deck along  

E-print Network

and dissected on south half. Wood north of creek goes to north landing; wood south of creek goes to south - conifers/hardwoods PB6 - Paper Birch S6 - Spruce Open Creek Haul Road New Ski Trails Landing#0 Temp Bridge

403

Evaluation of flexible pavement performance life in Florida. Final research report, October 1993--June 1998  

SciTech Connect

The pavement performance life provides information on how long a particular pavement type will typically last before it needs rehabilitation. This study presents the research effort to estimate the average flexible pavement performance life in Florida. Two data files of Pavement Condition Survey (PCS) and Work Program Administration (WPA) were used for this study. SAS programs were applied to analyze and manipulate these two data files. The pavement performance condition curves were developed for a large sample size of pavement sections based on the polynomial model. The average pavement performance lives were evaluated for each pavement group based on the performance curves. The results of the evaluation showed that the primary system had longer average performance life than the interstate system. Generally, the polynomial model performed well in fitting the data. The pavement performance curve indicates that if M and R are performed while the pavement is still in the `slow rate of deterioration` phase, life cycle cost may be reduced.

Ping, W.V.; He, Y.

1998-06-01

404

Spaghetti Bridge  

NSDL National Science Digital Library

Play with your food while learning about engineering! Build a spaghetti bridge, then test its strength by piling on the marshmallows, raw spaghetti, raw linguine and coins. Investigate the difference between the strength of bridges made from flat and round building materials (spaghetti is round, while linguine is flat). Learn by doing that circles are among the strongest shapes in nature, and that external and internal stress distributes itself evenly throughout a round structure.

Sciencenter

1999-01-01

405

Procedure and Application for Determining the Cold Deck and Hot Deck Airflow in a Dual-Duct System  

E-print Network

and hot deck. The supply fan speed is controlled to meet the calculated load requirement. This new technology will improve the supply fan speed control and save energy. A case study was demonstrated in a commercial building during continuous commissioning...

Liu, G.; Mingsheng, L.

2006-01-01

406

Tire Footprint Affects Hydroplaning On Wet Pavement  

NASA Technical Reports Server (NTRS)

Recent investigations of tire hydroplaning at highway speeds reveal, in addition to inflation pressure, tire-footprint aspect ratio (FAR), defined as width divided by length of tire surface in contact with pavement, significantly influences speed at which dynamic hydroplaning begins. Tire speeds and forces developed during tests of up to 65 mi/h (105 km/h) were monitored on flooded test surface to identify development of hydroplaning. Study focused on automotive tires because FAR's of automotive tires vary more than those of aircraft tires.

Yager, Thomas J.

1989-01-01

407

The new Mechanistic-Empirical Pavement Design Guide (MEPDG) developed under the National Cooperative Highway Research Program (NCHRP) Project 1-37A represents a major change as compared to the 1993 AASHTO Pavement  

E-print Network

The new Mechanistic-Empirical Pavement Design Guide (MEPDG) developed under the National AASHTO Pavement Design Guide. MEPDG provides a rational pavement design framework based on the pavement performance. Before replacing the 1993 Pavement Design Guide (and its accompanying DARWin 3

Harms, Kyle E.

408

Design and Construction Integration of a Continuous Precast Prestressed Concrete Bridge System  

E-print Network

for the operational vehicular loading as provided by TTI and a number of design alternatives for the various bridge components are provided. This includes: the design of the fully precast deck panels for long continuous spans, design of the shear connectors resisting...

Roy, Subha Lakshmi 1982-

2011-04-15

409

Southview Bridge Rehabilitation in Rolla, MO. Volume 1: Design and Construction.  

National Technical Information Service (NTIS)

A research project was undertaken to evaluate the use of post-tensioned FRP for bridge-deck construction. This type of structure selected for this project is a four-span continuous concrete slab having GFRP bars for top and bottom mats and CFRP reinforcem...

R. Fico, N. Galati, A. Prota, A. Nanni

2006-01-01

410

Tracking of cracks in bridges using GPR: a 3D approach  

NASA Astrophysics Data System (ADS)

Corrosion associated with reinforcing bars is the most significant contributor to bridge deficiencies. The corrosion is usually caused by moisture and chloride ion exposure. In particular, corrosion products FeO, Fe2O3, Fe3O4 and other oxides along reinforcement bars. The reinforcing bars are attacked by corrosion and yield expansive corrosion products. These oxidation products occupy a larger volume than the original intact steel and internal expansive stresses lead to cracking and debonding. There are some conventional inspection methods for detection of reinforcing bar corrosion but they can be invasive and destructive, often laborious, lane closures is required and it is difficult or unreliable any quantification of corrosion. For these reasons, bridge engineers are always more preferring to use the Ground Penetrating Radar (GPR) technique. In this work a novel numerical approach for three dimensional tracking and mapping of cracks in the bridge is proposed. The work starts from some interesting results based on the use of the 3D imaging technique in order to improve the potentiality of GPR to detect voids, cracks or buried object. The numerical approach has been tested on data acquired on some bridges using a pulse GPR system specifically designed for bridge deck and pavement inspection that is called RIS Hi Bright. The equipment integrates two arrays of Ultra Wide Band ground coupled antennas, having a main working frequency of 2 GHz. The two arrays within the RIS Hi Bright are using antennas arranged with different polarization. One array includes sensors with parallel polarization with respect to the scanning direction (VV array), the other has sensors in orthogonal polarization (HH array). Overall the system collects 16 profiles within a single scan (8 HH + 8 VV). The cracks, associated often to moisture increasing and higher values of the dielectric constant, produce a not negligible increasing of the signal amplitude. Following this, the algorithm processes the signal by comparing the value of the amplitude A(i,j,k) in the position of the 3D domain i,j,k all over the GPR scan with a threshold T(k), that depends on the depth k. The value of the threshold, that is variable in order to compensate attenuation effects, has been calibrated all over the depth of the scan comparing the real truth with the GPR prediction. The algorithm analyzes the signal amplitude all over the domain of the radar scan for i=1,N (longitudinal length of the scan), for j==1,M (transversal length of the scan) and for k=1,L (depth of the scan), where N, M, L are the boundary domain limits. Starting from the generic position of the scan where the algorithm finds a signal amplitude greater than the threshold, A(i,j,k)>T(k), the 6 positions, left (j-1), right (j+1), up (k-1), down (k+1), forward (i+1) and backward (i-1), are checked in order to find the position where the amplitude reaches the maximum value Amax(i*,j*,k*). Of course this value must be over the threshold T(k*) to be accepted as belonging to the crack. At the next step the algorithm restarts the tracking procedure assuming Amax(i*,j*,k*) as the new generic value A(i,j,k). The procedure ends as the entire domain has been numerically scanned.

Benedetto, A.

2012-04-01

411

Structural health monitoring of composite repair patches in bridge rehabilitation  

NASA Astrophysics Data System (ADS)

In recent years, there are many issues involving safety on old bridges, aircrafts and other structures, which threaten the lives of the people using those structures, as well as the structures themselves. To prevent future failure, various measures are being taken. Structure rehabilitations with carbon fiber reinforced composite patches have been adopted and demonstrated to be an excellent way to enhance/repair the structures and prolong the service life. However, there are still many problems residing in this kind of technology that remain unsolved, for example, the failure of the interface between composite repair patches and their host structures. This is a critical issue that must be addressed in order to show the viability of composite patches. In order to study debond occurring between composite repair patches and their host structures, a structure health monitoring scheme was demonstrated on a concrete bridge model in the laboratory. The system is based on active sensing with diagnostic lamb waves, in which piezoelectric transducers are used as both sensors and actuators. In the test, six SMART Layers, each having eight piezoelectirc transducers, were integrated with two composite repair strips on the deck slab of the concrete bridge model. For the three diagnostic layers with each composite repair patch, two layers were bonded on the top surface of the patch, and the other is embedded at the interface between the composite repair patch and the deck slab of the concrete bridge model. The loading procedure of the test included three phases. First, the bridge model was preloaded to initiate cracks on the deck slabs and the repair patches were then implemented. Second, the load was raised to reach the shear capacity of the girders of the bridge model and then the repair patches were implemented on those girders. Lastly, the structure was loaded to damage the deck slabs. During the test, the initiation and development of debond between composite repair patches and deck slabs were clearly revealed by the active sensing system. It was demonstrated that the active sensing system employed is prompt, robust and a precise technique to monitor the debond process of the composite repair patches for structural rehabilitation. Besides the study of the mechanism of debond between repair patch and host structures, an on line health monitoring system can give the user an indication of the structural health status and alert technicians when it approaches the failure capacity.

Wu, Zhanjun; Ghosh, Kumar; Qing, Xinlin; Karbhari, Vistasp; Chang, Fu-Kuo

2006-03-01

412

Performance-Based Concrete Pavement Mix Design System Performance-Based Design Guide for New and Rehabilitated  

E-print Network

Strategic Research Plan #12;· Performance-Based Concrete Pavement Mix Design System · Performance-Based Design Guide for New and Rehabilitated Concrete Pavements · High-Speed Nondestructive Testing Pavements · High-Speed Concrete Pavement Rehabilitation and Construction · Concrete Pavement Business

413

Evaluation of base widening methods on flexible pavements in Wyoming  

NASA Astrophysics Data System (ADS)

The surface transportation system forms the biggest infrastructure investment in the United States of which the roadway pavement is an integral part. Maintaining the roadways can involve rehabilitation in the form of widening, which requires a longitudinal joint between the existing and new pavement sections to accommodate wider travel lanes, additional travel lanes or modification to shoulder widths. Several methods are utilized for the joint construction between the existing and new pavement sections including vertical, tapered and stepped joints. The objective of this research is to develop a formal recommendation for the preferred joint construction method that provides the best base layer support for the state of Wyoming. Field collection of Dynamic Cone Penetrometer (DCP) data, Falling Weight Deflectometer (FWD) data, base samples for gradation and moisture content were conducted on 28 existing and 4 newly constructed pavement widening projects. A survey of constructability issues on widening projects as experienced by WYDOT engineers was undertaken. Costs of each joint type were compared as well. Results of the analyses indicate that the tapered joint type showed relatively better pavement strength compared to the vertical joint type and could be the preferred joint construction method. The tapered joint type also showed significant base material savings than the vertical joint type. The vertical joint has an 18% increase in cost compared to the tapered joint. This research is intended to provide information and/or recommendation to state policy makers as to which of the base widening joint techniques (vertical, tapered, stepped) for flexible pavement provides better pavement performance.

Offei, Edward

414

Pavement cracking measurements using 3D laser-scan images  

NASA Astrophysics Data System (ADS)

Pavement condition surveying is vital for pavement maintenance programs that ensure ride quality and traffic safety. This paper first introduces an automated pavement inspection system which uses a three-dimensional (3D) camera and a structured laser light to acquire dense transverse profiles of a pavement lane surface when it carries a moving vehicle. After the calibration, the 3D system can yield a depth resolution of 0.5 mm and a transverse resolution of 1.56 mm pixel-1 at 1.4 m camera height from the ground. The scanning rate of the camera can be set to its maximum at 5000 lines s-1, allowing the density of scanned profiles to vary with the vehicle's speed. The paper then illustrates the algorithms that utilize 3D information to detect pavement distress, such as transverse, longitudinal and alligator cracking, and presents the field tests on the system's repeatability when scanning a sample pavement in multiple runs at the same vehicle speed, at different vehicle speeds and under different weather conditions. The results show that this dedicated 3D system can capture accurate pavement images that detail surface distress, and obtain consistent crack measurements in repeated tests and under different driving and lighting conditions.

Ouyang, W.; Xu, B.

2013-10-01

415

Use of lug anchors to related pavement movement  

NASA Astrophysics Data System (ADS)

Minnesota Department of Transporatation's policy is that grades in the 3 to 5 percent and greater range are steep and may require lug anchors. Standard lug anchor spacing varies from 150 feet, center to center, for 3 percent grades to 75 feet, center to center, for 5 percent and greater grades. Conclusions are: (1) that lug anchors do prevent the downhill movement of the concrete pavement; (2) that when lug anchors are used a perforated pipe system also be built to collect the surface water that enters the pavement structure thus eliminating the anticipated base pumping and pavement settlement.

Oakey, S. A.

1980-04-01

416

An advanced algorithm for highway pavement fissure detection  

NASA Astrophysics Data System (ADS)

This paper presents image detection method of pavement crack based on fractal dimension feature and designs self-adapting algorithm of fractal dimension interval of pavement region. Through image pretreatment, calculation of fractal dimension, self-adapting calculation of dimension interval, we obtain the location image of damage pavement. The experimental results of transverse crack, longitudinal crack, net-shaped crack, pit slot are contrast with that of Sobel operator. The results show that they have the similar capability on the representation of crack, but the proposed method is more flexible on the aspect of representation of crack size and calculation of damage ratio.

Chen, Bei; Cao, Wenlun; He, Yuyao

2012-04-01

417

Basswood Bridges  

NSDL National Science Digital Library

The Elementary Engineering Design course for freshmen students at Purdue University Calumet consists of two components: one ME and one EE. Due to the two part structure and in order to expose the students to the faculty, it is also team taught. The course counts as two credits, with the format one hour lecture and three hours lab. The basswood bridge is the major project of the ME half and counts for one quarter of the total course grade. The object, as is usual with bridge projects, is to design, build and test a truss bridge having a high strength to weight ratio. The design process includes statics analysis in combination with the tensile and compressive properties of the basswood. The details of the project from initial design to final testing are provided.

Abramowitz, Harvey

2009-09-16

418

Linking Bridges  

NSDL National Science Digital Library

This blog post presents three puzzles which provide an opportunity for learners to use the strategy of trial and error and logical reasoning. The challenge is to connect all of the islands with bridges so that the number on the island corresponds to the number of bridges going to it or from it. This activity also provides the opportunity for students to be puzzle designers by including a blank grid page on which students can design their own versions of the puzzle to share with classmates.

Young, David

2014-01-28

419

Road Materials and Pavements Design. Volume X No X/2013, pages 1 to n Review of glass fiber grid use for pavement  

E-print Network

Road Materials and Pavements Design. Volume X No X/2013, pages 1 to n Review of glass fiber grid use for pavement reinforcement and APT experiments at IFSTTAR Mai Lan Nguyen* Juliette Blanc* Jean performance, to extend service life and thus to reduce maintenance costs of road pavements. Among a large

Paris-Sud XI, Université de

420

Truck-based mobile wireless sensor networks for the experimental observation of vehicle-bridge interaction  

NASA Astrophysics Data System (ADS)

Heavy vehicles driving over a bridge create a complex dynamic phenomenon known as vehicle-bridge interaction. In recent years, interest in vehicle-bridge interaction has grown because a deeper understanding of the phenomena can lead to improvements in bridge design methods while enhancing the accuracy of structural health monitoring techniques. The mobility of wireless sensors can be leveraged to directly monitor the dynamic coupling between the moving vehicle and the bridge. In this study, a mobile wireless sensor network is proposed for installation on a heavy truck to capture the vertical acceleration, horizontal acceleration and gyroscopic pitching of the truck as it crosses a bridge. The vehicle-based wireless monitoring system is designed to interact with a static, permanent wireless monitoring system installed on the bridge. Specifically, the mobile wireless sensors time-synchronize with the bridge's wireless sensors before transferring the vehicle response data. Vertical acceleration and gyroscopic pitching measurements of the vehicle are combined with bridge accelerations to create a time-synchronized vehicle-bridge response dataset. In addition to observing the vehicle vibrations, Kalman filtering is adopted to accurately track the vehicle position using the measured horizontal acceleration of the vehicle and positioning information derived from piezoelectric strip sensors installed on the bridge deck as part of the bridge monitoring system. Using the Geumdang Bridge (Korea), extensive field testing of the proposed vehicle-bridge wireless monitoring system is conducted. Experimental results verify the reliability of the wireless system and the accuracy of the vehicle positioning algorithm.

Kim, Junhee; Lynch, Jerome P.; Lee, Jong-Jae; Lee, Chang-Geun

2011-06-01

421

The failure of the Tacoma Bridge: A physical model  

NASA Astrophysics Data System (ADS)

The cause of the collapse of the Tacoma Narrows Bridge has been a topic of much debate and confusion over the years. Many mischaracterizations of the observed phenomena have limited the understanding of the collapse even though there has always been an abundance of evidence in favor of a negative damping model. Negative damping, or positive feedback, is responsible for large amplitude oscillations in many systems, from musical instruments to the Tacoma Narrows Bridge failure. We discuss some of the more well known examples of positive feedback, and then show how the interaction of the wind with the oscillating bridge, especially the development of large scale vortices above and below the deck of the bridge, led to such a positive feedback instability. We support our model by computational, experimental, and historical data.

Green, Daniel; Unruh, William G.

2006-08-01

422

Asphalt Pavement Aging and Temperature Dependent Properties through a Functionally Graded Viscoelastic Model, Part-I: Development,  

E-print Network

Asphalt Pavement Aging and Temperature Dependent Properties through a Functionally Graded simulations, correspondence principle, finite-element method Abstract. Asphalt concrete pavements to climatic conditions are the major cause of such graded non-homogeneity. Current pavement analysis

Paulino, Glaucio H.

423

3-D Seismic Methods for Shallow Imaging Beneath Pavement  

E-print Network

The research presented in this dissertation focuses on survey design and acquisition of near-surface 3D seismic reflection and surface wave data on pavement. Increased efficiency for mapping simple subsurface interfaces ...

Miller, Brian

2013-05-31

424

Implications of reliability in mechanistic/empirical pavement design applications  

E-print Network

At present there are many design procedures for both asphalt and concrete pavement structures. The object of any one of these design procedures being to produce a quality riding structure that will satisfy the design engineer and the riding public...

Killingsworth, Brian Mark

2012-06-07

425

Long-Life Concrete Pavements in Europe and Canada.  

National Technical Information Service (NTIS)

Long-life concrete pavements require less frequent repair and rehabilitation and contribute to highway safety and congestion mitigation. The Federal Highway Administration, American Association of State Highway and Transportation Officials, and National C...

A. Correa, D. Dawood, K. Hall, R. Tally, S. Vanikar, T. Cackler

2007-01-01

426

Las Cruces International Airport (LRU) Pavement Condition and Analysis  

E-print Network

. Design Aircraft Used for Runway Pavement Design 20 1. Las Cruces International Airport (LRU) Aircraft Operations (2008-09) 5 .........Table 2. Las Cruces International Airport (LRU) Predicted Aircraft Operations 2007-2027 6 .............Figure 2. Las

Cal, Mark P.

427

Clayton Municipal Airport (CAO) Pavement Condition and Analysis  

E-print Network

;........................................................................................4. Recommend Pavement Design 19 .........................................Table 5. Design Aircraft Used Airport (CAO) Aircraft Operations (2005-2009) 5 .....Table 2. Clayton Municipal Airport (CAO) Predicted Aircraft Operations 2007-2027 6 ..................Figure 2. Clayton Municipal Airport (CAO) PCI Branch Map

Cal, Mark P.

428

Double Eagle II Airport (AEG) Pavement Condition and Analysis  

E-print Network

........................................................................................4. Recommend Pavement Design 17 .........................................Table 5. Design Aircraft. Double Eagle II (AEG) Aircraft Operations (2006) 5 .......................Table 2. Double Eagle II (AEG) Predicted Aircraft Operations 2010-2025 6 ..................................................Figure 2. Double

Cal, Mark P.

429

Moriarty Municipal Airport (0E0) Pavement Condition and Analysis  

E-print Network

. Design Aircraft Used for Runway Pavement Design 20 ..................................................Table 1. Moriarty Airport (0E0) Aircraft Operations (2007-2008) 5 ....................................Table 2. Moriarty Airport (0E0) Predicted Aircraft Operations 2007-2027 6

Cal, Mark P.

430

Sierra Blanca Ruidoso Airport (SRR) Pavement Condition and Analysis  

E-print Network

. Design Aircraft Used for Runway Pavement Design 19 .................................................Table 1. Sierra Blanca Ruidoso (SRR) Aircraft Operations (2007) 5 ..........................Table 2. Sierra Blanca Ruidoso (SRR) Predicted Aircraft Operations 2007-2027 6

Cal, Mark P.

431

Raton Municipal Airport (RTN) Pavement Condition and Analysis  

E-print Network

Aircraft Used for Runway Pavement Design 20 .............................................Table 1. Raton Municipal Airport (RTN) Aircraft Operations (2008) 5 ......................Table 2. Raton Municipal Airport (RTN) Predicted Aircraft Operations 2007-2027 6 ..................................Figure 2

Cal, Mark P.

432

Belen Alexander Municipal Airport (E80) Pavement Condition and Analysis  

E-print Network

;................................................................................................4. Recommend Pavement Design 19 .................................................Table 5. Design Aircraft Used Municipal Airport (E80) Aircraft Operations (2007-2008) 5 .....Table 2. Belen Alexander Municipal Airport (E80) Predicted Aircraft Operations 2010-25 6 ...............Figure 2. Belen Alexander Municipal

Cal, Mark P.

433

Silver City Grant County Airport (SVC) Pavement Condition and Analysis  

E-print Network

. Recommend Pavement Design 19 ......................................................Table 5. Design Aircraft. Silver City Grant County Airport (SVC) Aircraft Operations (2008-2009) 5 .........Table 2. Silver City Grant County Airport (SVC) Predicted Aircraft Operations 2007-2027 6 ............................Figure

Cal, Mark P.

434

Automated crack control analysis for concrete pavement construction  

E-print Network

The focus of this research is on the control of random cracking in concrete paving by using sawcut notch locations in the early stages of construction. This is a major concern in concrete pavement construction. This research also addresses a...

Jang, Se Hoon

2005-11-01

435

Permeable Pavement Demonstration at the Edison Environmental Center - Poster  

EPA Science Inventory

Poster for the SAB Review detailing the porous pavement parking lot project. The poster describes the design of the parking lot, the research components that were incorporated into the design, and the monitoring plan....

436

Asphalt pavement surfaces and asphalt mixtures. Transportation research record  

SciTech Connect

The papers in this volume, which deal with asphalt pavement surfaces and asphalt mixtures, should be of interest to state and local construction, design, materials, and research engineers as well as contractors and material producers. The papers in Part 1 include discussions of pavement smoothness specifications and skidding characteristics. The first four papers in Part 2 were submitted in response to a call for papers for a session at the 75th Annual Meeting of the Transportation Research Board on low-temperature properties of hot-mix asphalt. The next eight are on the influence of volumetric and strength properties on the performance of hot-mix asphalt. In the following three papers, the topics covered are the complex modulus of asphalt concrete, cold in-place asphalt recycling, and polymer modification of asphalt pavements in Ontario. The last two papers were presented in a session on relationship of materials characterization to accelerated pavement performance testing.

NONE

1996-12-31

437

User's Guide: Cold-Mix Recycling of Asphalt Concrete Pavements.  

National Technical Information Service (NTIS)

This guide provides the technical information required to implement the application of cold-mix recycling of asphalt concrete pavements. Included are details on areas on application, benefits/advantages, limitations/disadvantages, and costs associated wit...

J. E. Shoenberger

1992-01-01

438

Life cycle assessment of concrete pavements : impacts and opportunities  

E-print Network

The concrete pavement network in the United States plays a crucial role in the economy by enabling the transport of people and goods, but it also leads to resource consumption and environmental impacts. This thesis is ...

Loijos, Alex (Alexander Nikos)

2011-01-01

439

Paper Bridge  

NSDL National Science Digital Library

In this engineering activity, challenge learners to construct a paper bridge that can support 100 pennies. Learners discover how they can make a weak material like paper strong enough to support a load pennies by changing the shape of the paper (by rolling, crumpling or folding it).

Boston, Wgbh

2002-01-01

440

Bridges, 2001.  

ERIC Educational Resources Information Center

This document is comprised of the one issue in volume 6 of "Bridges," a publication produced by the California Head Start-State Collaboration Office to detail the activities of the educational partnership and to provide relevant information to programs participating in the partnership. The Summer 2001 issue focuses on providing practitioners with…

Zito, Michael, Ed.

2001-01-01

441

Rehabilitation of continuously reinforced concrete pavements using overlays  

E-print Network

REHABILITATION OF CONTINUOUSLY REINFORCED CONCRETE PAVEMENTS USING OVERLAYS A Thesis by SOUMYA SRIRAMAN Submitted to the Graduate College of Texas ARM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE... August 1993 Major Subject: Civil Engineering REHABILITATION OF CONTINUOUSLY REINFORCED CONCRETE PAVEMENTS USING OVERLAYS A Thesis by SOUMYA SRIRAMAN Submitted to Texas A&M University in partial fulfillment of the requirements for the degree...

Sriraman, Soumya

2012-06-07

442

Minimizing Distress on Flexible Pavements Using Variable Tire Pressure  

Microsoft Academic Search

The potential of variable tire pressure technology to minimize distress on flexible pavements with thin asphalt surfacing layers and peat soil subgrade was evaluated using in-situ stress-strain data. Pavement interfacial strains and corresponding subgrade stresses imposed by a three-axle truck were measured and used to estimate the fatigue life of the surfacing layer. Three levels of truck wheel loads in

Philip M. O. Owende; Anton M. Hartman; Shane M. Ward; Michael D. Gilchrist; Michael J. O'Mahony

2001-01-01

443

Mechanistic modeling of roughness on continuously reinforced concrete pavement  

E-print Network

MECHANISTIC MODELING OF ROUGHNESS ON CONTINUOUSLY REINFORCED CONCRETE PAVEMENTS A Thesis by SUPRIYA SRIRAMAN Submitted to the OAice of graduate Studies of Texas ASM University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE December 1996 Major Subject: Civil Engineering MECHANISTIC MODELING OF ROUGHNESS ON CONTINUOUSLY REINFORCED CONCRETE PAVEMENTS A Thesis by SUPRIYA SRI~ Submitted to Texas A&M University in partial fulfillment of the requirements...

Sriraman, Supriya

2012-06-07

444

Pavement rehabilitation and funds allocation for a transportation network  

E-print Network

PAVEMENT REHABILITATION AND FUNDS ALLOCATION FOR A TRANSPORTATION NETWORK A Thesis by ALVARO STEIN Submitted to the Graduate College of Texas ASM University in Partial fulfillment of the requirements for the degree of MASTER OF SCIENCE... December 1985 Major Subject: Industrial Engineering PAVEMENT REHABILITATION AND FUNDS ALLOCATION FOR A TRANSPORTATION NETWORK A Thesis by ALVARO STEIN Approved as to style and content by: Donald R. Smith (Co-Chai rman of Committee) Robe L. tton...

Stein, Alvaro

2012-06-07

445

Automatic Asphalt pavement crack detection and classification using Neural Networks  

Microsoft Academic Search

Managing of road maintenance is the most complex task for road administrations. The first presumption for the evaluation analysis and correct road construction rehabilitation is to have accurate and up-to-date information about road pavement condition. As the pavement condition survey is a critical process, it needs fast and cost-effective methods to collect necessary data. The paper proposes a system for

T. Saar; O. Talvik

2010-01-01

446

Neural networks based concrete airfield pavement layer moduli backcalculation  

Microsoft Academic Search

The Heavy Weight Deflectometer (HWD) is a Non-Destructive Test (NDT) equipment used to assess the structural condition of airfield pavement systems. This paper presents an Artificial Neural Networks (ANN) based approach for non-destructively estimating the stiffness properties of rigid airfield pavements subjected to full-scale dynamic traffic testing using simulated new generation aircraft gears. HWD tests were routinely conducted on three

Halil Ceylan; Kasthurirangan Gopalakrishnan; M. Birkan Bayrak

2008-01-01

447

Bridged graphite oxide materials  

NASA Technical Reports Server (NTRS)

Bridged graphite oxide material comprising graphite sheets bridged by at least one diamine bridging group. The bridged graphite oxide material may be incorporated in polymer composites or used in adsorption media.

Herrera-Alonso, Margarita (Inventor); McAllister, Michael J. (Inventor); Aksay, Ilhan A. (Inventor); Prud'homme, Robert K. (Inventor)

2010-01-01

448

Recycled materials in asphalt pavements. (Latest citations from the NTIS bibliographic database). Published Search  

SciTech Connect

The bibliography contains citations concerning the recycling of asphalt pavement materials, and the use of other recycled materials to manufacture asphalt pavement. Articles discuss methods used for recycling bituminous pavement including hot-mix and cold-mix. Materials used to improve recycled pavement, and recycled materials used in asphalt pavement include latexes, rubber scrap such as tires, glass shards, concretes, dusts, waste oils, roofing wastes, sulfur, and metal refining sludges. Testing and evaluation of recycled pavements both in laboratories and in test cases are considered. (Contains a minimum of 160 citations and includes a subject term index and title list.)

Not Available

1994-05-01

449

Softening agents for recycling asphalt pavement  

SciTech Connect

An asphaltic composition is described consisting essentially of: comminuted aged asphaltic pavement material; an effective amount, from about 2% to about 15 % by weight of a blend of an agent selected from the group consisting of a soft asphalt cement, a conventional asphalt cement, and a cutback asphalt, with a nitrogen-containing, adhesion-improving, anti-stripping agent comprising a sewage sludge-derived oil, or a fraction thereof, said sewage sludge-derived oil comprising a mixture of saturated aliphatic hydrocarbons, monoaromatic hydrocarbons, diaromatic hydrocarbons, polyaromatic hydrocarbons, polar compounds and basic, pyridene-soluble compounds, having the following elemental chemical composition: nitrogen, about 3.4% to about 5% by weight; oxygen, about 5.8% to about 6.9% by weight; sulfur, about 0.3% to about 0.8% by weight; hydrogen, about 9.7% to about 10.4%, and carbon, about 76.9% to about 79.8%.

Sawatzky, H.; Clelland, F.I.; Farnand, B.A.; Houde, J. Jr.

1993-08-10

450

Cloud Impacts on Pavement Temperature in Energy Balance Models  

NASA Astrophysics Data System (ADS)

Forecast systems provide decision support for end-users ranging from the solar energy industry to municipalities concerned with road safety. Pavement temperature is an important variable when considering vehicle response to various weather conditions. A complex, yet direct relationship exists between tire and pavement temperatures. Literature has shown that as tire temperature increases, friction decreases which affects vehicle performance. Many forecast systems suffer from inaccurate radiation forecasts resulting in part from the inability to model different types of clouds and their influence on radiation. This research focused on forecast improvement by determining how cloud type impacts the amount of shortwave radiation reaching the surface and subsequent pavement temperatures. The study region was the Great Plains where surface solar radiation data were obtained from the High Plains Regional Climate Center's Automated Weather Data Network stations. Road pavement temperature data were obtained from the Meteorological Assimilation Data Ingest System. Cloud properties and radiative transfer quantities were obtained from the Clouds and Earth's Radiant Energy System mission via Aqua and Terra Moderate Resolution Imaging Spectroradiometer satellite products. An additional cloud data set was incorporated from the Naval Research Laboratory Cloud Classification algorithm. Statistical analyses using a modified nearest neighbor approach were first performed relating shortwave radiation variability with road pavement temperature fluctuations. Then statistical associations were determined between the shortwave radiation and cloud property data sets. Preliminary results suggest that substantial pavement forecasting improvement is possible with the inclusion of cloud-specific information. Future model sensitivity testing seeks to quantify the magnitude of forecast improvement.

Walker, C. L.

2013-12-01

451

46 CFR 28.410 - Deck rails, lifelines, storm rails, and hand grabs.  

Code of Federal Regulations, 2010 CFR

... 2010-10-01 2010-10-01 false Deck rails, lifelines, storm rails, and hand grabs. 28.410 Section 28.410...Than 16 Individuals on Board § 28.410 Deck rails, lifelines, storm rails, and hand grabs....

2010-10-01

452

46 CFR 28.410 - Deck rails, lifelines, storm rails, and hand grabs.  

Code of Federal Regulations, 2013 CFR

... 2013-10-01 2013-10-01 false Deck rails, lifelines, storm rails, and hand grabs. 28.410 Section 28.410...Than 16 Individuals on Board § 28.410 Deck rails, lifelines, storm rails, and hand grabs....

2013-10-01

453

46 CFR 28.410 - Deck rails, lifelines, storm rails, and hand grabs.  

Code of Federal Regulations, 2012 CFR

... 2012-10-01 2012-10-01 false Deck rails, lifelines, storm rails, and hand grabs. 28.410 Section 28.410...Than 16 Individuals on Board § 28.410 Deck rails, lifelines, storm rails, and hand grabs....

2012-10-01

454

46 CFR 28.410 - Deck rails, lifelines, storm rails, and hand grabs.  

Code of Federal Regulations, 2011 CFR

... 2011-10-01 2011-10-01 false Deck rails, lifelines, storm rails, and hand grabs. 28.410 Section 28.410...Than 16 Individuals on Board § 28.410 Deck rails, lifelines, storm rails, and hand grabs....

2011-10-01

455

Evaluation and Development of Pavement Scores, Performance Models and Needs Estimates for the TXDOT Pavement Management Information System - Final Report.  

National Technical Information Service (NTIS)

This project conducted a thorough review of the existing Pavement Management Information System (PMIS) database, performance models, needs estimates, utility curves, and scores calculations, as well as a review of District practices concerning the three b...

A. Wimsatt, A. T. Papagiannakis, C. Chang-Albitres, C. Gurganus, I. Abdallah, J. Weissmann, N. Gharaibeh, S. Nazarian, S. Saliminejad, T. Freeman

2012-01-01

456

Experimental Study on Geocell-Reinforced Flexible Pavements with Recycled Asphalt Pavement (RAP) Bases under Cyclic Loading  

E-print Network

ABSTRACT The reprocessed old hot mix asphalt (HMA) concrete also called "Recycled Asphalt Pavement (RAP)", if used to build new roads or to maintain existing roads, would have several benefits, such as preservation of natural resources for future...

Acharya, Bhagaban

2011-12-31

457

Pilot Fullerton reviews checklist on Aft Flight Deck Onorbit Station  

NASA Technical Reports Server (NTRS)

Pilot Fullerton, wearing communication kit assembly (assy) mini headset, reviews checklist and looks at remote manipulator system (RMS) closed circuit television (CCTV) views displayed on CCTV monitors at Aft Flight Deck Onorbit Station. Taken from the aft flight deck starboard side, Fullerton is seen in front of Panels A7 and A8 with remote manipulator syste (RMS) translation hand control (THC) and RMS rotation hand control (RHC) in the foreground and surrounded by University of Michigan (U of M) GO BLUE and United States Air Force - A Great Way of Life Decals.

1982-01-01

458

Bridge Inspector's Training Manual.  

ERIC Educational Resources Information Center

A guide for the instruction of bridge inspectors is provided in this manual as well as instructions for conducting and reporting on a bridge inspection. The chapters outline the qualifications necessary to become a bridge inspector. The subject areas covered are: The Bridge Inspector, Bridge Structures, Bridge Inspection Reporting System,…

Federal Highway Administration (DOT), Washington, DC. Bureau of Public Roads.

459

Digital Bridges: Bridges of the Nineteenth Century  

NSDL National Science Digital Library

The collection consists of thirty representative 19th-century American bridge engineering monographs, manuals, and documents from the Lehigh University Libraries' Special Collections. The source documents have been scanned, converted to text, and partially corrected to make all significant terms and personal and proper names retrievable through the site's search engine. Topics include specific bridges (the Brooklyn Bridge, the East River Bridge), bridge types (suspension bridges, wrought iron bridges), bridge components (cabling, foundations), bridge design, bridge disasters, and others. The collection is browseable by title and searchable by keyword. Printable versions of the documents are also available. A glossary is also provided with definitions of terms, short biographies of authors, and descriptions of some of the bridges

2002-01-01

460

Applications of Ground Penetrating Radar in Bridge Health Monitoring Using Different Frequency Antennae Systems  

NASA Astrophysics Data System (ADS)

Inspection and assessment of bridge structures within the context of health monitoring of structures as well as the life cycle of structures is of paramount importance for structural engineers and bridge owners. No doubt the early detection of structural defects in particular internal structural elements such as bridge deck delamination, formation of cracks and corrosion of rebar will enable engineers to remedy the imperfection and prolong the serviceability of the structure. Applications of Ground Penetrating Radar (GPR) have proved to be effective in detecting such imperfections if utilised correctly. This paper presents and discusses the applications of GPR in assessing the structural integrity of a heavily used bridge in a town centre position (Pentagon Road Bridge, Chatham, Kent, UK) using different antennae in terms of frequency and method of application (2 GHz and 200-600 MHz GPR antennae). The paper focuses on the effectiveness of using the 'correct' tool and data processing in terms of better understanding possible structural defects. Processing, interpretation and analysis of collected data were supported by GRED software, with three-dimensional scanning capabilities. Reported results illustrate the effectiveness of GPR mapping providing valuable information regarding the positions of rebar (upper and lower reinforcement), unknown structural features as well as possible moisture ingress within the structure. The results also demonstrate a possible phenomenon in identifying the presence of moisture within the bridge deck confirming a similar finding in an earlier case (Forth Road Bridge in Scotland). Keywords: Bridge; Structure; Health Monitoring; Moisture Ingress.

Alani, A.; Kilic, G.; Aboutalebi, M.

2012-04-01

461

A Human-Interactive Course of Action Planner for Aircraft Carrier Deck Operations  

E-print Network

describes the design, implementation, and testing of a human-interactive aircraft carrier deck courseA Human-Interactive Course of Action Planner for Aircraft Carrier Deck Operations Bernard Michini USA Aircraft carrier deck operations present a complex and uncertain environment in which time

How, Jonathan P.

462

46 CFR 171.150 - Drainage of a vessel with a well deck.  

Code of Federal Regulations, 2013 CFR

... 2013-10-01 2013-10-01 false Drainage of a vessel with a well deck. 171.150...PERTAINING TO VESSELS CARRYING PASSENGERS Drainage of Weather Decks § 171.150 Drainage of a vessel with a well deck. (a)...

2013-10-01

463

46 CFR 171.150 - Drainage of a vessel with a well deck.  

Code of Federal Regulations, 2011 CFR

... 2011-10-01 2011-10-01 false Drainage of a vessel with a well deck. 171.150...PERTAINING TO VESSELS CARRYING PASSENGERS Drainage of Weather Decks § 171.150 Drainage of a vessel with a well deck. (a)...

2011-10-01

464

46 CFR 171.150 - Drainage of a vessel with a well deck.  

Code of Federal Regulations, 2010 CFR

... 2010-10-01 2010-10-01 false Drainage of a vessel with a well deck. 171.150...PERTAINING TO VESSELS CARRYING PASSENGERS Drainage of Weather Decks § 171.150 Drainage of a vessel with a well deck. (a)...

2010-10-01

465

46 CFR 171.150 - Drainage of a vessel with a well deck.  

Code of Federal Regulations, 2012 CFR

... 2012-10-01 2012-10-01 false Drainage of a vessel with a well deck. 171.150...PERTAINING TO VESSELS CARRYING PASSENGERS Drainage of Weather Decks § 171.150 Drainage of a vessel with a well deck. (a)...

2012-10-01

466

46 CFR 32.56-30 - Category A machinery spaces: Bulkheads and decks-T/ALL.  

Code of Federal Regulations, 2010 CFR

... false Category A machinery spaces: Bulkheads and decks-T/ALL. 32.56-30 Section 32.56-30 Shipping COAST...56-30 Category A machinery spaces: Bulkheads and decks—T/ALL. (a) Bulkheads and decks that separate category A...

2010-10-01

467

46 CFR 32.56-30 - Category A machinery spaces: Bulkheads and decks-T/ALL.  

Code of Federal Regulations, 2011 CFR

... false Category A machinery spaces: Bulkheads and decks-T/ALL. 32.56-30 Section 32.56-30 Shipping COAST...56-30 Category A machinery spaces: Bulkheads and decks—T/ALL. (a) Bulkheads and decks that separate category A...

2011-10-01

468

46 CFR 32.56-30 - Category A machinery spaces: Bulkheads and decks-T/ALL.  

Code of Federal Regulations, 2013 CFR

... false Category A machinery spaces: Bulkheads and decks-T/ALL. 32.56-30 Section 32.56-30 Shipping COAST...56-30 Category A machinery spaces: Bulkheads and decks—T/ALL. (a) Bulkheads and decks that separate category A...

2013-10-01

469

46 CFR 32.56-30 - Category A machinery spaces: Bulkheads and decks-T/ALL.  

Code of Federal Regulations, 2012 CFR

... false Category A machinery spaces: Bulkheads and decks-T/ALL. 32.56-30 Section 32.56-30 Shipping COAST...56-30 Category A machinery spaces: Bulkheads and decks—T/ALL. (a) Bulkheads and decks that separate category A...

2012-10-01

470

46 CFR 166.05 - Course of study for deck students.  

Code of Federal Regulations, 2013 CFR

... 2013-10-01 false Course of study for deck students...SCHOOL SHIPS § 166.05 Course of study for deck students. The course of study for deck students...incident to the sailing and management of a vessel insofar as...

2013-10-01

471

46 CFR 166.05 - Course of study for deck students.  

Code of Federal Regulations, 2010 CFR

... 2010-10-01 false Course of study for deck students...SCHOOL SHIPS § 166.05 Course of study for deck students. The course of study for deck students...incident to the sailing and management of a vessel insofar as...

2010-10-01

472

46 CFR 166.05 - Course of study for deck students.  

Code of Federal Regulations, 2012 CFR

... 2012-10-01 false Course of study for deck students...SCHOOL SHIPS § 166.05 Course of study for deck students. The course of study for deck students...incident to the sailing and management of a vessel insofar as...

2012-10-01

473

46 CFR 166.05 - Course of study for deck students.  

Code of Federal Regulations, 2011 CFR

... 2011-10-01 false Course of study for deck students...SCHOOL SHIPS § 166.05 Course of study for deck students. The course of study for deck students...incident to the sailing and management of a vessel insofar as...

2011-10-01

474

Building Bridges  

NSDL National Science Digital Library

In this lesson, students build bridges from arithmetical to algebraic thinking by exploring problems that are not limited to single-solution responses. Values organized into tables and graphs are used to move toward symbolic representations. Problem situations at the middle school level involve linear, quadratic, and exponential models. The site is valuable not only for its problems for students but also for the teaching strategy illustrated here.

Day, Roger; Illustrations, Nctm

2000-01-01

475

Bridge Building  

NSDL National Science Digital Library

This is a quick activity (on page 2 of the PDF) about how the arrangement of carbon atoms determines carbon's different properties. Learners will build bridges with Post-It notes that model two types of carbon molecules, graphite and carbon nanotubes, and test which structure of the same material can bear the weight of the most pennies. Also relates to linked video, DragonflyTV Nano: Hockey Sticks.

Twin Cities Public Television, Inc.

2008-01-01

476

Special Fluid Viscous Dampers For The Messina Strait Bridge  

SciTech Connect

The Messina Strait Bridge would be the world's longest suspension bridge, with a design earthquake characterised by a PGA value of 0.58 g and a distance between the ipocenter and the bridge of 15 km. Said critical structure of course would need a suitable restraint system for traffic braking loads, wind and seismic actions. Each type of load requires a specific behaviour of the restraint system, making its design a big challenge.The restraint system comprises special types of fluid viscous dampers, installed both in longitudinal and transverse direction, both at the towers and at the anchorages. In seismic conditions they behave as viscous dampers, to reduce the forces on the structural elements and the movements of the bridge deck. But in service dynamic conditions, e.g. under traffic or wind load, the devices shall behave like shock transmission units, thus preventing the longitudinal and transverse movements of the deck.FIP Industriale cooperated with the selected General Contractor, a consortium lead by Impregilo, in the design of said viscous dampers. This paper describes the main features of said devices.

Colato, Gian Paolo; Infanti, Samuele; Castellano, Maria Gabriella [FIP Industriale spa, Via Scapacchio 41, 35030 Selvazzano Dentro (Italy)

2008-07-08

477

Over the Edge and Back: What to Do If You Drive Off the Pavement Edge  

MedlinePLUS

AAA Foundation for Traffic Safety Over the Edge and Back What to do if you drive off ... fatal relative to other crashes on similar roads. AAA Foundationfor Traffic Safety Pavement edge drop-off “ Pavement ...

478

An investigation of factors that significantly affect pavement maintenance costs in Texas  

E-print Network

including average daily traffic, equivalent single axle loads, distress score, ride score, annual rainfall, annual freeze/thaw cycles, functional classification, as well as the district that maintains the pavement. For each pavement type and highway...

Fogle, Kendall Lee

2012-06-07

479

POROUS PAVEMENT PHASE I DESIGN AND OPERATIONAL CRITERIA (EPA/600/2-80/135)  

EPA Science Inventory

Design and operational criteria, utilization concepts, benefits and disadvantages, as well as other characteristics of porous pavements are presented in this report. Particular emphasis is placed on porous asphalt pavements, but the criteria and design approach are applicable to ...

480

State DOT Representative Report Questions National Concrete Consortium  

E-print Network

, and the adjacent 50 feet of approach pavement. 5. What corrective actions are required for substandard bridge deck requirements. 7. Does your state consider ride quality as a scoping item for bridge rehabilitation? Yes, ride quality is a determining factor in scoping bridge rehabilitation projects. We would normally NOT initiate

481

Closeup view of the aft flight deck of the Orbiter ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Close-up view of the aft flight deck of the Orbiter Discovery looking at the aft center control panels A6, A7, A8, A12, A13, A14, A16 and A17. This View was taken at Kennedy Space Center. - Space Transportation System, Orbiter Discovery (OV-103), Lyndon B. Johnson Space Center, 2101 NASA Parkway, Houston, Harris County, TX

482

Closeup view of the mid deck aft wall of the ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Close-up view of the mid deck aft wall of the Orbiter Discovery showing a mission specific configuration of stowage lockers within the modular system designed for maximum flexibility. This photograph was taken at Kennedy Space Center. - Space Transportation System, Orbiter Discovery (OV-103), Lyndon B. Johnson Space Center, 2101 NASA Parkway, Houston, Harris County, TX

483

General view of the flight deck of the orbiter Discovery ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

General view of the flight deck of the orbiter Discovery looking forward and overhead at the overhead instrumentation and control panels. This view was taken at Kennedy Space Center. - Space Transportation System, Orbiter Discovery (OV-103), Lyndon B. Johnson Space Center, 2101 NASA Parkway, Houston, Harris County, TX

484

19. TRAVELING CRANE ATOP SUPERSTRUCTURE, FROM RUN LINE DECK. Looking ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

19. TRAVELING CRANE ATOP SUPERSTRUCTURE, FROM RUN LINE DECK. Looking up to north northeast. - Edwards Air Force Base, Air Force Rocket Propulsion Laboratory, Test Stand 1-A, Test Area 1-120, north end of Jupiter Boulevard, Boron, Kern County, CA

485

STS-30 Commander Walker on forward flight deck  

NASA Technical Reports Server (NTRS)

On Atlantis', Orbiter Vehicle (OV) 104's, forward flight deck between commanders and pilots seats, STS-30 Commander David M. Walker smiles while having his picture taken. Walker, wearing a mission polo shirt and light blue flight coverall pants, holds onto the commanders seat back. Forward flight control panels are visible above Walker's head and behind him.

1989-01-01

486

14. OBLIQUE VIEW OF UPPER ORE BIN AND LOADING DECK, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

14. OBLIQUE VIEW OF UPPER ORE BIN AND LOADING DECK, LOOKING WEST. DETAIL OF SUPPORTING TIMBERS. THE LOCATION OF THIS ORE BIN IN RELATION TO THE MILL CAN BE SEEN IN MANY OF THE MILL OVERVIEWS. (CA-290-4 THROUGH CA-290-8). - Skidoo Mine, Park Route 38 (Skidoo Road), Death Valley Junction, Inyo County, CA

487

22. STEAM PLANT TURBINE DECK FROM SOUTH END OF BUILDING, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

22. STEAM PLANT TURBINE DECK FROM SOUTH END OF BUILDING, SHOWING TOPS OF DIESEL ENGINES AT FAR NORTH END, PRIOR TO INSTALLATION OF STEAM UNIT NO. 4. Ca. 1948 - Crosscut Steam Plant, North side Salt River near Mill Avenue & Washington Street, Tempe, Maricopa County, AZ

488

11. MAIN DECK, VIEW FORWARD FROM MIDSHIP, LOOKING AT MIDSHIP ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

11. MAIN DECK, VIEW FORWARD FROM MIDSHIP, LOOKING AT MIDSHIP CABINS, GALLEY AND STEAM-POWERED WINCH EQUIPMENT. TWO PORT OIL TANK HATCHES CAN BE SEEN AT LEFT AND ONE STARBOARD OIL TANK AT RIGHT - Ship "Falls of Clyde", Hawaii Maritime Center,Pier 7, Honolulu, Honolulu County, HI

489

5. View to east of west elevation. Second story deck ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

5. View to east of west elevation. Second story deck at right opens off 'Fireside' guest room; Helmuth Deetjen hand-carved the balusters. Scale just visible against first story wall at lower right. - Deetjen's Big Sur Inn, Hayloft Building, East Side of State Highway 1, Big Sur, Monterey County, CA

490

View of the yacht club facing east. The new deck ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View of the yacht club facing east. The new deck and the avila pier are on the right and the harbor storage and restrooms are on the left. - San Luis Yacht Club, Avila Pier, South of Front Street, Avila Beach, San Luis Obispo County, CA

491

Thermal performance of insulated metal building roof deck constructions  

Microsoft Academic Search

System thermal resistance (R) values were measured in full-scale guarded hot box tests, in accordance with ASTM Test for Thermal Conductance and Transmittance of Built-Up Sections by Means of the Guarded Hot Box (C 236), on a series of ten insulated metal building roof deck constructions. Orientation of the hot box was horizontal, with heat flow upward for the test

R. G. Miller; M. Sherman

1983-01-01

492

RETENTION BASIN. ERECTING REINFORCING STEEL FOR CONCRETE DECK. STACK RISES ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

RETENTION BASIN. ERECTING REINFORCING STEEL FOR CONCRETE DECK. STACK RISES AT TOP LEFT. CAMERA FACES WEST. INL NEGATIVE NO. 2581. Unknown Photographer, 6/18/1951 - Idaho National Engineering Laboratory, Test Reactor Area, Materials & Engineering Test Reactors, Scoville, Butte County, ID

493

19. On salon deck level, view looking forward at tops ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

19. On salon deck level, view looking forward at tops of steam chimneys (rising from boilers) showing safety valves, safety valve vent pipe, and smoke bonnet underneath smokestack. Steam chimneys are integral parts of the boilers and in effect are smokestacks surrounded by a pressurized steam space continuous with the boiler steam spaces. - Ferry TICONDEROGA, Route 7, Shelburne, Chittenden County, VT

494

Determining the sidewalk pavement width by using pedestrian discomfort levels and movement characteristics  

Microsoft Academic Search

This paper presents a sidewalk pavement width design method for making more pedestrian friendly and walk-inspiring sidewalk\\u000a pavements in the urban area. Instead of using the current sidewalk pavement width design standard that usually leads to having\\u000a minimum values, this research investigated pedestrians’ preferences on the levels of service, surveyed actual foot path trajectories\\u000a in the sidewalk pavements, and observed

Sangyoup Kim; Jaisung Choi; Yongseok Kim

2011-01-01

495

Offshore deck to substructure mating system and method  

SciTech Connect

An offshore platform, in combination, a deck for installation to be supported by a substructure is described including a plurality of upstanding column members, said deck including a corresponding plurality of depending legs, the improvement characterized by: at least one of said legs including a stabbing tip assembly for engagement with a corresponding column member, said stabbing tip assembly comprising an outer body for engagement with said column member to transfer permanent weight of said deck to said column member, a generally vertically movable locating pin disposed in said body for movement to stab into receiver means including means forming a receptacle on said column member for locating said dock with respect to said column member, and resilient means supported by said body for accommodating lateral and vertically-imposed loads acting between said column member and said leg during placement of said deck on said substructure to minimize the imposition of peak forces on said deck and said substructure; said receiver means comprising a generally cylindrical receiver shoe forming said receptacle, said shoe comprising part of a jack assembly supported on said column member and said shoe being operable to be moved to a position to permit contact of said leg with said column member to provide supporting relationship therebetween; and said jack assembly comprising a generally cylindrical body member supported on said column member and forming a chamber with said shoe for receiving particulate material to support said shoe in a first position for receiving said locating pin, said shoe being movable to a second position in response to removing said particulate material from said chamber to permit movement of said leg into engagement with said body member.

Datta, B.N.; Baldwin, R.L.; Allen, J.D.

1993-06-15

496

of Transportation Rigid Pavement Design and Analysis Web-Based Training Site  

E-print Network

Texas Department of Transportation Rigid Pavement Design and Analysis Web-Based Training Site Highway Administration Texas Department of Transportation, 2004 Rigid Pavement Design and Analysis Web for six computer programs pertaining mainly to the design and analysis of rigid pavements. The programs

Texas at Austin, University of

497

Development of ground-penetrating radar equipment for detecting pavement condition for preventive maintenance  

NASA Astrophysics Data System (ADS)

The report documents the development of a ground penetrating radar (GPR) system for locating potential maintenance problems in highway pavements. The report illustrates how GPR has the potential to detect four defects in pavements: stripping in an asphalt layer; moisture in base layer; voids or loss of support under rigid pavements; and overlay delamination.

Smith, S. S.; Scuillion, T.

1993-10-01

498

A Study of the Performance of Three Asphalt Pavement Rehabilitation Strategies  

Microsoft Academic Search

This study analyzes the performance of three common hot mix asphalt rehabilitation strategies on 149 pavements over a period of seven years. All three strategies place two-inch overlays on the pavement to be rehabilitated. The first strategy includes an overlay on the existing pavement after sweeping the surface and applying a tack coat. The second strategy places the overlay after

Christopher Schmidt

499

AUTOMATIC DETECTION AND CLASSIFICATION OF DEFECT ON ROAD PAVEMENT USING ANISOTROPY MEASURE  

E-print Network

AUTOMATIC DETECTION AND CLASSIFICATION OF DEFECT ON ROAD PAVEMENT USING ANISOTROPY MEASURE Tien Sy-sy.nguyen@etu.univ-orleans.fr ABSTRACT Existing systems for automated pavement defect detection can only identify cracking type defects for the inspectors and road users [1]. In the last few years, several automated pavement inspecting systems which use

Paris-Sud XI, Université de

500

Pavement Boundary Detection Via Circular Shape Models Bing Ma \\Lambda Sridhar Lakshmanan Alfred O. Hero  

E-print Network

Pavement Boundary Detection Via Circular Shape Models Bing Ma \\Lambda Sridhar Lakshmanan Alfred O bingm@umich.edu lakshman@umich.edu hero@eecs.umich.edu Abstract Automated detection of pavement of art systems for detecting and tracking pavement boundaries use a priori shape models to describe

Hero, Alfred O.