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Investigation Into Alternative Devices For Joint Load Transfer In Jointed Concrete Pavement
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Book Synopsis Investigation Into Alternative Devices for Joint Load Transfer in Jointed Concrete Pavement by : James Clifford Mann
Download or read book Investigation Into Alternative Devices for Joint Load Transfer in Jointed Concrete Pavement written by James Clifford Mann and published by . This book was released on 2013 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conventional construction of Jointed Plain Concrete Pavements (JPCP) in Canada consists of placing a round steel epoxy-coated dowel at the mid height of the pavement. Steel dowels reduce stepping at the joint to improve comfort and reduce the stress concentration on the support layer beneath the pavement. Most importantly they transfer load and are commonly referred to as load transfer devices. Problems with dowel bar deterioration, including corrosion causes the slab joint to lock and cause stress concentrations as the slab expands and or contracts and curls due to thermal and shrinkage straining occurring in the concrete. In this research, alternative joint load transfer devices are presented and compared to conventional steel dowels. Four device alternatives are developed and evaluated: a Glass Fibre Reinforced Polymer (GFRP) I-beam placed directly on the base material; GFRP tapered plates; a continuous horizontal V device; and a continuous horizontal pipe device both placed directly on the support layer. The two devices that are continuous run the length of the joint similar to a shear key. The GFRP tapered plate and I-beam, as well as conventional steel dowels, were analyzed in a wheel path sized three dimensional finite element model for wheel loading and static loading applied to either side of the joint. An experimental testing program was developed to test joint load transfer capabilities of each device when subjected to a static wheel load applied to either side of the joint. The GFRP tapered plates and I-beams were shown to transfer load based on the results from the wheel path finite element model and experimental testing program. The differential joint deflection, stress concentrations and plastic straining occurring in the concrete is not reduced with either the tapered plate or I-beam compared to a dowel under wheel loading. In addition, a similar plastic straining area identified in the finite element models were noticed as an area of damage in the experimental testing program. All of the devices developed are analyzed in a quarter slab three dimensional finite element model with shrinkage and thermal strains as well as wheel loading applied to the slab to simulate service loading. A detailed investigation into the stress distribution around the devices and the differential deflection at the joint through the service loading applied is presented in this paper. Similarly to the wheel path investigation the stress concentration in the tapered plate and I-beams are greater than conventional dowels and also have greater differential deflection occurring at the joint. Both the continuous Horizontal V and Horizontal Pipe device reduce stress and plastic straining in the concrete during the service load analysis compared to dowels. During daytime wheel loading the differential deflection in the joint is the lowest with no noticeable stepping occurring at the joint with the Horizontal V device; however is greater than conventional steel dowels under nighttime wheel load application. The differential deflection with the Horizontal Pipe during day and night straining and wheel loading is similar to conventional steel dowels.
Book Synopsis Investigation in Alternative Devices for Joint Load Transfer in Jointed Concrete Pavement by : James Clifford Mann
Download or read book Investigation in Alternative Devices for Joint Load Transfer in Jointed Concrete Pavement written by James Clifford Mann and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Demonstration and Field Evaluation of Alternative Portland Cement Concrete Pavement Reinforcement Materials by :
Download or read book Demonstration and Field Evaluation of Alternative Portland Cement Concrete Pavement Reinforcement Materials written by and published by . This book was released on 2003 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transverse joints are placed in portland cement concrete pavements to control the development of random cracking due to stresses induced by moisture and thermal gradients and restrained slab movement. These joints are strengthened through the use of load transfer devices, typically dowel bars, designed to transfer load across the joint from one pavement slab to the next. Epoxy coated steel bars are the materials of choice at the present time, but have experienced some difficulties with resistance to corrosion from deicing salts. The research project investigated the use of alternative materials, dowel size and spacing to determine the benefits and limitations of each material. In this project two types of fiber composite materials, stainless steel solid dowels and epoxy coated dowels were tested for five years in side by side installation in a portion of U.S. 65 near Des Moines, Iowa, between 1997 and 2002. The work was directed at analyzing the load transfer characteristics of 8-in. vs. 12-in. spacing of the dowels and the alternative dowel materials, fiber composite (1.5- and 1.88-in. diameter) and stainless steel (1.5-in. diameter), compared to typical 1.5-in. diameter epoxy-coated steel dowels placed on 12-in. spacing. Data were collected biannually within each series of joints and variables in terms of load transfer in each lane (outer wheel path), visual distress, joint openings, and faulting in each wheel path. After five years of performance the following observations were made from the data collected. Each of the dowel materials is performing equally in terms of load transfer, joint movement and faulting. Stainless steel dowels are providing load transfer performance equal to or greater than epoxy-coated steel dowels at the end of five years. Fiber reinforced polymer (FRP) dowels of the sizes and materials tested should be spaced no greater than 8 in. apart to achieve comparable performance to epoxy coated dowels. No evidence of deterioration due to road salts was identified on any of the products tested. The relatively high cost of stainless steel solid and FRP dowels was a limitation at the time of this study conclusion. Work is continuing with the subject materials in laboratory studies to determine the proper shape, spacing, chemical composition and testing specification to make the FRP and stainless (clad or solid) dowels a viable alternative joint load transfer material for long lasting portland cement concrete pavements.
Book Synopsis Concrete Pavement Rehabilitation by :
Download or read book Concrete Pavement Rehabilitation written by and published by . This book was released on 1997 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Load transfer restoration (LTR) is a rehabilitation technique for increasing the load transfer capability of existing jointed portland cement concrete pavement by placement of dowel bars or other mechanical devices across joints and/or cracks that exhibit poor load transfer.
Book Synopsis Field Evaluation of Alternative Load Transfer Device Locations in Low-traffic Volume Pavements by : James K. Cable
Download or read book Field Evaluation of Alternative Load Transfer Device Locations in Low-traffic Volume Pavements written by James K. Cable and published by . This book was released on 2003 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research was to evaluate the impact of the number of dowel bars and dowel location on joint performance and ultimately on pavement performance. For this research, test sections were designed, constructed, and tested in actual field service pavement. Test sections were developed to include areas with load transfer assemblies having three and four dowels in the outer wheel path only, areas with no joint reinforcement whatsoever, and full lane dowel basket assemblies as the control. Two adjacent paving projects provided both rural and urban settings and differing base materials. This report documents the approach to implementing the study and provides discussion and suggestions based on the results of the research.
Book Synopsis FHWA Nationally Coordinated Program of Highway Research, Development, and Technology. Annual Progress Report. Fiscal Year 1993 by :
Download or read book FHWA Nationally Coordinated Program of Highway Research, Development, and Technology. Annual Progress Report. Fiscal Year 1993 written by and published by . This book was released on 1993 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Fiber Composite and Stainless Steel as Alternative Dowel Bar Material by : Jeffrey G. Hoffman
Download or read book Evaluation of Fiber Composite and Stainless Steel as Alternative Dowel Bar Material written by Jeffrey G. Hoffman and published by . This book was released on 2002 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dowel bars are used to transfer loads between adjacent pavement sections within a jointed concrete pavement. Epoxy coated steel is the most common material used for dowel bars, but steel dowel bars have been found to be susceptible to corrosion. The objectives of this research is to investigate fiber reinforced plastic (FRP) and stainless steel as alternative dowel bar materials, and to study the effects of FRP and stainless steel dowels size and spacing on load transfer behavior of concrete pavements. The load transfer behavior of the pavement was evaluated biannually by utilizing a falling weight deflectometer (FWD), measuring joint faulting and joint opening, and conducting a visual distress survey. The analyses indicate the epoxy coated steel outperformed the alternative materials. The average research lifetime load transfer for the epoxy coated steel is 91 percent, while the best performance of the alternative material at the same 12 inch on center spacing is approximately 87 percent for the stainless steel. The data also indicate the decrease in spacing, from 12 to 8 inches, increases the load transfer for stainless steel and 1.5 inch diameter FRP dowels. Although the FRP dowels with decreased spacing were outperformed by the epoxy coated steel dowels, they performed adequately. It is recommended that the current dowel bar standard continue to be implemented for concrete pavements requiring dowels as load transfer devices. However, if the pavement is to be constructed in a corrosive environment or a longer design life is desired, stainless steel spaced at 12 inches and 1.5 inch diameter FRP dowels spaced at 8 inches should be considered.
Book Synopsis High performance concrete pavements by :
Download or read book High performance concrete pavements written by and published by . This book was released on 2002 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Public Roads written by and published by . This book was released on 2001 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cost Effective Concrete Pavement Cross-sections by : James A. Crovetti
Download or read book Cost Effective Concrete Pavement Cross-sections written by James A. Crovetti and published by . This book was released on 2006 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transportation Research Record written by and published by . This book was released on 1998 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book World War II Posters written by and published by . This book was released on 1939 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Non-corrosive Tie Reinforcing and Dowel Bars for Highway Slabs by : Max L. Porter
Download or read book Non-corrosive Tie Reinforcing and Dowel Bars for Highway Slabs written by Max L. Porter and published by . This book was released on 1993 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wisconsin Transportation Research by :
Download or read book Wisconsin Transportation Research written by and published by . This book was released on 2000 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Federally Coordinated Program of Highway Research, Development, and Technology. Annual Progress Report. Fiscal Year 1985 by :
Download or read book Federally Coordinated Program of Highway Research, Development, and Technology. Annual Progress Report. Fiscal Year 1985 written by and published by . This book was released on 1986 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wisconsin Transportation Research, 2000 by : Wisconsin. Department of Transportation
Download or read book Wisconsin Transportation Research, 2000 written by Wisconsin. Department of Transportation and published by . This book was released on 2001 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Report to Stakeholders reviews some of our transportation research efforts in Wisconsin during the past four years. A few of these studies are already complete and have made a significant impact on the way we do business. Many of the projects will be finished in the coming months. For all of us interested in Wisconsin's transportation future, the report provides an overview of these diverse and laudable investigations.
Book Synopsis Analysis, Design, and Construction of Transverse Joint Load Transfer Systems for Rigid Pavements by : Raymond K. Moore
Download or read book Analysis, Design, and Construction of Transverse Joint Load Transfer Systems for Rigid Pavements written by Raymond K. Moore and published by . This book was released on 1994 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report discusses the evolutionary developments in mechanistic dowel behaviour theory proposed by Bradbury, Grinter, Friberg, Lessels, Timoshenko, and Westergaard. New findings relating to dowel bar behaviour obtained from finite-element modelling are discussed. A sampling of pavement performance model which use empirical or empirical-mechanistic statistical regressions to estimate load transfer performance (expressed as transverse joint faulting) in terms of material, environmental and traffic variables not considered by theoretical analysis is presented. The findings from a limited number of field performance and laboratory studies are summarised.
