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Shear Strength And Shear Fatigue Behavior Of Full Scale Prestressed Concrete Box Girders
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Book Synopsis Shear Strength and Shear Fatigue Behavior of Full-scale Prestressed Concrete Box Girders by : Anita K. Buzick
Download or read book Shear Strength and Shear Fatigue Behavior of Full-scale Prestressed Concrete Box Girders written by Anita K. Buzick and published by . This book was released on 1999 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two full-scale prestressed concrete box girders with identical properties were tested. The loads were placed so that shear rather than flexure would govern failure. The first girder was tested to evaluate ultimate shear strength under monotonic loading. The second girder was subjected to one-half million cycles of repeated loading and nine static overloads before its ultimate strength test. The results indicated that the effect of repeated loading on the shear strength of a shear dominated girder is less significant than that of a flexure dominated girder.
Book Synopsis An Exploratory Investigation of Shear Fatigue Behavior of Prestressed Concrete Girders by : Patrick Melvin Bachman
Download or read book An Exploratory Investigation of Shear Fatigue Behavior of Prestressed Concrete Girders written by Patrick Melvin Bachman and published by . This book was released on 1987 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Bureau of Public Roads. Office of Research and Development Publisher : ISBN 13 : Total Pages :178 pages Book Rating :4.:/5 (3 download)
Book Synopsis Highway Research & Development Studies by : United States. Bureau of Public Roads. Office of Research and Development
Download or read book Highway Research & Development Studies written by United States. Bureau of Public Roads. Office of Research and Development and published by . This book was released on 1968 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An exploratory investigation of shear fatigue behavior of pretensioned concrete girders by : Patrick Melvin Bachman
Download or read book An exploratory investigation of shear fatigue behavior of pretensioned concrete girders written by Patrick Melvin Bachman and published by . This book was released on 1985 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Highway Research and Development Studies Using Federal-aid Research and Planning Funds by :
Download or read book Highway Research and Development Studies Using Federal-aid Research and Planning Funds written by and published by . This book was released on 1964 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of the Shear Behavior of Prestressed Concrete Spliced Girders by : Dhiaa Mustafa T. Al-Tarafany
Download or read book Analysis of the Shear Behavior of Prestressed Concrete Spliced Girders written by Dhiaa Mustafa T. Al-Tarafany and published by . This book was released on 2016 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: Implementation of the spliced girder technology in bridges has been growing in recent years. Increased girder lengths can now be realized by splicing shorter precast segments to produce a long span. The research conducted in this dissertation is focused on an evaluation of spliced girders using a three dimensional finite element analysis. The project consisted of a series of tests that were conducted in two phases. In Phase I, the effect of post-tensioning ducts on the shear behavior and strength of prestressed concrete girders was evaluated. In Phase II, the focus was on the behavior of cast-in-place splice regions between precast segments. Since a limited number of full scale beams could be tested, a three-dimensional advanced finite element program is an effective alternative to expensive tests. The parameters considered were grout to girder concrete strength ratio, splice to girder concrete strength ratio, concrete shear key detailing, coupler diameter, duct to web width ratio, shear span to depth ratio, and concrete shrinkage losses. The findings are described in detail. Using the experimental and analytical results, it was found that the grout to concrete strength ratio for grouted ducts should not to be less than 0.3. The effect of increasing the duct diameter to web width ratio from 0.43 to 0.57 was minimal. Splice to girder concrete strength ratio should be greater than 0.6. The addition of a shear key had no effect on the shear capacity of the girder. The coupler diameter in the splice region had no effect on the behavior of the spliced girder for coupler diameter to web width ratio up to 0.55. Including concrete shrinkage in the analysis slightly improved the correlation with observed response.
Book Synopsis Design of FRP Systems for Strengthening Concrete Girders in Shear by : Abdeldjelil Belarbi
Download or read book Design of FRP Systems for Strengthening Concrete Girders in Shear written by Abdeldjelil Belarbi and published by Transportation Research Board. This book was released on 2011 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Report 678: Design of FRP Systems for Strengthening Concrete Girders in Shear offers suggested design guidelines for concrete girders strengthened in shear using externally bonded Fiber-Reinforced Polymer (FRP) systems. The guidelines address the strengthening schemes and application of the FRP systems and their contribution to shear capacity of reinforced and prestressed concrete girders. The guidelines are supplemented by design examples to illustrate their use for concrete beams strengthened with different FRP systems. Appendix A of NCHRP Report 678, which contains the research agency's final report, provides further elaboration on the work performed in this project. Appendix A: Research Description and Findings, is only available online.
Book Synopsis Shear Behavior and Capacity of Large Scale Prestressed High Strength Concrete Bulb-tee Girders by : Shaoyun Sun
Download or read book Shear Behavior and Capacity of Large Scale Prestressed High Strength Concrete Bulb-tee Girders written by Shaoyun Sun and published by ProQuest. This book was released on 2007 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the measured test results, an analytical model, Crack Displacement Field Theory (CDFT), was developed for predicting the shear response of prestressed/reinforced concrete members. Compared to other existing models, it could capture the discrete displacement due to crack opening and crack slip along crack surface and can take account the variation of stresses in reinforcement due to bond. Good agreements were achieved between the model predictions and test results.
Book Synopsis Life-Cycle Civil Engineering: Innovation, Theory and Practice by : Airong Chen
Download or read book Life-Cycle Civil Engineering: Innovation, Theory and Practice written by Airong Chen and published by CRC Press. This book was released on 2021-02-26 with total page 1758 pages. Available in PDF, EPUB and Kindle. Book excerpt: Life-Cycle Civil Engineering: Innovation, Theory and Practice contains the lectures and papers presented at IALCCE2020, the Seventh International Symposium on Life-Cycle Civil Engineering, held in Shanghai, China, October 27-30, 2020. It consists of a book of extended abstracts and a multimedia device containing the full papers of 230 contributions, including the Fazlur R. Khan lecture, eight keynote lectures, and 221 technical papers from all over the world. All major aspects of life-cycle engineering are addressed, with special emphasis on life-cycle design, assessment, maintenance and management of structures and infrastructure systems under various deterioration mechanisms due to various environmental hazards. It is expected that the proceedings of IALCCE2020 will serve as a valuable reference to anyone interested in life-cycle of civil infrastructure systems, including students, researchers, engineers and practitioners from all areas of engineering and industry.
Book Synopsis Next Generation of Bridge Columns for Accelerated Bridge Construction in High Seismic Zones by : Mostafa Tazarv
Download or read book Next Generation of Bridge Columns for Accelerated Bridge Construction in High Seismic Zones written by Mostafa Tazarv and published by . This book was released on 2014 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: Longitudinal bar debonding allowed spread of yielding and prevented premature failure of reinforcements in UHPC-filled duct connections and grouted coupler column pedestal. The SMA-reinforced ECC column showed superior seismic performance compared to a conventional column in which the plastic hinge damage was limited to only ECC cover spalling even under 12% drift ratio cycles. The column residual displacements were 79% lower than CIP residual displacements on average due to the superelastic NiTi SMA longitudinal reinforcement, and higher base shear capacity and higher displacement capacity were observed. The analytical modeling methods were simple and sufficiently accurate for general design and analyses of precast components proposed in the present study. The proposed symmetrical material model for reinforcing NiTi superelastic SMA was found to be a viable alternative to the more complex asymmetrical model.
Book Synopsis Fatigue and Shear Behavior of High Performance Concrete Bulb-tee Girders by : Robert N. Bruce
Download or read book Fatigue and Shear Behavior of High Performance Concrete Bulb-tee Girders written by Robert N. Bruce and published by . This book was released on 2003 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three 96-ft (29.3-m) long, 72-in. (1.83-m) deep, precast, pretensioned bulb-tee girders were tested to evaluate behavior under flexural fatigue and static shear loadings. The three girders had a design concrete compressive strength of 10,000 psi (69.0 MPa) and incorporated 0.6-in. (15.2-mm) diameter, Grade 270, low relaxation prestressing strands. The shear reinforcement quantities at the ends of each girder were selected to evaluate the applicability of the shear strength design provisions of the AASHTO Standard Specifications for Highway Bridges and the AASHTO LRFD Bridge Design Specifications. Shear reinforcement consisted of conventional bars or deformed welded wire reinforcement. The three prestressed concrete girders were produced in a commercial plant. Prior to testing, a 10-ft (3.05-m) wide reinforced concrete deck slab was added to each girder. After completion of fatigue testing, each girder was cut in half and the six girder ends tested to evaluate static shear strength.
Book Synopsis Seismic Performance and Retrofitting of Reinforced Concrete Bridge Bents by :
Download or read book Seismic Performance and Retrofitting of Reinforced Concrete Bridge Bents written by and published by . This book was released on 2002 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary available via the World Wide Web as of 8/29/2002 from the Bridge Research and Information Center web site,
Book Synopsis Ultimate Shear Capacity and Residual Prestress Force of Full-scale, Forty-one-year-old Prestressed-concrete Girders by : Parry Osborn
Download or read book Ultimate Shear Capacity and Residual Prestress Force of Full-scale, Forty-one-year-old Prestressed-concrete Girders written by Parry Osborn and published by . This book was released on 2010 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ultimate shear capacity of prestressed concrete beams is difficult to predict accurately, especially after being in service for an extended period of time. The Utah Department of Transportation asked researchers at Utah State University to experimentally determine the existing shear capacity of 41-year-old prestressed, decommissioned concrete bridge girders and then provide recommendations on how to increase that ultimate shear capacity. This thesis presents the research findings that relate to the existing shear capacity of the prestressed concrete girders. Eight AASHTO Type II bridge girders were tested up to failure by applying external loads near the supports to determine their ultimate shear capacities. The measured results were then compared to calculated values obtained using the AASHTO LRFD bridge design code, and the ACI 318-08 design code. Prestress losses were also measured by means of a cracking test and then compared to values calculated according to the AASHTO prestress loss equations. Both the ultimate shear capacities and the residual prestress forces were used to evaluate the girders after being in service for more than 40 years.
Book Synopsis Shear Behavior of Spliced Post-tensioned Girders by : Andrew Michael Moore
Download or read book Shear Behavior of Spliced Post-tensioned Girders written by Andrew Michael Moore and published by . This book was released on 2014 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: By its nature a spliced girder must contain a number of post tensioning tendons throughout its length. The focus of the experimental program described in this dissertation is the evaluation of the strength and serviceability of post-tensioned girders loaded in shear, and, more specifically, how a post-tensioning duct located in the web of a girder affects the shear transfer mechanism of a bulb-tee cross-section. Due to the limited number of tests in the literature conducted on full-scale post-tensioned girders, eleven shear tests were performed on seven prestressed concrete bulb-tee girder specimens. Of these tests, ten were conducted on specimens that contained a post-tensioning duct within their web and additional pretensioning reinforcement in their bottom and top flanges. The remaining shear test was conducted on a control specimen that did not have a post-tensioning tendon but contained the same pretensioning reinforcement as the post-tensioned girder specimens. The behavioral characteristics of these eleven test specimens at service level shear forces and at their ultimate shear strengths were evaluated in regards to five primary experimental variables: (i) the presence of a post-tensioning duct, (ii) post-tensioning duct material (plastic or steel), (iii) web-width, (iv) duct diameter, and (v) the transverse reinforcement ratio. The findings of this experimental study are described in detail within this dissertation, but can be summarized by the following two points. (i) No differences were observed in the ultimate or service level shear behavior in girders containing plastic grouted ducts when compared to those containing steel grouted ducts and (ii) The current procedure of reducing the effective web width to account for the presence of a post-tensioning duct is ineffective because it addresses the incorrect shear transfer mechanism. A method that correctly addresses the reduction in shear strength due to the presence of a post-tensioning duct was developed and verified using the tests performed during this experimental program and tests reported in the literature.
Book Synopsis Fatigue behavior of prestressed concrete girders by : Gregg Arthur Reese
Download or read book Fatigue behavior of prestressed concrete girders written by Gregg Arthur Reese and published by . This book was released on 1983 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Increasing the Allowable Compressive Stress at Release of Prestressed Concrete Girders by : David Barra Birrcher
Download or read book Effects of Increasing the Allowable Compressive Stress at Release of Prestressed Concrete Girders written by David Barra Birrcher and published by . This book was released on 2007 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design and Fatigue Behavior of Near-surface Mounted CFRP Bars for Shear Strengthening of RC Bridge Girders by : Brandon Ang Johnson
Download or read book Design and Fatigue Behavior of Near-surface Mounted CFRP Bars for Shear Strengthening of RC Bridge Girders written by Brandon Ang Johnson and published by . This book was released on 2011 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon fiber reinforced polymer (CFRP) materials are emerging as an effective means of strengthening and rehabilitating bridges. Near surface mounting (NSM) is a newer technique for application of CFRP for retrofitting of bridge members that provides advantages over conventional strengthening techniques. The technique is still new and uncertainties remain regarding design including the influence of member proportions, flexural reinforcing steel, and CFRP spacing. Further, retrofitted girders may also be exposed to millions of cycles of loading after rehabilitation. It is not known if the effects of fatigue loading will affect the service life of the retrofitted member. To address these issues, laboratory tests were performed on eight full-size reinforced concrete girders, representative of in-situ bridge girders, to determine the performance of NSM-CFRP retrofitting for shear. Two of the specimens were exposed to fatigue loading. Results indicated that NSM-CFRP retrofitting provides significant shear capacity increases and exposure to fatigue cycling did not affect the strength or behavior of the specimens.
