Box Beams For Prestressed Concrete Bridges Test Of A Model Through Voided Box Beam Bridge
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Box Beams For Prestressed Concrete Bridges Test Of A Model Through Voided Box Beam Bridge
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Author :
language : en
Publisher:
Release Date : 1967
Box Beams For Prestressed Concrete Bridges Test Of A Model Through Voided Box Beam Bridge written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Box beams categories.
Box Beams For Prestressed Concrete Bridges Part 3
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Author : Pennsylvania. Department of Highways. Bureau of Testing and Research
language : en
Publisher:
Release Date : 1970
Box Beams For Prestressed Concrete Bridges Part 3 written by Pennsylvania. Department of Highways. Bureau of Testing and Research and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with categories.
Box Beams For Prestressed Concrete Bridges Summary Of Previous Research And Recommendations For Future Testing
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Author :
language : en
Publisher:
Release Date : 1967
Box Beams For Prestressed Concrete Bridges Summary Of Previous Research And Recommendations For Future Testing written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Box beams categories.
Box Beams For Prestressed Concrete Bridges Through Voided And Conventional Box Beams Subjected To Combined Bending And Torsion
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Author :
language : en
Publisher:
Release Date : 1969
Box Beams For Prestressed Concrete Bridges Through Voided And Conventional Box Beams Subjected To Combined Bending And Torsion written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with Box beams categories.
Box Beams For Prestressed Concrete Bridges Part I
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Author :
language : en
Publisher:
Release Date : 1967
Box Beams For Prestressed Concrete Bridges Part I written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with categories.
Condition Assessment And Methods Of Abatement Of Prestressed Concrete Box Beam Deterioration Phase Ii
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Author :
language : en
Publisher:
Release Date : 2009
Condition Assessment And Methods Of Abatement Of Prestressed Concrete Box Beam Deterioration Phase Ii written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Box beams categories.
Side-by-side box-beam bridge constitutes approximately 17 percent of bridges built or replaced annually on public roads and there is a renewed thrust to use this bridge type for rapid construction under the Highway for LIFE program. Further, failure of a fascia girder of Lakeview Drive bridge in Pennsylvania on December 27, 2005 and with a large number of aging bridges in the U.S., highway agencies are concerned about the safety of similar bridges. This project was developed to evaluate the capacity of distressed box-beam through load testing; investigate the impact of distress types identified during phase I of this project on flexure and shear capacities of a beam in a structural system; identify proper materials and methods for long lasting repairs to improve the structural integrity of distressed box-beam bridges; and by performing simulations of the construction process using finite element (FE) models investigate stresses developed in components during each stage of construction and under operation, develop recommendations for changes or modifications to the design procedures, construction process, material specifications, and to the maintenance and repair techniques of side-by-side boxbeam bridge deck. Six tasks were performed in this project ranging from literature review, instrumentation and load testing of a severely deteriorated fascia beam, laboratory investigation of fresh and hardened (durability) properties of shear key grout and repair materials, evaluation of mechanical properties of shear key grout and repair materials, construction process simulation, and evaluation of flexural and shear capacities of distressed beams considering structural system behavior. Recommendations of this project include selection of repair and shear key material, development of comprehensive inspection procedures to assure bridge safety and implementation of the rational design procedure given in the report for improved durability.
Public Roads
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Author :
language : en
Publisher:
Release Date : 1968
Public Roads written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Highway research categories.
Condition Assessment And Methods Of Abatement Of Prestressed Concrete Box Beam Deterioration Phase Ii
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Author :
language : en
Publisher:
Release Date : 2009
Condition Assessment And Methods Of Abatement Of Prestressed Concrete Box Beam Deterioration Phase Ii written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Box beams categories.
Side-by-side box-beam bridge constitutes approximately 17 percent of bridges built or replaced annually on public roads and there is a renewed thrust to use this bridge type for rapid construction under the Highway for LIFE program. Further, failure of a fascia girder of Lakeview Drive bridge in Pennsylvania on December 27, 2005 and with a large number of aging bridges in the U.S., highway agencies are concerned about the safety of similar bridges. This project was developed to evaluate the capacity of distressed box-beam through load testing; investigate the impact of distress types identified during phase I of this project on flexure and shear capacities of a beam in a structural system; identify proper materials and methods for long lasting repairs to improve the structural integrity of distressed box-beam bridges; and by performing simulations of the construction process using finite element (FE) models investigate stresses developed in components during each stage of construction and under operation, develop recommendations for changes or modifications to the design procedures, construction process, material specifications, and to the maintenance and repair techniques of side-by-side boxbeam bridge deck. Six tasks were performed in this project ranging from literature review, instrumentation and load testing of a severely deteriorated fascia beam, laboratory investigation of fresh and hardened (durability) properties of shear key grout and repair materials, evaluation of mechanical properties of shear key grout and repair materials, construction process simulation, and evaluation of flexural and shear capacities of distressed beams considering structural system behavior. Recommendations of this project include selection of repair and shear key material, development of comprehensive inspection procedures to assure bridge safety and implementation of the rational design procedure given in the report for improved durability.
Structural Model Of A Prestressed Concrete Box Girder Bridge
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Author : M. J. N Priestley
language : en
Publisher:
Release Date : 1972
Structural Model Of A Prestressed Concrete Box Girder Bridge written by M. J. N Priestley and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Box girder bridges categories.
Load Rating And Evaluation Of Two Prestressed Concrete Box Girder Bridges With No Plans Using Non Destructive Load Testing
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Author : Dagmawie Degif Shikurye
language : en
Publisher:
Release Date : 2014
Load Rating And Evaluation Of Two Prestressed Concrete Box Girder Bridges With No Plans Using Non Destructive Load Testing written by Dagmawie Degif Shikurye and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Prestressed concrete bridges categories.
Bridges with no plans are currently an issue in various states including New Mexico as many exist throughout the United States. Since these bridges have no existing plans and documentation, conventional load rating procedures can't be employed. Therefore in this research project, a four step procedure was developed for the load rating of prestressed concrete box girder bridges without plans. First, the total number and eccentricity of the prestressing strands in the bridge beams are estimated using Magnel diagrams. Second, material properties are obtained from the AASHTO Manual for Bridge Evaluation, AASHTO Standard Specifications, and/or the New Mexico provisions. Second, a Hilti PS 250 Ferroscan is used to detect the steel in the prestressed concrete beams and check the strand estimate and also determine the layout of the shear reinforcement. In addition, the concrete strength is estimated using a Windsor probe. Third, a diagnostic load test is performed to evaluate the in-service behavior and to measure the beam strains under a truck load approximately 60% of the target proof load determined based on the prestressing strand estimate and allowable tensile stress at service. Strain measurements are taken at critical locations to monitor the bridge response during the test. The objectives of this test are to determine the critical transverse truck path (i.e., ones producing the largest measured strains) and compare the measurements with analytical predictions. Fourth, a proof load test is conducted following the critical truck paths and under increasing truck loading until the allowable tensile stress or the target proof load is reached (whichever comes first). Results from the proof test are used to determine rating factors for legal loads. The AASHTOWare BrR software program is also used for purpose of comparison with the rating factors from the proof test. Two prestressed concrete box girder bridges in New Mexico located in Doña Ana County (Bridge 7722) and Bernalillo County (Bridge 8825) were evaluated in this study. For Bridge 7722, the BrR design ratings under HS-20 truck loading were computed as 1.073 and 1.791 at the inventory and operating level, respectively. Inventory and operating factors of 0.882 and 1.403, respectively, were obtained for Bridge 8825. These results, in particular the operating ratings greater than 1.0, provided the needed confidence to proceed with the load tests. Based on the results of the proof tests, rating factors were computed for New Mexico and AASHTO legal loads according to the AASHTO Manual for Bridge Evaluations. The lowest rating factors were 1.09 and 1.17 for Bridge 7722 and Bridge 8825, respectively, which showed that the two bridges did not need to be load posted for legal loads.