Time Dependent Behavior Of Noncomposite And Composite Post Tensioned Concrete Girder Bridges
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Time Dependent Behavior Of Noncomposite And Composite Post Tensioned Concrete Girder Bridges
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Author : A. I. Fadl
language : en
Publisher:
Release Date : 1976
Time Dependent Behavior Of Noncomposite And Composite Post Tensioned Concrete Girder Bridges written by A. I. Fadl and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Bridges, Concrete categories.
Time Dependent Behavior Of Noncomposite And Composite Post Tensioned Concrete Girder Bridges
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Author : A. I. Fadl
language : en
Publisher:
Release Date : 1976
Time Dependent Behavior Of Noncomposite And Composite Post Tensioned Concrete Girder Bridges written by A. I. Fadl and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Bridges, Concrete categories.
Time Dependent Deformation Of Non Composite And Composite Sand Lightweight Prestressed Concrete Structures
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Author : Dan E. Branson
language : en
Publisher:
Release Date : 1969
Time Dependent Deformation Of Non Composite And Composite Sand Lightweight Prestressed Concrete Structures written by Dan E. Branson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with Bridges categories.
Presented in this report is an investigation of the use of "sand-lightweight" concrete in prestressed concrete structures. The sand-lightweight concrete consists of 100% sand substitution for fines, along with Idealite coarse and medium lightweight aggregate and Type I Portland Cement. The study is divided into three parts: a materials study of the concrete itself, a laboratory study of the behavior of both non-composite (5 beams) and composite (4 beams) prestressed beams, and the field measurement of camber of prestressed bridge girders (5 girders). The test period for the laboratory beams was 5 months, although the data collection is continuing for 3 of the beams. The test period included in this report for the bridge girders was 4 months. The laboratory beams were designed in three groups (3 beams in each group) to investigate the loss of prestress, initial and time-dependent camber, load-deflection behavior, and effect of different slab casting schedules. Of principal interest in this Phase I study is the time-dependent behavior of sand-lightweight concrete as a material and as used in prestressed structures. This includes the loss of prestress and camber of members that undergo rather high initial strains (due to both high initial stresses and relatively low modulus of elasticity); the effect of the composite deck in reducing the stress level and corresponding creep rate and loss of prestress; and the effect of the time of casting the composite slab, since the rate of creep, loss of prestress, and camber growth are quite different before and after the slab is cast. Design procedures are presented for the following: 1. Calculation of creep and shrinkage of the sand-lightweight concrete of this project at any time after casting, including ultimate values. An indication is also given of the calculation of creep and shrinkage at any time after casting, including ultimate values, for normal weight, sand-lightweight, and all-lightweight concrete in general. 2. Both theoretical and approximate methods for calculating camber of non-composite and composite prestressed structures. Results computed by these methods are shown to be in reasonably good agreement with the control specimen data, the laboratory beam data, and the bridge girder data.
Field Investigation Of Prestressed Reinforced Concrete Highway Bridges
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Author : William Leo Gamble
language : en
Publisher:
Release Date : 1980
Field Investigation Of Prestressed Reinforced Concrete Highway Bridges written by William Leo Gamble and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Bridges categories.
Work accomplished over the 14.5 year life of this project is summarized, and the reports published as part of the study are referenced. Implementation of the results of the study has already been accomplished in two areas. The current loss-of-prestress provisions in the AASHTO Bridge Specification are based on recommendations prepared as part of the work of this project. Illinois DOT has stopped using span diaphragms in prestressed concrete highway bridges as a result of recommendations based on another phase of the study. The work be divided into three relatively separate phases. The first phase was the installation of deformation measuring instrumentation in three in-service bridges, the gathering of data, and the development of analysis procedures that enabled the data to be interpreted. The second phase involved the construction of relatively small scale prestressed bridge components, and their use to provide data to help confirm some information developed in the field study. The models were later tested to failure, and additional information about overload behavior was gained. The third phase was a study of the effects of span diaphragms on moment distributions in bridges, and it was concluded that these members were cost-ineffective and that their use should be discontinued.
Time Dependent Deformations In Segmental Prestressed Concrete Bridges
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Author : Vernon Marshall
language : en
Publisher:
Release Date : 1981
Time Dependent Deformations In Segmental Prestressed Concrete Bridges written by Vernon Marshall and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Concrete categories.
Long Term Behavior Of A Prestressed I Girder Highway Bridge In Champaign County Illinois
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Author : William Leo Gamble
language : en
Publisher:
Release Date : 1979
Long Term Behavior Of A Prestressed I Girder Highway Bridge In Champaign County Illinois written by William Leo Gamble and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Concrete bridges categories.
Time Dependent Deformation Behavior Of Prestressed High Performance Concrete Bridge Beams
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Author : Kenneth Arlan Byle
language : en
Publisher:
Release Date : 1997
Time Dependent Deformation Behavior Of Prestressed High Performance Concrete Bridge Beams written by Kenneth Arlan Byle and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Tests Of A Precast Post Tensioned Composite Bridge Girder Having Two Spans Of 124 Feet
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Author : A. I. Fadl
language : en
Publisher:
Release Date : 1977
Tests Of A Precast Post Tensioned Composite Bridge Girder Having Two Spans Of 124 Feet written by A. I. Fadl and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Concrete beams categories.
Time Dependent Behavior Of Segmental Cantilever Concrete Bridges
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Author : K. Nam Shiu
language : en
Publisher:
Release Date : 1983
Time Dependent Behavior Of Segmental Cantilever Concrete Bridges written by K. Nam Shiu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Bridges, Cantilever categories.
Time Dependent Behaviour Of Concrete Structures
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Author : Raymond Ian Gilbert
language : en
Publisher: CRC Press
Release Date : 2010-09-15
Time Dependent Behaviour Of Concrete Structures written by Raymond Ian Gilbert and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-09-15 with Technology & Engineering categories.
Serviceability failures of concrete structures involving excessive cracking or deflection are relatively common, even in structures that comply with code requirements. This is often as a result of a failure to adequately account for the time-dependent deformations of concrete in the design of the structure. The serviceability provisions embodied in codes of practice are relatively crude and, in some situations, unreliable and do not adequately model the in-service behaviour of structures. In particular, they fail to adequately account for the effects of creep and shrinkage of the concrete. Design for serviceability is complicated by the non-linear and inelastic behaviour of concrete at service loads. Providing detailed information, this book helps engineers to rationally predict the time-varying deformation of concrete structures under typical in-service conditions. It gives analytical methods to help anticipate time-dependent cracking, the gradual change in tension stiffening with time, creep induced deformations and the load independent strains caused by shrinkage and temperature changes. The calculation procedures are illustrated with many worked examples. A vital guide for practising engineers and advanced students of structural engineering on the design of concrete structures for serviceability and provides a penetrating insight into the time-dependent behaviour of reinforced and prestressed concrete structures.