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Time Dependent Deformation Of Non Composite And Composite Sand Lightweight Prestressed Concrete Structures

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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.

Time Dependent Deformation Of Non Composite And Composite Prestressed Concrete Structures

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Author : Dan E. Branson
language : en
Publisher:
Release Date : 1970

Time Dependent Deformation Of Non Composite And Composite 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 1970 with Bridges categories.

Prestressed Concrete Designer S Handbook

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Author : P.W. Abeles
language : en
Publisher: CRC Press
Release Date : 2014-04-01

Prestressed Concrete Designer S Handbook written by P.W. Abeles and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-04-01 with Architecture categories.

The third edition of this authoritative handbook provides the structural designer with comprehensive guidance on prestressed concrete and its effective use, covering materials, behaviour, analysis and design of prestressed elements. It includes numerous examples, design charts and details of post-tensioning systems.

Deflections Of Concrete Structures

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Author :
language : en
Publisher:
Release Date : 1974

Deflections Of Concrete Structures written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Reinforced concrete construction categories.

Highway Research Record

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Author :
language : en
Publisher:
Release Date : 1970

Highway Research Record written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Highway research categories.

Shrinkage And Creep In Concrete 1966 1970

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Author : ACI Committee 209--Creep and Volume Changes in Concrete
language : en
Publisher:
Release Date : 1972

Shrinkage And Creep In Concrete 1966 1970 written by ACI Committee 209--Creep and Volume Changes in Concrete and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Concrete categories.