Title:
Time-Dependent Section Analysis of Prestressed Concrete Beams
Author(s):
Publication:
CIA
Volume:
Issue:
Appears on pages(s):
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DOI:
Date:
2/13/2011
Abstract:
This paper presents a method to determine the time-dependent deflections in post-tensioned concrete beams. At this preliminary stage of the investigation an analytical model is presented to describe the time-dependent stress, strain and curvature at a prestressed concrete beam section considering
concrete shrinkage and creep. Computation of prestress loss and the stress distribution in concrete, prestressed and non-prestressed steel due to time-dependent effects of creep and shrinkage is
presented. The analysis is divided into several stages according to the load history and time. A Flow chart is included for implementing the method by a computer program. A numerical example is presented to illustrate the proposed method and a limited investigation into the effect of creep, shrinkage and load history on predicted curvatures.