Creep and Shrinkage Analysis of Partially Prestressed Concrete Members
Publication: Journal of Structural Engineering
Volume 115, Issue 5
Abstract
An analytical approach to calculate time‐dependent stresses and strains in initially cracked reinforced and partially prestressed concrete members with or without nonprestressed reinforcement is presented. The method utilizes Trost's relaxation coefficient approach and the aging coefficient approach of Bazant in addition to the linear creep theory. Noncoincidence of the neutral axis of stress with the neutral axis of strain is taken into account in the analysis. Necessary expressions are developed for the general case of a partially prestressed beam of unsym‐metrical I section from which expressions for the special cases of reinforced concrete members of either rectangular or T shape, with or without compression reinforcement are deduced. With these algorithms, a comparative analysis of the effects of the quantity and position of the compression reinforcement, prestressed reinforcement, and nonprestressed tensile reinforcement is made. Four examples are given to demonstrate the method of analysis.
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Information & Authors
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Published In
Journal of Structural Engineering
Volume 115 • Issue 5 • May 1989
Pages: 1169 - 1189
Copyright
Copyright © 1989 ASCE.
History
Published online: May 1, 1989
Published in print: May 1989
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