Research Article
Nov 1974
Displacements and Losses in Multistage Prestressed Members
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VIEW THE REPLYAuthors: Amin Ghali, M.ASCE, Romy G. Sisodiya, and Gamil S. TadrosAuthor Affiliations
Publication: Journal of the Structural Division
Volume 100, Issue 11
Abstract
This paper presents a numerical procedure to calculate the loss of prestress, the strain at centroid, and the curvature in concrete beams prestressed in a number of stages. The loss calculated is caused by instantaneous deformations, relaxation of steel, shrinkage, and creep of concrete. Account is made of the elastic and creep recoveries of concrete and the effect of variation of stress level on the relaxation of steel. Included is an application to find the losses and deflections of a prestressed concrete bridge built by the cantilever method (consecutive segments cast and prestressed in multistages).
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Published In
Journal of the Structural Division
Volume 100 • Issue 11 • November 1974
Pages: 2307 - 2322
Copyright
© 1974 American Society of Civil Engineers.
History
Published in print: Nov 1974
Published online: Feb 1, 2021
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Affiliations
Amin Ghali, M.ASCE
Prof. of Civ. Engrg., Univ. of Calgary, Calgary, Alberta, Canada
Romy G. Sisodiya
Visiting Asst. Prof., Dept. of Civ. Engrg., McGill Univ., Montreal, Quebec, Canada
Gamil S. Tadros
Research Assoc., Dept. of Civ. Engrg., Univ. of Calgary, Calgary, Alberta, Canada
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.