Research Article
Sep 1973
Comparison of Approximate Linear Methods for Concrete Creep
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VIEW THE REPLYAuthors: Zdeněk P. Bažant, M.ASCE, and Leonard J. NajjarAuthor Affiliations
Publication: Journal of the Structural Division
Volume 99, Issue 9
Abstract
The approximate methods for prediction of structural effects of creep, such as the effective modulus (EMM), age-adjusted effective modulus (AEMM), rate of creep (RCM), rate of flow (RFM), and Levi's and Arutyunian's methods are all linear and satisfy the principle of superposition. Predictions of the approximate methods are compared with the exact numerical solutions based on the principle of superposition and given (undistorted) realistic unit creep curves. It is found that AEMM is in general superior to all other methods and along with EMM is also the simplest one. RFM (with effective modulus treatment of delayed elastic strain) appears as second best and should be resorted to when the table of aging coefficient required by AEMM is unavailable.
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Published In
Journal of the Structural Division
Volume 99 • Issue 9 • September 1973
Pages: 1851 - 1874
Copyright
© 1973 American Society of Civil Engineers.
History
Published in print: Sep 1973
Published online: Feb 1, 2021
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Zdeněk P. Bažant, M.ASCE
Prof. of Civ. Engrg., Northwestern Univ., Evanston, Ill.
Leonard J. Najjar
Grad. Research Asst., Northwestern Univ., Evanston, Ill.
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