Research Article
Oct 1980
Hysteretic Fracturing Endochronic Theory for Concrete
Authors: Zdeněk P. Bažant, F.ASCE, and Ching-Long ShiehAuthor Affiliations
Publication: Journal of the Engineering Mechanics Division
Volume 106, Issue 5
Abstract
An improved endochronic nonlinear triaxial constitutive relation for concrete is developed: (1)In addition to plastic strain increments proportional to stress tensor, fracturing strain increments proportional to strain tensor are used to model strain-softening; (2)the plastic and fracturing inelastic strain increments are characterized by different intrinsic times; (3)degradation of the elastic shear modulus is determined by the intrinsic time for the fracturing strain increments, and degradation of the bulk modulus is related to that of the shear modulus using Budianski-O'Connell's expressions for the elastic moduli of randomly microcracked material; (4)jump-kinematic hardening, in which the center of the loading surface jumps into the current stress and strain point whenever loading reverses to unloading or vice versa, is introduced. The theory also exhibits hydrostatic pressure sensitivity, inelastic dilatancy, initial shear compaction in triaxial loading, and inelastic strain due to hydrostatic pressure.
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Published In
Journal of the Engineering Mechanics Division
Volume 106 • Issue 5 • October 1980
Pages: 929 - 950
Copyright
© 1980 American Society of Civil Engineers.
History
Published in print: Oct 1980
Published online: Feb 3, 2021
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Authors
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Zdeněk P. Bažant, F.ASCE
Prof. of Civ. Engrg., Northwestern Univ., Evanston, Ill.
Ching-Long Shieh
Struct. Engrg. Specialist, Sargent and Lundy, Engrs., Chicago, Ill.; formerly, Post-Doctoral Assoc., Northwestern Univ., Evanston, Ill.
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