Strain‐Based Constitutive Model with Mixed Evolution Rules for Concrete
Publication: Journal of Engineering Mechanics
Volume 118, Issue 6
Abstract
The theories of continuum damage mechanics and plasticity are combined in a strain‐based phenomenological approach to yield an effective constitutive model for plain concrete. The model reproduces the majority of the typical behavior exhibited by plain concrete: anisotropic stiffness evolution, pressure‐dependent ductility and strength, postpeak dilation, recovery of stiffness upon reverse loading, and permanent deformations. The proposed combination of continuum damage mechanics and plasticity theory is unique in that: (1) A strain‐based formulation is used; (2) a separate “inelastic” surface is postulated for the tensile regime and the compressive regime; (3) the inelastic surfaces are used for both damage evolution and permanent deformation; and (4) an isotropic evolution law is used for compression and a kinematic law for tension. The model requires a modest number of material constants (10). Strain‐softening considerations are discussed, relative to implementation of the model into numerical methods for solution of boundary value problems; however, only laboratory data from tests on small specimens are evaluated. The model's effectiveness is shown through comparisons with three sets of experimental data.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 118 • Issue 6 • June 1992
Pages: 1184 - 1200
Copyright
Copyright © 1992 ASCE.
History
Published online: Jun 1, 1992
Published in print: Jun 1992
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