A theoretical model is proposed for the description of the static and fatigue behaviour of plain concrete under uni- and triaxial loading. The model is based on damage mechanics: it features two second-order symmetric damage tensors, representative of surface damage induced by tensile or compressive strains, and a scalar variable representative of volumetric damage. Assuming independence of tensile and compressive damage variables also allows accounting for crack-closure effects. A thermodynamically consistent damage evolution law is proposed. Permanent strains upon unloading are related to damage through empirical equations. The model can cover cyclic loading inducing fatigue by means of a simple extension requiring only one additional parameter to be determined. A possible strategy for the identification of the model parameters from experiments is outlined. The reliability of the model is assessed through comparison with results of static and cyclic tests.

Anisotropic damage model for the multiaxial static and fatigue behaviour of plain concrete

PAPA, ENRICO;TALIERCIO, ALBERTO
1996-01-01

Abstract

A theoretical model is proposed for the description of the static and fatigue behaviour of plain concrete under uni- and triaxial loading. The model is based on damage mechanics: it features two second-order symmetric damage tensors, representative of surface damage induced by tensile or compressive strains, and a scalar variable representative of volumetric damage. Assuming independence of tensile and compressive damage variables also allows accounting for crack-closure effects. A thermodynamically consistent damage evolution law is proposed. Permanent strains upon unloading are related to damage through empirical equations. The model can cover cyclic loading inducing fatigue by means of a simple extension requiring only one additional parameter to be determined. A possible strategy for the identification of the model parameters from experiments is outlined. The reliability of the model is assessed through comparison with results of static and cyclic tests.
plain concrete; triaxial stress; damage mechanics; anisotropy
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/530639
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