椭圆抛物双屈服面弹塑性模型三维各向异性修正及其试验验证

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Abstract Coarse granular materials are the important construction materials of earth-rock dam. The stress and strain behaviors of coarse granular materials influenced typically by the initial stress states and following construction process. A revised double yield surface elastoplastical constitutive model is presented based on laboratory true triaxial testing. Stress transformation is applied；and a new stress ratio parameter is introduced to change yield locus and hardening axis，through which the anisotropy could be simulated. Comparison between the testing data and the model predictions shows that the revised anisotropic model reasonably describes the strength and deformation characteristics of the coarse grained soil under complex stress states.

Key words： building material coarse granular materials anisotropy double yield surface model

Received: 01 November 2012

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http://www.rockmech.org/EN/Y2013/V32/I8/1692

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