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| THREE-DIMENSIONAL ANISOTROPIC REVISION AND EXPERIMENTAL VERIFICATION OF ELLIPTIC PARABOLIC DOUBLE YIELD SURFACE ELASTOPLASTIC MODEL |
| ZHANG Kunyong1，2，WEN Debao1，2，MA Qihao1，2 |
(1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering，Hohai University，Nanjing，
Jiangsu 210098，China；2. Geotechnical Research Institute，Hohai University，Nanjing，Jiangsu 210098，China) |
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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.
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Received: 01 November 2012
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2013, Vol. 32 
