考虑压剪耦合特性的岩土材料广义非线性屈服准则

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Abstract A new generalized nonlinear yield criterion(GNYC) is proposed to describe the yield and failure behaviors of geomaterials，including the coupling behavior of shearing and compression，through extending the generalized nonlinear strength theory(GNST). The interpolation function between SMP criterion and generalized von Mises criterion is adopted as the yield function of the new criterion on deviatoric plane；while the closed curve function considering coupling behavior of shearing and compression is adopted as the yield function on meridian plane. As the yield function is established in the transitional stress space，the nonlinear power function is adopted as the failure curve in new yield criterion，which can be described using the proposed criterion compared to the MNLD criterion(interpolation criterion between Matsuoka-Nakai criterion and Lade-Duncan criterion). The influence of the variation of hydrostatic stress on yield behavior on deviatoric and meridian planes can also be described more reasonably by the new criterion. There are physical meanings for all parameters in the new criterion and the values of parameters can all be determined by conventional tests. The validity of the new criterion is confirmed by data from yield and failure tests of different geomaterials.

Key words： rock and soil mechanics geomaterials strength criterion SMP criterion generalized von Mises criterion

Received: 17 April 2013

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https://rockmech.whrsm.ac.cn/EN/Y2014/V33/I2/376

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