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基于近来发展的临界土力学模型CASM,提出了考虑强度参数C影响的模型CASM-hc.以ABAQUS为二次开发平台,编制了模型CASM-hc的用户子程序,并计算模拟了中常压以及高压作用下的三轴不排水剪切试验.结果表明,模型CASM-hc能较好反映中常压和高压作用下饱和黏土临界强度特征,高压作用下不计C影响的计算临界剪切应力比可大于相应试验值0.66倍;若高压作用下饱和黏土的C值减小,则计算峰值偏应力和孔隙水压力均相应减小,且其减小幅值是C减小幅值的1.44倍.
Based on CASM, a model of critical soil mechanics developed recently, a model CASM-hc considering the influence of intensity parameter C is proposed. With ABAQUS as the secondary development platform, a user subroutine of model CASM-hc is compiled, The results show that the model CASM-hc can better reflect the critical strength characteristics of saturated clay under medium-pressure and high-pressure conditions and the calculated critical shear stress ratio under high pressure without C influence Which is 0.66 times higher than the corresponding experimental value. If the C value of saturated clay decreases under high pressure, the calculated peak deviatoric stress and pore water pressure decrease correspondingly, and the decreasing amplitude is 1.44 times of the decreasing amplitude of C.