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针对修正后的Mohr-Coulomb准则采用基于Euler向后积分的自适应子增量本构积分算法推导得到的一致性切线刚度矩阵,以ABAQUS软件为平台,编制UMAT本构程序.进行了平面应变条件下单轴受压的数值验证后,用上述程序以强度储备系数法来验证了修正后的Mohr-Coulomb准则在重力坝抗滑稳定中的可靠性,结果表明编写的修正后的Mohr-Coulomb模型能够有效地反映重力坝深层抗滑破坏的特性,结果偏安全.
According to the modified Mohr-Coulomb criterion, the consistent tangent stiffness matrix derived from the adaptive sub-incremental constitutive integral algorithm based on the Euler back-integration is used to construct the UMAT constitutive program based on the ABAQUS software.The plane strain condition After the numerical verification of the uniaxial compression, the reliability of the modified Mohr-Coulomb criterion in anti-sliding stability of the gravity dam is verified by the above-mentioned program using the strength reserve coefficient method. The results show that the revised Mohr-Coulomb model Can effectively reflect the characteristics of gravity dam deep skid damage, the results partial safety.