中文摘要：

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.

英文摘要：

Based on Euler backward integration method,an integration algorithm of constitutive equation is suggested for adaptive sub-stepping schemes;and the consistent tangent matrices of modified Mohr-Coulomb criterion are derived.The UMAT subroutine of the modified Mohr-Coulomb model is developed in ABAQUS.After a uniaxial compression test,the simulation of the deep anti-sliding stability analysis of gravity dam is performed using the mentioned subroutine by strength reserve coefficient method.The simulation results show that the modified Mohr-Coulomb criterion is reliable and could effectively depict the deep sliding failure characteristics of gravity dam;the result is inclined to safe.