基于ABAQUS强度折减法的边坡稳定性分析

将大型有限元软件ABAQUS与强度折减有限元法相结合,对边坡的稳定性进行了分析.将折减系数以场变量的形式赋予ABAQUS,动态显示塑性区发生发展的过程.当塑性区贯通且位移和应变发生突变时,边坡处于破坏的临界状态,将此时的折减系数作为边坡的最小稳定系数.通过对工程实例的稳定性分析,并与传统的极限平衡法相比较,证明了该方法可以准确地预测滑动面位置及稳定系数;并对采用关联和非关联流动法则时边坡的稳定性进行了对比分析,发现采用前者时的稳定系数比采用后者时稍微偏高.

Analysis of slope stability by strength reduction FEM based on ABAQUS

The large finite element software ABAQUS has been combined with the shear strength reduction FEM for the analysis stability of the slope.The reduction factor plays a part in ABAQUS in the form of field variables,in order to make a dynamic display of the occurrence and development process of the plastic zone.When the plastic zone is transfixed with the stress and the placement suddenly changes,this means that the slope is in critical state.Through the stability analysis of engineering example,the reduction factor of this time as the minimum stability factor and the comparison with the limit equilibrium methods have proved that this method can forecast the slide surface and stability accurately.And a comparative analysis of non-associated flow rule with associated flow rule has been made.The results show that the adoption of the latter stability coefficient is better than the former.