岩土体在地震作用下的破坏研究

Research on failure of rock and soil mass under earthquake

基于波动理论,从边坡岩土体的应力状态出发,分析了岩土体在地震作用下产生的动应力和重力作用产生的静应力共同作用下的应力状态。通过理论计算和数值模拟表明:对于土质边坡,坡顶附近的土体发生的是拉张破坏,以下部位发生的是剪切破坏;对于岩质边坡,坡顶附近岩体发生的是以结构面的拉张破坏为主的破坏,坡体下部发生剪切破坏;数值模拟的结果与计算结果具有良好的一致性。

Based on the stress state of rock and soil slope,analyzed the stress state of rock and soil mass which contains both the dynamic stress caused by earthquake and static stress caused by gravity.The calculations show that：as to the soil slope,close to the top of slope is tensile failure and below of it is shear failure;for the rock slope,close to the top of slop is tensile failure of structure plane and below of it is shear failure.Numerical simulation has good consistency with calculated results.