中文摘要：

针对岩质边坡平面滑动问题和楔形体滑动问题，提出了一种考虑结构面退化的岩质边坡的地震永久位移算法，提供了该法实施的流程，并用3个实例进行了说明。计算结果和前人的计算结果进行了对比，发现该法与试验计算结果吻合较好，能很好的估计边坡地震永久位移量值。传统Newmark法不考虑结构面退化，计算结果一般过低的估计了边坡地震永久位移量值，它较为适合估计地震永久位移量值较小的边坡。

英文摘要：

A new approach for evaluating the permanent displacement of rock mass slope including planar slide and wedge slide during earthquake was presented, which considered deterioration of slide surface during earthquake. The procedure for putting the method into effect was put forward, and three case histories were studied. It was indicated that the approach was available and reasonable to assess the value of the permanent displacement of rock mass slope. The result reached by traditional Newmark method was too small in general. Traditional Newmark method was only suitable to evaluate the rock mass slope with small permanent displacement during earthquake.