中文摘要：

通过对节理岩质边坡输入6组不同频率、波形的模拟及实测地震波进行计算,研究边坡在地震过程中的变形时程响应。根据对预置监测点的位移时程曲线的分析,将边坡在地震过程的变形可划分为变形启程、变形累积及稳定(失稳)3个阶段及启程剧动、临界变形2个关键点;并通过对边坡动力响应规律的总结和探讨,验证节理岩质边坡在地震过程中,位移的边缘放大效应。计算结果表明:等效地震波波形和频率对计算结果有较大影响,4种不同波形的正弦波产生的极限位移相差1倍,采用振幅由小到大的正弦波替代实测地震波能获得更为接近实际情况的计算结果。地震波频率的高低对边坡的累积变形影响较大,高频快速振动会加速边坡变形的累积和失稳,地震波的高频部分控制边坡的累积变形,低频部分控制边坡变形的启程。

英文摘要：

Study of the influence of seismic wave form and frequency on the time history analysis of jointed rock slope is conducted. Six different types of seismic waves are used. According to the displacement time history curves of the special monitoring points,the deformation process of jointed rock slope can be divided into three phases and two critical points. The three phases are as follows:deformation set-out phase,deformation accumulate phase and stable(unstable) phase;and the two critical points are set-out violent-slide point and deformation critical point. At the same time,edge enlarge effects of displacement are proved by the laws of dynamic response of slope. Calculation results show that the seismic wave form and frequency play important roles in the calculation. Based on this study,the limited displacement can vary about one time among four extreme cases where four different seismic acceleration sine curves are used. Sine wave of which amplitude becomes larger gradually is more reasonable to replace the actual seismic wave for the calculation. The frequency of seismic also has great effect on the deformation of slope. In fact,high frequency seismic wave controls the deformation accumulation of slope,while low frequency seismic wave controls the set-out of the slope deformation.