中文摘要：

在循环荷载作用下，边坡岩土体除了受到静态力作用外还受到动荷载的长期作用，岩土体对动荷载产生响应，易引发或加剧边坡失稳。以某路堑边坡为研究对象，研究在不同动力输入条件下边坡岩土响应规律。研究结果表明，当循环荷载的振动频率一定时，边坡各测点的位移、速度、加速度随循环荷载最大振幅的增大而增大，呈明显的线性关系；当循环荷载的最大振幅一定时，边坡的动力响应峰值与频率不再是线性关系，而是出现波动变化，存在4～5Hz频段范围的强响应频段区问，这一频段与边坡岩土体卓越周期（频率）基本一致，易引起边坡的共振响应，而这种共振响应对边坡稳定是不利的。研究结果对合理评价循环荷载对岩土边坡的影响、对岩土边坡的长期安全性及耐久性分析具有重要的理论意义和工程应用价值。

英文摘要：

There are responses of slope under long-term cyclic load, and the degradation of mechanical capability of slope soils causes the slope to become unstable and trigger the movement. The dynamic responses of a highway slope under cyclic load are presented by a finite element numerical simulation method. The results show that the displacement, velocity and acceleration of the monitoring point on slope increase linearly with the increase of the maximum amplitude of cyclic load with a constant vibration frequency. However, the maximum response values of the slope under the cyclic load with a constant vibration amplitude are not proportional to the frequency, and there is a strong response in the frequency band of 4 - 5 Hz, approaching to predominant frequency of the slope. It is possible for the slope system under the frequency band of cyclic load to arise a disadvantageous resonance for the stability of the slope. It is of theoretical and practical significance to evaluate the long-term stability and durability of the highway slopes under dynamic load.