为研究土质边坡对循环荷载作用的动态响应规律，通过有限元对不同工况下土质边坡的振动响应进行模拟。结果表明，当循环荷载位置及加载频率一定时，边坡各测点竖向加速度、位移和速度响应峰值随循环荷载振幅增大而增大，且加速度和速度大致呈线性关系；各测点响应峰值随边坡高程变化而变化，测点离振源越近，动力响应越剧烈，响应增幅越大；当循环荷载位置及振幅一定时，边坡在1畅5～2畅5 Hz频段出现强响应，产生对其不利的共振现象；当循环荷载振幅及频率一定时，边坡的响应峰值随着荷载位置距坡肩距离（ L）减小而增加，当L超过10 m后边坡振动响应变化幅度趋于不变。研究结果对认识循环荷载对土质边坡的影响及合理评价边坡工程环境振动具有重要的工程应用价值。%In order to study the rule of soil slope dynamic response under cyclic loads , the soil slope dynamic response researches are performed under different working conditions by finite element .The experiments indicate that the acceleration , displacement and velocity of the monitoring point on slope increase with the increase of the maximum amplitude of cyclic load with a constant load position vibration frequency , and the acceleration and veloc-ity increase linearly .The maximum response values of the slope change with the slope height , near the seismic source ,dynamic response is more intense , and it gets greater the response amplitude;With a constant vibration am-plitude,there is a strong response in the frequency band of 1.5~2.5 Hz,producing disadvantageous sympathetic vi-bration.The maximum response values of the slope increase with the decrease of the slope shoulder distance ( L) , vibration response tends to stable when L exceeds 10 m.The results have important engineering application value for understanding the influence acting of traffic loads on soil slope and evaluating environmental vibration influence of slope engineering .
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