【摘要】 目的 通过输入不同类型震动强度、频率和持时的地震波，探讨地震作用下斜坡的动力特性和动力参数对斜坡动力响应的影响。方法 以四川昌都雪隆囊滑坡为原型，设计制作了1∶1 000的试验模型，开展了包含软弱岩性组合和贯通性结构面的反倾岩质斜坡的振动台模型试验。结果 强震作用下，加速度放大系数沿坡面和坡内竖直方向随着高程的增大而增加，沿水平方向呈现节律性变化。加速度放大系数随着输入频率的增大而增加；随着输入振幅的增大呈现先增大后减小，出现明显拐点的振幅为0.4 g。持时对斜坡动力响应影响最小。相较于汶川卧龙波，茂县波对斜坡的动力响应更加明显。结论 加速度放大系数有明显的高程放大效应和趋表效应；动力参数对斜坡加速度放大效应有不同程度的影响，频率影响最大，振幅次之，持时影响最小。输入地震波频率越接近斜坡的自振频率，对斜坡的影响也越大。更多还原

【Abstract】 To investigate the influence of dynamic characteristics and parameters on the dynamic response of slope under earthquake by inputting seismic waves of different types, different amplitude, different frequency and different duration.A shaking table model test of anti-dip rock slope of weak lithologic association and a penetrating structural plane with the scale of 1∶1000 was designed based on the Xuelongnang landslide in Chang du city Sichuan province.Results show that the acceleration amplification coefficient increases along the slope surface and vertical direction in the slope body with the increase of elevation under the action of strong earthquake, and presents a rhythmic change along the horizontal direction.The acceleration amplification coefficient increases with the increase of input frequency.As the input amplitude increases, it increases first and then decreases, and the amplitude value with obvious inflection point is 0.4 g.The influence of duration on the dynamic response of slope is the least.Compared with the Wenchuan Wolong wave, the dynamic response of Maoxian wave to the slope is more obvious.The acceleration amplification coefficient has obvious elevation amplification effect along the slope surface and vertical direction in the slope body and surface amplification effect along the horizontal direction.Seismic parameters have different effects on slope acceleration amplification effect.The frequency has the greatest influence, then amplitude, Duration has minimal effect.The closer the frequency of the input seismic wave is to the natural frequency of the slope, the greater the influence on the slope is.更多还原