竖直向上传播剪切波作用下边坡动力响应规律

摘要

Dynamic responses of the slopes were comprehensively studied and lots of numerical simulations were made.The maximum of the displacement and velocity of every gridpoint were recorded.One point in the bottom of the slope was made as a reference point to calculate the seismic dynamic response coefficient.On this basis,the contour figure of seismic dynamic response coefficient was gotten.Through analyzing, the maximun values of the seismic dynamic response coefficient is 1.6 under this condition.This situation appears only in the near-surface region.The seismic dynamic response coefficient is less than that in the other region.%对竖直向剪切波作用下边坡的动力响应进行数值模拟.记录边坡模型在整个动力响应过程中每个节点的位移、速度等物理量的最大值,并选用边坡底部的1个参考点的量值作为基准值来计算边坡的地震动力响应系数,在此基础上,绘制边坡的地震动力响应系数等值线图,比用本身存在放大现象的边坡脚点量值作为基准值更真实地反映力边坡的地震动力响应.研究结果表明:在竖直方向地震波作用下,边坡顶部和底部水平地表部分出现放大现象,边坡面近地表区域没有出现放大现象;该条件下边坡地震动力响应系数最大值为1.6,且放大现象主要出现在边坡近地表区域,边坡内部大部分区域地震动力响应系数小于l.