摘要
地震荷载是触发边坡失稳的重要原因之一。基于有限差分软件FLAC^(3D)对某高陡边坡进行了动力分析,结果表明:在地震作用下,高陡边坡将发生较大的永久位移,最大永久位移主要集中在坡面和坡顶附近;剪应力集中在坡角,沿坡角向坡体内呈弧线形发展,与静力作用下的破坏模式相仿;随着高程的增加,位移时程和加速度时程都呈现出"放大"效应。
Seismic load is one of the important reasons to trigger slope instability.In this paper,based upon finite difference software FLAC^3D,dynamic analysis were carried out to certain high steep side slope,results show：under earthquake,the high steep slope may have relatively large permanent displacement,which concentrate mostly in slope face and slope top;The shear stress concentrates at slope tip and develops with arc shape from slope tip to inside of slope.It is similar with damage model under static force.With the increase of elevation,the displacement time course and acceleration time course represent ＂amplifying＂ effect.
出处
《公路交通技术》
2017年第4期8-10,15,共4页
Technology of Highway and Transport
