地震作用下折线型滑面斜坡的动力响应 “研究生论坛”稿件

折线型滑面斜坡是一种常见的滑坡类型,在地震作用下的动力响应非常复杂。为了研究地震作用下折线型滑面斜坡的动力响应,应用动力响应时程分析法,利用大型有限元软件ANSYS建立了数值模型。首先分析了模型在静力作用下的力学特性,然后对模型输入地震波,分析模型在动力作用下的动力响应。通过分析得到,斜坡在地震动力作用下出现了应力转移,节理上下两侧岩层发生错动,由于锁固段的存在,斜坡下部错动大于上部。研究斜坡属于后发型滑坡,地震作用虽未使斜坡发生破坏,但由于地震作用的累积效应,使斜坡的稳定性降低。

Dynamic Response of Slope with Broken Line Slip Surface

Slope with broken line slip surface is a common type of landslide,and the dynamic response under the action of earthquake is very complex.In order to study the dynamic response of slope with broken line slip surface under the action of earthquake,applying time history analysis method,the numerical model with ANSYS finite element software was established.The mechanical properties under static behavior was analyzed,then by inputting seismic waves to the model,the dynamic response under dynamic loading was analyzed.The results showed that stress-transfer occurred in the slope under earthquake action,rock bed dislocation occurred on both sides of the joint,and the dislocation of lower part was larger than upper part since the existence of lock-fixed section.Since the studied slope was a latecomer-landslide,earthquake action didn’t damage it,but the cumulative effect of the earthquake reduced its stability.