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针对地震作用下边坡稳定分析方法之间的差异及其适用情况尚不明确的问题,以某三级均质土坡为例,基于Quake/w、Geo-Studio、PLAXIS以及FLAC等软件,利用拟静力法、Newmark滑块分析法、动力有限元时程分析法、动力有限元强度折减法及有限差分强度折减法计算出安全系数,对比了5种方法的异同。结果表明,采用拟静力法获得的边坡抗震稳定性偏于安全;Newmark滑块分析法、动力有限元时程分析法计算的安全系数基本相同;动力有限元与有限差分强度折减法计算所得的安全系数相近,但在不同折减系数下计算的监测点位移相差较大。
In view of the difference between the methods of slope stability analysis under seismic load and the uncertain application of the method, a three-level homogeneous slope is taken as an example. Based on Quake / w, Geo-Studio, PLAXIS and FLAC software, Static method, Newmark slider analysis method, dynamic finite element method, dynamic finite element strength reduction method and finite difference strength reduction method to calculate the safety factor, and compare the similarities and differences between the five methods. The results show that the seismic stability of slopes obtained by quasi-static method is biased to safety. The safety factor calculated by the Newmark slider analysis method and the dynamic finite element time-history analysis method are basically the same. The dynamic finite element method and finite difference method Of the safety factor is similar, but under different reduction factor calculation of the monitoring point displacement difference.