地震力对边坡可靠度的影响

Effect of Seismic Force on Slope Reliability

地震动作用是影响边坡可靠度分析的重要因素。利用Karhunen-Loève(K-L)展开方法生成土体黏聚力的随机场,采用简化Bishop法计算不同地震力作用下的边坡安全系数,通过Monte Carlo模拟计算地震动作用下边坡的失效概率,分析地震力对边坡稳定性的影响规律。研究结果表明:地震力对边坡稳定性有很大影响。随着水平拟静力系数K_(h)增大,安全系数F_(s)逐渐减小,失效概率P_(F)逐渐增大;地震动作用下,边坡的失效概率随黏聚力变异系数和相关长度的增大而增大。

Seismic is an important factor affecting the reliability analysis of slopes.In order to analyze the influence of seismic force on slope stability.The Karhunen-Loève(K-L)method was used to generate the random field.The simplified Bishop method was used to calculate the slope safety factor under the action of different levels of seismic force.The failure probability was calculated by the Monte Carlo method.The results show that seismic force has a great influence on slope stability.As the Horizontal quasi-static coefficient K_(h)increases,the safety factor F_(s)gradually decreases,and the probability of failure P_(F)gradually increases.Under the action of seismic vibration,the failure probability of the slope increases with the increase of the coefficient of variation of the correlated length.