基于人工蜂群算法的边坡地震可靠度分析

Seismic reliability analysis of slope stability based on artificial bee colony algorithm

通过输入埃而森特罗波(EL Centro)地震波对边坡进行有限元瞬态分析,得到边坡在各个时刻的应力值.然后利用Mohr-Coulomb破坏准则,得到对应某一起始点的滑动面.并用瑞典条分法计算边坡安全系数的公式,使其作为目标函数,经过人工蜂群算法进行优化得到起始点,从而确定了滑动面并计算出边坡安全系数.最后,对各个时刻的边坡安全系数进行统计分析,得到边坡失效概率.

Using EL Centro seismic wave and transient analysis to simulate the slope stability, the stress state of slope at every moment can be obtained. And then Mohr-Coulomb failure criterion is used to determine the slip surface that corresponds to an initial point. Based on Sweden method of slices, the formula of the slope safety factor can be used as an objective function to search the initial point. This search process can be optimized by the artificial bee colony algorithm, which can find out the point, determine the slip surface and compute the safety factor. Finally, the statistic analysis of slope safety factors at every moment can be performed to calculate the failure probability of a slope.