基于斯宾塞法的边坡地震荷载可靠度分析

Seismic load based on spencer method of slope reliability analysis

针对边坡稳定性影响因素的不确定性,基于斯宾塞法,考虑多个参数对边坡稳定性影响的随机性,提出边坡稳定性可靠度分析的随机变量联合分布法。文中定义土体中内摩擦角φ、粘聚力c、容重γ为具有正态分布函数的随机变量以及水平地震系数kh为具有指数分布函数的随机变量,调用MATLAB中的正态分布函数和指数分布函数,构建地震条件下可靠度模型,分析各参数的敏感度对安全性系数的影响,其结果表明土坡中内摩擦角对边坡影响最大。

For slope stability influence factors of uncertainty,this article is based on spencer method,considering the effects of several parameters on the slope stability are random,reliability analysis of the slope stability is put forward method of joint distribution of random variables. Soil in this paper,we define the internal friction Angle,cohesive force,the bulk density for a normal distribution function of random variable and the coefficient of horizontal seismic with exponential distribution function of random variable,called the normal distribution function and exponential function in MATLAB to build under the condition of seismic reliability model,analysis the influence of the sensitivity of the parameters on the safety coefficient,the results show that the slope Angle of internal friction in the biggest influence on side slope.