不同可靠度方法在边坡稳定性分析中的对比研究  

A Contrastive Study of Different Reliability Methods in Slope Stability Analysis

作　　者：戚国庆 耿亚欣 QI Guoqing;GENG Yaxin(School of Civil Engineering,Shaoxing University,Shaoxing,Zhejiang 312000)

机构地区：[1]绍兴文理学院土木工程学院,浙江绍兴312000

出　　处：《绍兴文理学院学报》2022年第10期1-8,共8页Journal of Shaoxing University

基　　金：国家自然科学基金重点项目“强各向异性岩体开挖弱化机理与强度-刚度主动调控研究”(41831290).

摘　　要：在进行边坡稳定性分析时,边坡的稳定性常常受到土体参数变异性和随机性的影响.为了在最大程度上消除或者减少边坡稳定分析中的不确定性,更好地进行边坡稳定性评价,研究分析了起源于不确定性的工程结构可靠性理论,将可靠度理论运用在边坡稳定性分析中.用蒙特卡洛模拟法、响应面法和罗森布鲁斯法对某均质边坡进行可靠性分析,分别在随机变量符合正态分布和对数正态分布下对比研究三种可靠度方法之间的差异及不同分布下土体参数变异性对边坡可靠度的影响.使用不同可靠度方法计算边坡可靠度时,比较在同一种边坡安全状态功能函数下三种可靠度方法之间的差异;构建不同边坡安全状态功能函数时,比较在同一种可靠度方法下不同功能函数之间的差异.When performing a slope stability analysis,we find that the stability of a slope is often affected by the variability and randomness of soil parameters.In order to eliminate or reduce the uncertainty in the slope stability analysis to the greatest extent and better evaluate slope stability,the reliability theory of engineering structure originating from uncertainty was applied in the analysis of slope stability.The reliability analysis of a homogeneous slope was performed by Monte Carlo simulation method,response surface method and Rosenblueth method,and the differences between the three reliability methods and the influence of soil parameter variability on slope reliability under different distributions were compared under the random variables conforming to the normal distribution and the lognormal distribution,respectively.When different reliability methods were applied to calculate slope reliability,the differences between the three reliability methods under the same slope safety status function were compared;when different slope safety status function functions were constructed,the differences between different functional functions under the same reliability method were compared.

关 键 词：可靠性分析 蒙特卡洛法 响应面法 罗森布鲁斯法 

分 类 号：TU43[建筑科学—岩土工程]