A moment method for reliability analysis of soil slope stability#br#
based on layered discrete random field#br#
CHEN Zhaohui1，2，LI Huanyu1，3，FAN Wenliang1，2
(1. School of Civil Engineering，Chongqing University，Chongqing 400045，China；2. Key Library of New Technology for Construction of Cities in Mountain Area，Ministry of Education，Chongqing University，Chongqing 400045，China；
3. Chongqing Branch of Beijing Institute of Architectural Design，Chongqing 401120，China)
Abstract：In order to overcome the difficulties such as the spatial variability of correlated multi-parameters and the implicity of limit state equations in the reliability analysis of soil slope stability，a moment method based on the layered discrete random field of soil parameters was presented. According to the local average process theory and the vertical variation of soil parameters，a layered discrete random field model of soil parameters was proposed，in which the soil parameters within each soil layer are regarded as random variables and the spatial variability of the soil parameters in adjacent layers is described by variance functions. The reliability function of soil slope stability was simplified as a reduced-dimension function of soil parameters，and the reliability of the slope stability was calculated by the four-order moment method. Comparisons among the proposed method，MCS and the multi-random response surface method using slope examples were performed and a good agreement among them was illustrated.
陈朝晖1，2，李环禹1，3，范文亮1，2. 二维土质边坡稳定可靠性分析分层离散随机场矩方法[J]. 岩石力学与工程学报, 2019, 38(2): 424-432.
CHEN Zhaohui1，2，LI Huanyu1，3，FAN Wenliang1，2. A moment method for reliability analysis of soil slope stability#br#
based on layered discrete random field#br#. , 2019, 38(2): 424-432.
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2019, Vol. 38 
