Comparative Study on Response Surfaces for Reliability Analysis of Spatially Variable Soil Slope  

作　　者：李亮 褚雪松 

机构地区：[1]School of Civil Engineering,Qingdao Technological University

出　　处：《China Ocean Engineering》2015年第1期81-90,共10页中国海洋工程（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Grant Nos.51274126 and 51008167);China Scholarship Council(CSC);the Open Foundation of State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology(Grant No.LP12014)

摘　　要：This paper focuses on the performance of the second-order polynomial-based response surfaces on the reliability of spatially variable soil slope. A single response surface constructed to approximate the slope system failure performance function G（X） （called single RS） and multiple response surfaces constructed on finite number of slip surfaces （called multiple RS） are developed, respectively. Single RS and multiple RS are applied to evaluate the system failure probability pf for a cohesive soil slope together with Monte Carlo simulation （MCS）. It is found thatpe calculated by single RS deviates significantly from that obtained by searching a large number of potential slip surfaces, and this deviation becomes insignificant with the decrease of the number of random variables or the increase of the scale of fluctuation. In other words, single RS cannot approximate G（X） with reasonable accuracy. The value of pc from multiple response surfaces fits well with that obtained by searching a large number of potential slip surfaces. That is, multiple RS can estimate G（X） with reasonable accuracy.This paper focuses on the performance of the second-order polynomial-based response surfaces on the reliability of spatially variable soil slope. A single response surface constructed to approximate the slope system failure performance function G（X） （called single RS） and multiple response surfaces constructed on finite number of slip surfaces （called multiple RS） are developed, respectively. Single RS and multiple RS are applied to evaluate the system failure probability pf for a cohesive soil slope together with Monte Carlo simulation （MCS）. It is found thatpe calculated by single RS deviates significantly from that obtained by searching a large number of potential slip surfaces, and this deviation becomes insignificant with the decrease of the number of random variables or the increase of the scale of fluctuation. In other words, single RS cannot approximate G（X） with reasonable accuracy. The value of pc from multiple response surfaces fits well with that obtained by searching a large number of potential slip surfaces. That is, multiple RS can estimate G（X） with reasonable accuracy.

关 键 词：probabilistic slope stability analysis response surface method Monte Carlo simulation 

分 类 号：TU43[建筑科学—岩土工程]