Effect of 2D spatial variability on slope reliability: A simplified FORM analysis  

作　　者：Jian Ji Chunshun Zhang Yufeng Gao Jayantha Kodikara 

机构地区：[1]Key Lab of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University [2]Department of Civil Engineering, Monash University

出　　处：《Geoscience Frontiers》2018年第6期1631-1638,共8页地学前缘（英文版）

基　　金：Financial supports from National Science Foundation of China(Grant Nos.51609072,51879091,51479050 and 41630638);the National Key Basic Research Program of China("973" Program)(Grant No.2015CB057901);the Public Service Sector R&D Project of Ministry of Water Resource of China(Grant No.201501035-03)

摘　　要：To meet the high demand for reliability based design of slopes, we present in this paper a simplified HLRF(Hasofere Linde Rackwitze Fiessler) iterative algorithm for first-order reliability method(FORM). It is simply formulated in x-space and requires neither transformation of correlated random variables nor optimization tools. The solution can be easily improved by iteratively adjusting the step length. The algorithm is particularly useful to practicing engineers for geotechnical reliability analysis where standalone(deterministic) numerical packages are used. Based on the proposed algorithm and through direct perturbation analysis of random variables, we conducted a case study of earth slope reliability with complete consideration of soil uncertainty and spatial variability.To meet the high demand for reliability based design of slopes, we present in this paper a simplified HLRF(Hasofere Linde Rackwitze Fiessler) iterative algorithm for first-order reliability method(FORM). It is simply formulated in x-space and requires neither transformation of correlated random variables nor optimization tools. The solution can be easily improved by iteratively adjusting the step length. The algorithm is particularly useful to practicing engineers for geotechnical reliability analysis where standalone(deterministic) numerical packages are used. Based on the proposed algorithm and through direct perturbation analysis of random variables, we conducted a case study of earth slope reliability with complete consideration of soil uncertainty and spatial variability.

关 键 词：SLOPE stability Spatial VARIABILITY RANDOM field model PROBABILITY of failure HLRF algorithm FIRST-ORDER reliability method(FORM) 

分 类 号：P[天文地球]