Effects of soil spatial variability on structural reliability assessment in excavations  

作　　者：Zhe Luo Honggui Di Mehrad Kamalzare Yixiang Li 

机构地区：[1]Department of Civil Engineering,University of Akron,Akron,OH 44325,USA [2]The Key Laboratory of Road and Traffic Engineering,Ministry of Education,Tongji University,Shanghai 201804,China [3]Department of Civil Engineering,California State Polytechnic University,Pomona,CA 91768,USA

出　　处：《Underground Space》2020年第1期71-83,共13页地下空间（英文）

基　　金：The second author would like to thank the support received from the National Natural Science Foundation of China through Grant No.51808405.

摘　　要：In this study,the effects of soil spatial variability in braced excavations are investigated by focusing on three structural responses:wall bending moments,wall shear forces,and strut forces.The soil spatial variability is modeled using random field theory,and the generated soil parameters are mapped onto a finite element model.A procedure for automating the Monte Carlo simulation,which is used for probabilistic analysis,is described.A case study demonstrates that the soil spatial variability has a considerable effect on the excavation-induced structural responses.Furthermore,a reliability analysis is performed to estimate the failure probability for three structural failure modes.The results demonstrate the importance of considering soil spatial variability in the structural assessment of braced excavati ons.

关 键 词：Braced excavations Soil spatial variability Random field modeling Finite element method 

分 类 号：TU43[建筑科学—岩土工程]