Limit state analysis of rigid retaining structures against seismically induced passive failure in heterogeneous soils  

作　　者：Jianfeng Zhou Changbing Qin 

机构地区：[1]College of Civil Engineering,Huaqiao University,Xiamen,362021,China [2]School of Civil Engineering,Chongqing University,Chongqing,400045,China [3]Key Laboratory of New Technology for Construction of Cities in Mountain Area,Chongqing University,Chongqing,400045,China [4]National Joint Engineering Research Center of Geohazards Prevention in the Reservoir Areas,Chongqing University,Chongqing,400045,China

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2024年第3期1095-1105,共11页岩石力学与岩土工程学报（英文版）

基　　金：The research was financially supported by National Natural Science Foundation of China(Grant Nos.52108302 and 52009046);Fundamental Research Funds for the Central Universities of Hua-qiao University(Grant No.ZQN-914).

摘　　要：Soils are not necessarily uniform and may present linearly varied or layered characteristics,for example the backfilled soils behind rigid retaining walls.In the presence of large lateral thrust imposed by arch bridge,passive soil failure is possible.A reliable prediction of passive earth pressure for the design of such wall is challenging in complicated soil strata,when adopting the conventional limit analysis method.In order to overcome the challenge for generating a kinematically admissible velocity field and a statically allowable stress field,finite element method is incorporated into limit analysis,forming finiteelement upper-bound(FEUB)and finite-element lower-bound(FELB)methods.Pseudo-static,original and modified pseudo-dynamic approaches are adopted to represent seismic acceleration inputs.After generating feasible velocity and stress fields within discretized elements based on specific criteria,FEUB and FELB formulations of seismic passive earth pressure(coefficient K_(P))can be derived from work rate balance equation and stress equilibrium.Resorting to an interior point algorithm,optimal upper and lower bound solutions are obtained.The proposed FEUB and FELB procedures are well validated by limit equilibrium as well as lower-bound and kinematic analyses.Parametric studies are carried out to investigate the effects of influential factors on seismic K_(P).Notably,true solution of K_(P) is well estimated based on less than 5%difference between FEUB and FELB solutions under such complex scenarios.

关 键 词：Retaining wall Passive earth pressure EARTHQUAKES Finite-element limit-analysis methods 

分 类 号：TU43[建筑科学—岩土工程]