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

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

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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 finite-element 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 Kp)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 KP.Notably,true solution of Kp is well estimated based on less than 5％difference between FEUB and FELB solutions under such complex scenarios.

Retaining wallPassive earth pressureEarthquakesFinite-element limit-analysis methods

Jianfeng Zhou、Changbing Qin

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College of Civil Engineering,Huaqiao University,Xiamen,362021,China

School of Civil Engineering,Chongqing University,Chongqing,400045,China

Key Laboratory of New Technology for Construction of Cities in Mountain Area,Chongqing University,Chongqing,400045,China

National Joint Engineering Research Center of Geohazards Prevention in the Reservoir Areas,Chongqing University,Chongqing,400045,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFundamental Research Funds for the Central Universities of Huaqiao University

5210830252009046ZQN-914

2024

10.1016/j.jrmge.2023.04.009

岩石力学与岩土工程学报(英文版)
中国科学院武汉岩土力学所中国岩石力学与工程学会武汉大学

岩石力学与岩土工程学报(英文版)

CSTPCD
影响因子：0.404
ISSN：1674-7755
年,卷(期)：2024.16(3)
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