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  • 简介:Inearthquakeproneareas,understandingoftheseismicpassiveearthresistanceisveryimportantforthedesignofdifferentgeotechnicalearthretainingstructures.Inthisstudy,thelimitequilibriummethodisusedforestimationofcriticalseismicpassiveearthresistanceforaninclinedwallsupportinghorizontalcohesionlessbackfill.Acompositefailuresurfaceisconsideredinthepresentanalysis.Seismicforcesarecomputedassumingthebackfillsoilasaviscoelasticmaterialoverlyingarigidstratumandtherigidstratumissubjectedtoaharmonicshaking.Thepresentmethodsatisfiestheboundaryconditions.Theamplificationofaccelerationdependsonthepropertiesofthebackfillsoilandonthecharacteristicsoftheinputmotion.Theaccelerationdistributionalongthedepthofthebackfillisfoundtobenonlinearinnature.Thepresentstudyshowsthatthehorizontalandverticalaccelerationdistributioninthebackfillsoilisnotalwaysin-phaseforthecriticalvalueoftheseismicpassiveearthpressurecoefficient.Theeffectofdifferentparametersontheseismicpassiveearthpressureisstudiedindetail.Acomparisonofthepresentmethodwithothertheoriesisalsopresented,whichshowsthemeritsofthepresentstudy.

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