简介：Inthepast,thepseudo-staticmethodusedtobethemostcommonforevaluatingthestabilityoflandslidesunderseismicloads,inwhichstaticforcesactingonthecenterofgravityofaslidingbodyareusedtoconsidertheeffectsofearthquake.However,seismicloadsofrockandsoildifferfromtimeandlocationtotimeandlocation.Obviously,itisirrationalforthepseudo-staticapproachtobeappliedtosolvingdynamicproblems.Inthispaper,adisplacementpseudo-dynamicmodelisproposedtoassessseismicstabilityoflandslides,inwhichthesinusoidalcosinusoidalwaveisappliedtosimulatingearthquakedisplacement,andan'amplificationfactor'ofpeakseismicdisplacementisreferredtoastheamplificationofseismicwavewhenitpropagatesfromthebottomtothetopofthelandslide.Theeffectsofphysico-mechanicalbehaviorsofaslidingbodyonseismicstabilityofsoilslopesaretakenintoaccountaswellasinertiaforcesanddampingforces.Thesensitivityanalysesonthepermanentdisplacementandthedynamicfactorofsafetyoflandslidesarestudiedindetail.Moreover,alarge-scaleTangjiashanlandslidethatoccurredinWenchuanearthquakeisinvestigatedtoverifytherobustnessandprecisionofthepresentmethod.Itisfoundthattheresultsfromthepresentmethodisingoodagreementwiththosefromthepreviousmethod.