《Stability of seismically loaded slopes using limit analysis.docx》由会员分享，可在线阅读，更多相关《Stability of seismically loaded slopes using limit analysis.docx（1页珍藏版）》请在课桌文档上搜索。
1、StabilityofSeismicallyloadedslopesusinglimitanalysiscoefficient,kc(theseismiccoefficientthatresultsinasafetyfactorFS1),canbecomputeddirectly,withouttheneedforaniterativeprocedure,bysolvingtheoverallequilibriumequationwithrespecttokc:kcXNiIcdxiseciWi?Uw,i?cdxitanicositan?sinitan?Wisini?RXNilWi(Rcosi?
2、heq,i)(10)whereWiistheweightoftheslice;Uw,iistheforceduetotheporewaterpressure(ifpresent)actingonthebaseofslicei;iistheinclinationoftheslicebasewithrespecttothehorizontal;dxiisthewidthoftheslice;Ristheradiusoftheslipcircle;heq,iistheheightofthecentreofgravityofeachslicemeasuredfromthebaseoftheslice;
3、cisthecohesionand?isthefrictionangleofthesoi1;andNisthetotalnumberofslices.UnlikeBishopssinplifiedmethod,theSpencer(1978)methodsatisfiesbothforceequilibriumandmomentequi1i-brium.Inordertomaketheproblemdeterminate,thismethodassumesthattheangleofinclination,1.Softheintersliceforceswithrespecttothehori
4、zontalplaneisknown.Inthepresentstudy,theintersliceforcesaresettobeparalleltoeachothertosimplifythemathematicalformalationofSpencersmethodandreducethecomputationeffort.AdifferentdistributionoftheinclinationofIntersliceforcesmayhelptoobtainamorereasonablelineofthrustandavoidte11siIeintersliceforces,butSpencer(1967)showedthattheuseofthesame1.Sforeveryslicepsimplifiedmethod01270426Sarmasmethod01290430Thisstudy.Spencer(1978).4721.OUKIDIS,BANDINIANDS1.GDO
