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岩土力学 2010
边坡岩体软弱夹层剪切变形本构模型研究Keywords: weakintercalatedlayers,sheardeformation,constitutivemodel Abstract: themechanicscharacteristicexperimentsoftheweakintercalatedlayersinthesloperockmassarecarriedout.basingonthetestresults,thesheardeformationconstitutivemodelsarediscussed.thecommonconstitutivemodelsarehyperbolaandexponentmodels;butitcanbeindicatedthatthecalculationresultsfromthetwomodelsislessthantheactualresults.bystudyingthetwomodels,itisfoundthattheshearstiffnesscalculatedbythetwomodelsarethe2and1powersoftheshearstressrespectively;andwhicharethe1basicfunctionoftheshearstress;andcannotshowtherealconstitutivemodelsoftheweakintercalatedlayers.sothepowerfunctionmodeloftheks–τisbuilt;thedefinitionofthepowerfunctionisdecidedbythe‘n’,whichcanbegottenbyregressiveanalysis.atlast,thepowerfunctionmodelsunderdifferentnormalstresses.theresultsindicatethatthepowerfunctionsismoreclosetotheexperimentresults.itcanbesaidthatthepowerfunctionmodelusedtodescribethesheardeformationconstitutivemodelisreasonable.
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