摘要
Previousconstitutivemodelsofgraniteshearcreephavetwolimitations:(1)althoughmoisturegreatlyaffectsgraniteshearcreepbehavior,currentlytherearenoconstitutivemodelsthatincludethisfactor;(2)therearealsonomodelsthatincludeanaccelerationstage.ThispaperpresentsanimprovedBurgersconstitutivemodelwiththeadditionofadamageparametertocharacterizethemoistureeffectandusesanonlinearrelationequationbetweenstressandstrainforinclusionastheaccelerationstage.Thedamageparameterisdeterminedfromgranitecreepexperimentunderfourdifferentmoisturecontents(0%,0.22%,0.49%,and0.79%).Thenonlinearrelationequationisobtainedbyfittingadatasetofstainversustimeunderfivedifferentloadingstages.Toverifythepresentedmodel,acreepexperimentwasconductedonothergranitesamplesandtheresultsshowthatthemodelagreeswellwiththeexperimentalobservationdata.
出版日期
2016年04月14日（中国期刊网平台首次上网日期，不代表论文的发表时间）
