循环荷载作用下粉土的破坏标准和动力特性的试验研究

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1、Y91172‘分类号!y8UDC鱼至主密级杰河浮夫萼硕士学位论文循环荷载作用下粉土的破坏标准及动力特性的试验研究赵慧指导教师姓名：金湘趋麴援湮渔太堂蚩±王猩硒壅压直塞直酉压监!昱申请学位级别：王堂亟±专业名称：随塞越塞王猩厘随控王程论文提交日期：2鲤§生4臼论文答辩日期：2Q竖生垒目22旦学位授予单位：盈连太堂学位授矛日期：2Q竖生§月答辩委员会主席：矗玉蝰论文评阅人：直玉蝰、奎圆维2006年4月中国南京ABSTRACTⅥ皿_11aIlDrovinceislocatedintheeaStofcollisionzorleofIndiatectoIIicplate

2、aIldEurasiaplate．Itisoneofmainseismiczonesinourcountry．Theseismicdesignintensit)rofY妇anprovinceisabove6degree．Thereis84percentofYhIltlanprovince’sa托awherctheseismicdesignintensityis7—9de掣ee．Inaddition，也ecauseoffo舯撕on，physicalandmechanical口mpertiesofYunnansiltisverydi丘brentfbmmesilti

3、nthe0therareas．Byusingtheconventionalitya11alysisrnctllodaIldtheenergyaJlalysismethod，thefailurecrjCerionaJldtlledyn锄icpropertiesofY岫ansiltarestIldiedbasedonlabomtorydyIl吼icmaxialtestsinthisdissenation．TheexperiIIlentalresultsshow也atYU皿aIlsiltwould1ique句onlyunderisotropicconsolidati

4、on．Thestateoflimitequilibfiumandthestatethattllestrainis5．O％，whjdhstatewillbereachedfirstisdeDendentontheconditionofcons01idation．If血econsolidationratiois1．Oor1．5，thestateoflimitequilibriumwouldbereachcdbeforethesⅡainreaches5．O％．Iftheconsolidationratiois2．O．mecasewouldreverse．Theres

5、earchonthe筋lurecriterion，thedyn锄jcshearstrengtllandthef苗lurestressconditionofYmansiltusingtheconventionalityanalysismemodindicatc：1)TheinjtialstaticStrcssconditionofYUmlansiltisoneoftllemostimportalltfhctorsmatafrectsitSdyn锄icshearstren酣h．，2)Whentheconsolidationratioismes锄e，theefrcc

6、toff醣lurecriteriononmedvn锄icshearstrengmwouldrcducewi也tllefailllretimeofvibrationincreasing．31Thef甜1urestressconditionsofY吡mansiltontllema)【inl啪cyclicshearsllrfhceassociatedwithmestainf缸1urecriterionandt11elimiteauilibriumfailurecriterionbothcaIlbeexpressedbythesamequadraticfomlllla

7、．Thedevel∞memsofstrainandporewaterpressureinY瑚ansiltduringtheprocessofvibrationha、忙beenstudied．Theresultsshowthelimjtporewaterpressurcisrelatedtotllei枷als诅ticstressconditionandmecyclicloadingintens咄111erelationshipoflimitpore、vaterpressure，avemges仃ess，deviators订ess枷oaIldcyclicaxials

8、n℃sscaIlbeexpressed