時(shí)間效應(yīng)對(duì)土體小應(yīng)變動(dòng)力特性影響及其細(xì)觀機(jī)理研究.pdf

1、浙江大學(xué)碩士學(xué)位論文時(shí)間效應(yīng)對(duì)土體小應(yīng)變動(dòng)力特性影響及其細(xì)觀機(jī)理研究姓名：陳光仔申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：巖土工程指導(dǎo)教師：蔡袁強(qiáng)20130310浙江大學(xué)碩士學(xué)位論文AbstractSoildynamicshearmodulusanddampingratioarcthemostimportantdynamiccharacteristicparameters，areindispensabledynamicparameterstOthesoi

2、landfoundationseismicresponseanalysis，andalsotheessentialcontentinthesiteseismicsafetyevaluationFourteentestsofFujianstandardsandunderdifferentconditionsusingBritishGDSresonantcolumn(RCA)systemwasconductedwiththeaimofres

3、earchingtheagingeffectsonsmall—strainshearmodulusanddampingratioofsandsandgiveexplanationsforthetestresultsbasedongrainslipandcontactforcehomogenizationtheoryofgranularmaterialsTheexperimentalresultsshow廿lat，withinacerta

4、inconfiningpressure，smallstrainshearmodulusgrad砌lyincreaseswithtimeand，thedampingratiodecreasegraduallywithtimeAtthesametime，theresearchfoundsthattherelgivedensitystresshistoryandfmescontentssignificantlyeffecttheagingof

5、sandUndertheconfmingpressureof35kPatimeeffectsofloosesandisgreaterthandensesandhowever，whentheconfmingpressureincreaseto150kPatimeeffectsofloosesandislessthandensesandStresshistoryisoneoftheimportantfactorsaffectingtimee

6、ffectsofsand：unloadingreloadingcyclesandoverconsolidationbothCanreducethegrowthrateofsmallstraindynamicshearmodulusofsandAgingrateofsandwillbeincreasedifdrykaolinepowderwasaddedtosamplesKeywords：Resonantcolumntest；Sand；A