天津软土场地地震反应规律及其震陷的数值模拟分析-numerical simulation analysis of seismic response law and subsidence of tianjin soft soil site.docxVIP
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天津软土场地地震反应规律及其震陷的数值模拟分析-numerical simulation analysis of seismic response law and subsidence of tianjin soft soil site
theinfluencingfactorsofthephysicalcompositionandthicknessofsoftsoillayerthatistoaffecttheamplifiedeffect.(5)ThesomeonearchitectureengineeringsiteofdredgerfillwithinTianjinBinhaiNewAeraisastheresearchobject.Thissitebelongstosoftfoundationthatismainmadeupofpowderclayandsandlens.Itiswiththehighplasticityindex,highnaturalmoisturecontentandratioporosity,lownaturalunitweight,highcompressibilityandlowstrength.Accordingtheresultsofnumeroussimulatetheacceleration,velocityanddisplacementspectrumandamplifiedeffectofearthquakewavethroughthesilt,siltyclayandpowderclayofsoftsoilfoundationtoestablishthecalculatingmodelwhichusesthetrigonometricseriesmethodtosyntheticgroundof63%,10%,2%ofexceedingprobabilityin50yearswhichbasedonthatthreebedrockaccelerationduration.UsingtheFlac3Dsoftwaretoenterthesyntheticearthquakemotiontocalculatethesituationoftheseismicsubsidenceinthesoftsoilsite,extractingthemechanicalparameters,andpreliminaryrevealingthesiteofdredgerfillinitsmechanismoftheseismicsubsidence,andtheresultswillbecarriedcontrastanalysiswithYuShouSong’scalculationformulaofseismicsubsidencequantitywhichobtainedbythethreeaxletest,Meanwhileitofferspreliminaryevaluationtheseismicdepressionlevelofthesoftsoil.Keywords:Softsoilfoundation;Frequencycharacteristic;Amplifyingeffect;Nonlinearanalysisofsoildynamic;Trigonometricseriesmethod;Seismicsubsidence目录第一章绪论.................................................................11.1引言...................................................................................................................................11.2研究目的及意义...............................................................................................................21.3研究方法及国内外有关进展............................................................................................31.4本文的主要工作...............................................................................................................7第二章天津区域地震活动及软土工程地质特征概况................................................................92.1引言
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