轻轨列车通过高架桥梁引起的周围土体振动研究

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1、西南交通大学硕士学位论文轻轨列车通过高架桥梁引起的周围土体振动研究姓名：宋子威申请学位级别：硕士专业：桥梁与隧道工程指导教师：李小珍20080801西南交通大学硕士研究生学位论文第1I页ABSTRACTTherailtraffic，duetoitsconvenience，capacity,speedandsafety,iSbecomingaprimarychoicetOeasetheheavycitytraffic．However，vibrationsofsurroundinggroundandbuildingsasinducedbytherunn

2、ingtraiashaveastrongimpactonpeople’Shealth，living＆workingenvironment，thesafetyofbuildingstructureandthenormalperformanceofpreciseinstrument．whicharouseresearchers’attentiongreatlybothhomeandabroad．Theattenuationinthisthesisissystematicallyanalyzedofambientvibrationscausedbyli曲

3、t—railtrainswhenpassingviaduct．Firstly,onthebasisofformerresearchwork，thedevelopingstatus，researchmethodsandcurrentachievementsforthisresearchsubjectarebrieflyintroduced．Andmoreover,domesticandoverseacalculatingmodels，parameterselection，evaluationcriterionetcforsurroundingsoil

4、’Svibrationsasinducedbylight．railtraffiCarecomparedseparately．BasedonabovethemodelisfurtherdividedintOtWOsub．modelsasvehicle—bridgemodelandpier-soilmodel．whichemphaticallyanalyzestheimpactofartificialboundaryselection．vehiclespeed，andmutualeffectofsoil．structureontheresult．For

5、vehicle—bridgemodel．10adseriesmodelisusedtobuilditsdynamicexluationandsolvingbyiterativemethod．Forpier-soilmodel．threeimportantqueriesarediscussedas：foundationsoilmodel。mutualeffectofstructure—soilandartificialboundary．Attheendofthearticle，takingtenexpanding30msimplesupportbea

6、minWuhanlight—railengineeringforexample．firstavehicle—bridgedynamicanalysismodeliSconstructedbasedonmoving10adseriespassingbridgetocalculatethereactionhistoryofpiersupport．Then，athree．dimensionalfiniteelementmodelfordynamicanalysisofpier-soilisestablishedunderthreeartificialbo

7、undaryconditions．DynamicresponsesofgroundunderelasticstateiScalculatedbyapplyingthelargegeneralsoftwareANSYS．Theattenuationofdisplacement．speedandvibrationlevelarehighlightdiscussedwithsomesignificantconclusions．Vianumericalcalculation，thedisplacementandaccelerationvaluesrebou

8、ndatcertaindistance，whichistheSalTleasthe西南交通大学硕士研究生学位论文第1lI页