1、同濟(jì)大學(xué)博士學(xué)位論文列車振動(dòng)荷載作用下上下近距離地鐵區(qū)間交疊隧道的動(dòng)力響應(yīng)分析姓名：張璞申請(qǐng)學(xué)位級(jí)別：博士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：孫鈞2001.8.1ABSTRA(：TBasedonthecrisscrossandoverlappingtunnelsbetweenNanpuBridgestationandPtldongSouthRoadstationofShanghairailtrafficpearfrout，thedynamicres

2、ponseofcrIsscrossandoverlappingtunnelsduetothetrainribrationisstudiedinthispaperThecontentsincludetwoparts：oneisthestudyofthetrainvibrationincludingtilecatIseoftrainloadthetestinganddeterministicanalysisoffieldtrackvibl‘

3、ationaccelerationandthesimulationoftrainvibrationload；theotheristheanalysisofdynamicresponseofsoil—tunnelduetothetrainvibrationloadbytwodimensionalFEMandthree—dimensionalFEMcalculationandanalysisAccordingtothecharacteris

4、ticoftrainvibration10adthecauseoftrainvibrationloadisanalyzedconsideringtileinfluenceofwheelandtrackThestochasticnonsnloothoftrackjsclassifiedThediscretesamplingvalueoffieldtrackvibrationaccelerationwaveistransformedbyFF

5、TandanalyzedbydeterministicanalysisOnedegreeoffreedomsimplifiedmodeljsusedfortrainandthekinematicequilibriumdifferentiaIequationisconstructedtosimulatetheverticalwheelsystemAndthegenel’alsolutionoftheequilibriumdifierent

6、ialequationisderivedAccordingtotheprincipleofD’AtemberttheexpressionoftheverticaltrainvibrationloadisderivedThewellknownsoftwareANSYSjsadoptedinthispaperTwo—dimensionaelastoplasticdynamicFEMcalculationmainlystudiesthesec

7、tionswhosespaceisneatestTheclearspaceisl987melastoplasticDPmodelisusedtosimulatethesoilItisclarifiedthatartificialdampingtransmissionboundaryshouldbeusedbycomparingthedynamicresponseoftunnelunderthetwokindsofboundaryfixe

8、dboundaryanddampingboundary1tisconcludedthatjtisnecessarytoconsidertheinitiaIstressfieldinthecalculationbycomparingthestaticcalculationresultsbetweenconsideringinitialstressandnotconsideringThefundamentalfrequencyisobtai

9、nedaccordingtothemodalanalysisofthesoil—tunnelsystemBasedontileaboveanalysisthedynamicresponseoftunnelisstudiedunderthreeIoadsituationsup—dynamicloaddowndynamic10adandup&down—dynamic10adThedynamicresponseofsoil—tunnelsys

10、temwithditierentdampingratiosisstudiedBesidesthedynanficresponseofsoil—tutmelsystemisstudiedafterthesotlbetweenthetunnelsisreinforcedTheconclusioncanbeappliedtolhedesignandconstructionThree—dimensionalelasticdynamicFEMca

11、lculationmainlystudiestheovel‘lap—intersectantsectionandtheintersectant—parallelsectionThree—dimensionalFEMmodelisconstructedtostudythedynamicresponseoftunnelunderthreeloadsituations：up—dynamicload、down—dynamic10adandup&

12、downdynamic10adTherelationbetweendynamicinteractionoftwotunnelsandthespaceincreasingoftwotonnelsisstudiedSomeusefuICOIlclusionsareobtainedKeywords：ovel’laptunneltrainvibrationFFTdampingboundaryinitialstressmodalanalysisd