梯形轨枕对轨道交通高架桥梁的减振作用分析

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1、北京交通大学硕士学位论文梯形轨枕对轨道交通高架桥梁的减振作用分析姓名：邹永伟申请学位级别：硕士专业：桥梁与隧道工程指导教师：夏禾20061201jb峦銮道厶鲎亟±堂僮论塞△垦SI墨△￡王ABSTRACTABSTRACT：Withtherapiddevelopmentofrailtransitsystem，theenvironmentalvibrationsinducedbyrunningtrainshavebroughttotheattentionsofpeople．ResearchersinChinaandabroadhavestudiedankindso

2、freductionm矗dsute8．FloatingladdertrackiSoneofthem．Firstly,inthispaper,thecurrentdevelopmentofcityrailtransitandtheresearchhistoryofenvironmentvibrationaresummarized．ThesbmctIlrccharacteristicsoffloatingladdertrackaleintroduced．Secondly,byestablishingallanalysismodeloftraill·bridgei

3、nteractionsystem，thedynamicresponsesofviaductbridgewithladdertrackandthedynamicresponsesofviaductbridgewithordinarynon-ballastedtrackalecalculated．Thentheladdertrack’seffectonreducingvibrationofviaductbridgeisanalyzed．Lastly,theladdertrackisstudiedbylaboratoryexperiment．拍echaracter

4、isticsoftheladdertrackarewellunderstoodthroughalaboratoryexperiment．Whendynamicloadisloadedonthetopoftheladdertrack,thevibrationtransmitsflomtherailtothetrackbaseandthevibrationintensityattenuatesclearlyinthecourseoftransmission．Theoreticalanalysisandexperimentprovesthatladdertrack

5、hasgoodvibrationreductioncharacteristic．Ascomparedtoordinarynon-ballastedtrack,laddertrack'svibrationreductioneffectismainlyembodiedinverticalaccelerationofbridge,whilethateffectonverticaldisplacementofbridgeisverysmall．Laddertrackhashardlyanyeffect011lateraldynamicresponseofbridge

6、anddynamicresponseoftrain．耽elfigherthetrainspeedis，themoreobvioustheladdertrack'svibrationreductioneffectis；thesmallerthematelasticityofladdertrackis．themoreobvionstheladdertrack’svibrationreductioneffectis．KEYWORDS：railtransit；viaductbridge；environmentalvibration；floatingladdertra

7、ck；train-bridgesystem；vibrationreductionmeasureCLASSN0：U448+13致谢本论文的工作是在我的导师夏禾教授的悉心指导下完成的。在两年半的研究生学习生活中，夏禾教授给予了无微不至的关怀。在整个论文选题，具体分析过程中，夏老师亲自指导，及时解决问题。夏老师严谨的治学态度、精益求精的工作精神、严于律己、宽于待人的优良作风都将影响我一生，使我受益匪浅，终生难忘，在此，谨向夏老师致以最衷心的感谢和崇高的敬意!日本铁道综研株式会社的齐琳老师提供了梯形轨枕相关的资料和数据，齐琳老师和蔼可亲，工作严谨，学术造诣颇深，感谢

8、齐老师对我的帮助和指导!北京交通大学土建学院的张楠副