梁端无砟轨道扣件系统受力研究

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1、西南交通大学硕士学位论文梁端无砟轨道扣件系统受力研究姓名：申磊申请学位级别：硕士专业：道路与铁道工程指导教师：刘学毅20080601西南交通大学硕士研究生学位论文第1I页I__ll__I__l___llIIl___--I__l_l__●I-I-_I-_-_--I-●__l_l___II_--I●-l-_●I_I-●_I●l●_●l●-一I●_●_●l●一AbstractAslayingballastlesstrackonbridge，thedistortionofbridgewouldhaveasignificantinfl

2、uenceonballastlesstrackstructure．Whenbeam-enddistortionofbridgearises，partialupliftsofbeam—endrail，thatproducesadditionalupliftforcesordownforceswithinacertainscopeofbothsidesofthebeamjoints，Canbecaused。Startingfromthebeam．enddisplacementinfluenceonballastlesstrack

3、，thispapermainlyanalyzesstressinginfluencesonfastenersystemofballastlesstrackbybeam—endrotationangle，staggeredplatformandtrainload，andalsoproposesthecorrespondingstructureimprovingmeasures．Firstly,basedonthecharacteristicsofbeam-enddisplacement，thepaperestablishesc

4、alculatingmodalofbeam—enddisplacementinfluenceonfastenersystemstressingofballastlesstrack，usesfiniteelementmethodtodiscretemodalandperformscalculationandanalysisbyusingANSYSsoftware．Secondly,accordingtodifferentbeam-endrotationangles，staggeredplatforms，trainloads，f

5、astenerdesignparametersandbeam—endbracketlengths，thepaperperformscalculationandanalysisofbeam·endfastenersystemstressinganddisplacementcharacteristicsofballastlesstrack．Theresultshowsthatbeam-endrotationangle，staggeredplatformandstiffnessoffastenerhaveanobviousinfl

6、uenceonthestressingoffastenersystem．Finally,toreducebeam．enddisplacementinfluenceonfastenersystem’Sstressingofballastlesstrack，thepaperproposesthestructuralmeasureofintroducingtransitiontracktobeam—endofbridge．Byestablishingcontrastmodaloffastenersystem，thepapercal

7、culatesthestressoffastenersystematdifferentconditionswhichiSwithorwithouttransitiontrack．TheresultshowsthatthestressoffastenersystemCanbeeffectivelyreducedbysettingtransitiontrackatbeam-endKeyWords：ballastlesstrackbridgedistortionfastenersystem西南交通大学曲南父逋大罕学位论文版权使用授

8、权书本学位论文作者完全了解学校有关保留、使用学位论文的规定，同意学校保留并向国家有关部门或机构送交论文的复印件和电子版，允许论文被查阅和借阅。本人授权西南交通大学可以将本论文的全部或部分内容编入有关数据库进行检索，可以采用影印、缩印或扫描等复印手段保存和汇编本学位论文。本学位论文属于1．保