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时间:2020-03-25
《桥上无缝道岔纵向力计算理论与试验研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第32卷第4期铁道学报Vo1.32No.42010年8月JOURNALOFTHECHINARAILWAYSOCIETYAugust2010文章编号:10018360(2010)040134—07桥上无缝道岔纵向力计算理论与试验研究'杨荣山,刘学毅,王--T-(西南交通大学土木工程学院,四川成都610031)摘要:根据桥上无缝道岔受力和变形特点,建立道岔一桥梁一墩台一体化计算模型,并利用有限元法对模型求解。以浙赣线湄池1号大桥为例,分析桥上无缝道岔的受力与变形的特性,测试桥上无缝道岔的温度力和位移。试验结果表明,理论计算结果和实测数据相吻合。理论分析和实验研究表明:所建立的道岔一桥梁一
2、墩台一体化模型用于计算桥上无缝道岔纵向力和位移是合理可行的;桥上无缝道岔与桥上无缝线路的受力和变形差别很大,在计算桥上无缝道岔时应考虑实际的钢轨温度变化幅度、道岔布置方式和岔、桥相对位置。在道岔布置密集的区域,如车站咽喉区,道岔间的相互影响较大,为准确计算道岔及桥梁的受力和位移,应建立包括所有道岔和桥梁的整体模型。关键词:桥上无缝道岔;纵向力;有限元法;试验研究中图分类号:U213文献标志码:Adoi:10.3969/j.issn.1001—8360.2010.04.025ResearchonLongitudinalForceComputationTheoryandExperimen
3、tofWeldedTurnoutonBridgeYANGRong—shan,LIUXue—yi,WANGPing(SchoolofCivilEngineering,SouthwestJiaotongUniversity,Chengdu610031,China)Abstract:Accordingtothestress—deformationcharacteristicsofweldedturnoutsonabridge,theintegratedturnout—bridge~abutmentcomputationmodelwasestablished;themodelwassolve
4、dbythefiniteelementmeth—od.TakingtheMeichiNo.1BridgeoftheZhejiangandJiangxiRailwayasanexample.thestress—deformationcharacteristicsoftheweldedturnoutsontheBridgewereanalyzedandthetemperatureforceanddisplacementoftheweldedturnoutsontheBridgeweremeasured.Thetheoreticalanalysisandsitetestsproveasfo
5、llows:Thecalculatedresultsareconsistentwiththesitemeasurements;theintegratedturnout—bridge—abutmentcorn—putationmodelisfeasibletocalculatethelongitudinalforceanddisplacementofweldedturnoutsonabridge;thestressesanddeformationsofweldedturnoutsonabridgeandthoseofCWRonabridgedifferagreatdeal;whenca
6、lculatingweldedturnoutsonabridge,theactualchangingmagnitudeofrailtemperatures,theturnoutlayoutandtherelativepositionofturnoutandbridgeshouldbetakenintoconsideration;theinteractionbe—tweenturnoutsisconsiderableinareaswithdenselyarrangedturnouts,suchasthethroatzoneatastation,SOtheintegratedcomput
7、ationmodelincludingalltheturnoutsandbridgesshouldbeestablished,SOastocalculatethestressesanddisplacementsoftheturnoutsandthebridgeaccurately.Keywords:theweldedturnoutonabridge;longitudinalforce;finiteelementtheory;sitetest道岔是轨道的薄弱
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