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ID:33819734
大小:12.15 MB
页数:76页
时间:2019-03-01
《地震与移动荷载共同作用下连续梁桥的振动问题分析》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、西南交通大学硕士研究生学位论文第
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3、页AbstractThispapermainlystudiestheresponseofcontinuousbeambridgeundercombinedseismicloadandmovingvehicleload.TheSixianjiaobridgeofGui-GuangRailwayistakenastheexampleforsimulation.Thefiniteelementmodeliscreatedbyusingthefiniteelementsoftwa
4、reANSYS.Inthispaper,thedynamicresponsesofinternalforcesanddisplacementofthebridgeunderthreecombinedloads,italsoprovidesaccurateandvaluabledataonsafetyindicators.Themaincontentsincludethefollowings.1.ThispapertakesthecontinuousbeamofSixianjiaobridgeofGui—Gu
5、angRailwayastheexample.ByusingthefiniteelementsoftwareANSYS,thefiniteelementmodeliscreated,andthedynamicresponsesofthemodelundergoingmovingloadisgoaen.Theinfluencingfactorsincludestrainspeedandtrainload.2.Considingthedifferentseismicloadcombination,thepape
6、rcarriesoutaseriesofnumericalsimulationsbyusingthefiniteelementmodelofthecontinuousbeamofSixianjiaobridgeofGui-GuangRailway.whatismore,theeffectofthepier’Sheightonthedynamicresponsesisalsodiscussed.3.Basedontheformerstudies,derailmentcoefficientandlateralf
7、orceareintroducedassafetyindicatorswhentrainisruning.InordertoCalTyoutacomprehensiveandsystematicstudyofthedynamicresponseofcontinuousbeambridge,eightdifferentworkingconditionsbasedonthedifferenceoftrain’Svelocitiesandseismicloadsaresimulated.Byusingthetra
8、nsientanalysismoduleprovidingbyANSYSsoftware,theeightdifferentworkingconditionsresultsofwhicharestudiedinordertoevaluatethesafetyofthetrainswhichisrunningontherailaresimulated.Keywords:continuousbeambridge;seismicloads;movingloads;dynamicresponse西南交通大学硕士研究
9、生学位论文第lll页目录第1章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11.1高速铁路概况及桥梁振动问题背景⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一11.2桥梁动力学研究领域⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯..21.3地震与列车荷载共同作用下桥梁振动问题研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯..21.4论文主要工作内容⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯..3第2章连续梁桥在移动列车荷载作用下的动力响应⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯..42.1移
10、动荷载作用下的连续梁动力响应⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.42.2连续梁振型函数的确定⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.62.2.1数值解法求解振型函数⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯..62.2.2利用连续梁支座的边界条件求解振型函数⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一62.3思贤窖大桥在移动列车荷载作用下的响应分析⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.72.3.1工程概况⋯⋯
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