大跨度悬索桥施工过程中动力性能变化和抗风安全性研究

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1、西南交通大学硕士学位论文大跨度悬索桥施工过程中动力性能变化和抗风安全性研究姓名：张伟申请学位级别：硕士专业：桥梁与隧道工程指导教师：申爱国20080601AbstractIn20centuriestheearlypartofSO’S，OurcountryhasstartedtogetintoSuspensionBridgesconstruction’Sages．TheSuspensionBridge’Sbiggestacrosspathofrecordisbreakcontinuouslyveryquickly．Withincreasingspanlengthofsuspen

2、sionbridges，itcertainlywillcausesomenewproblems．Forexample，thedynamicperformanceofeachpartofstructure，andtheproblemofaerostaticsstabilityforSuspensionBridgesinwindload．AmongthemtheaerostaticswindloadisthekeyloadtotheControldesignofSuspensionBridges．Atthedesignstage，weareberequestedthatthewi

3、ndloadofthepartofSuspensionBridgesmustbeestimatedexactly．AfterintroducingtheSuspensionBridgesdynamicanalysismethodandthetheoriesagainstthewind，inthispaper，BytakingtheRunYangBridgeandtheXiHouMenSuspensionBridgeasexample，useMIDAS————thefiniteelementprocedure．Accordingtothedesignrequestandcons

4、tructioncharacteristicsoftheXiHouMenSuspensionBridge，establishconstructionprocessofcalculationmodel．Imitateconstructionprocessthespotprognosticatedata．MakeuseoffiniteelementmethodtocarryontheanalYsisofstructuremotivefunctionintheconstructionstageofSuspensionBridges．Atthemeantime，Hasconsider

5、edthemaincableandtheropetowerinteraction．Discoversthekeyfactorstoachievethegoaltoenhancethecriticalwindspeedandreducestheoscillationamplitude．Consideringtheinfluenceofwindloadintheconstructionstage，carryontheaerostaticsstabilityofsuspensionbridge’Sanalysisandcomparison，andmainparametersthat

6、affectaerostaticsstabilityofSuspensionBridgesarepointedout．Forexample，withtheinitialangleofattackincreases，theSuspensionBridges’aerostaticsstabilitywilldrop．Inthemeantime，givesomeimprovementandsuggestionforthedynamicperformanceofSuspensionBridges．AndProposesomemeasurestothedesignagainstthew

7、indandconstructionofSuspensionBridges．KeywordSuspensionBridge；constructionprocess；aerostaticsstability西南交通大学曲南父逋大字学位论文版权使用授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