具有初始几何缺陷的薄壁箱梁桥使用性能研究

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1、分类号型!!：!密级Ⅲ⋯⋯⋯⋯⋯ⅢIII

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3、⋯IIIlIlY1524968单位代码10618学号106270339墨瘀交通戈乎硕士学位论文论文题目：具有初始几何缺陷的薄壁箱梁桥使用性能研究Studyontheserviceabilityofthin-walledboxgriderbridgewithinitialflaw研究生姓名：王一导师姓名、职称：刘山洪博士、副教授申请学位门类专业名称：论文答辩同期学位授予单位工学结构工程答辩委员会主席：张亮亮评阅人；张亮亮2009年04月周水兴ABSTRACTWiththeincreasingofthebridgespan，thin—walled

4、boxgirderstructurehasbeenwidelyusedinmodembridgeengineerings．Therefore，theacademicresearchofitsstructurehasbecomemoreandmoredeeply．BasedontheShuituJialingRiverBridgeandcombinatedthemodeltest，thepaperfocusedontheperformanceofthethin—walledboxgirderbridgewhichhastheinitialgeometryflaw．Then，thepape

5、rcametotheconclusionofthattheinitialgeometryflawsinducethesignificantimpactontheperformanceofthebridge．Inthispaper，themainresearchworkcarriedoutthefollowingthreeaspects：1．Throughthetestdataanalysisofthree5msimplysupportedrectangularbeams(porecompletelyfilled，porepartlyfilledandporenone-filled)，t

6、hepapercametotheconclusionofthattheinitialgeometryflawofthecompactiondegreeCaninducethesignificantimpactofthedeflectionandstressofthestructure．Thatisthedeflectionoftheporenone—filled>thedeflectionoftheporepartlyfilled>thedeflectionoftheporecompletelyfilled．2．UsingtheANSYSsoftware，thepapersimulat

7、edthreeinitialgeometryflawswhicharethedegreeofthecompactiongrouting，thedifferentmaterialsofthecompactiongroutingandtheweakeningbytheprestressedchannels．Thepapermadethecomparativeanalysisofthebeamwhichisconsideredtheinitialgeometryflawsandthebeamwhichisnotconsideredinitialgeometryflaws．Thenthepap

8、ercomparedtheanalysisdataswiththetestdatas．Threetypesoftheinitialgeometryflawsallinducethesignificantimpactofthedeflectionandthestress．3．BasedontheShuituJialingRiverBridge，thepapersimulatedtwotypesoftheinitialgeometryflawswhicharetheprestresslossandinitialcrackscausedbytheporeblockage．Thenthepap

9、ermadeacomparisionwiththebridgeconsiderdtheflawsandthebridgenotconsiderdtheflaws．Inaddition，thepapersimulatedtheweakeningbytheprestresschannels．Theseflawsallinducethesignificantincreasingofthedeflectionandthestress．Thesethre