大跨度多肋拱桥施工控制索力优化分析研究

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1、重庆交通大学硕士学位论文大跨度多肋拱桥施工控制索力优化分析研究姓名：刘邵平申请学位级别：硕士专业：结构工程指导教师：周水兴20090401ABSTRACTNon-bracketcable．．stayedsuspensionandcable．．stayedmethodiscommonconstructionmethodbeingusedtoinstallLong-spanarchbridges．Atpresent，therearemuchstudiesaboutcableforceandpre．camberofsegmentintheprocessofconstructionindoubl

2、e．ribarchbridgeindomestic．butthecalculatingmethodaboutcableforceandpre．．camberofsegmentinthestageofarchinstallationofmulti．ribbedsteeltrussarchbridgehasnotbeenstudiedYet．Basedonthethreeribssteeltrussarchbridgehasbeingconstructed--DaningRiverBridgeastheprojectbackground，isrelyingonThefocusofscient

3、ificresearchprojectsinTransportationCommitteeofChongqingcity‘‘thekeyconstructionanddesigntechnologystudiesinlong-spansteeltrussarchbridge”，andcarriesoutthestudyoncableforcecontrolledandoptimizationanalysisintheconstructionoflong．spanandmulti．ribarchbridge．themaincontentis：Firstly,basedoncableone．

4、0fjftensionmethod．theoptimizationmethodwillbeusedinthepre．camberandcableforceCalculation．andproposetheideathatwefirstlyentirelycalculatethecableandanchorforceandpre．camber,andthencalculatethecalculatet11ecableandanchorcableforceandpre．camberinsub．segment．Secondly,forthepastproblemthatarchriboflon

5、g—spanarchbridgeintheprocessofconstructioncontrolbecomeintothesaddle．shapedarchafteritisoutoftheroleofcable，thispaperintroducetheconceptofnegativepre-camber,andsolutetheproblemoftheshapeofsaddlebetter．Thirdly,itsetthesparialfiniteelementmodelthatmakethemainarch，tower．cableandanchorcableintointegr

6、ity，usethezero．orderoptimizationfunctionofANSYSandAPDLlanguage，anddrawupthespecialprocedureusedfortheconstructioncontrolofmulti．ribbedsteeltrussarchbridge．andthisprocedurecanautomaticallycarryoutcablethecalculationofcableandanchorforceanditerationoptimizationanalysisofpre．camber,withtheconstraint

7、conditionofgivenexpectationlinearwiththecablelosing．allowablevalueofdeviationoftowerandone．offtensionofcableandSOon．Forthly,thespecialproceduredrawnupforconstructioncontrolisappliedinconstructioncontrolofDaningRiverbri