简支转连续梁桥二次预应力张拉研究

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1、华中科技大学硕士学位论文简支转连续梁桥二次预应力张拉研究姓名：游峰申请学位级别：硕士专业：建筑与土木工程指导教师：朱宏平20061104华中科技大学硕士学位论文AbstractWiththedevelopmentofscienceandtechnologyandcommunication，duetotheirconvenientconstruction，economicalcost，reasonableforcecharacterandcomfortabledriving，pre-stressedcontinuousbeambrid

2、gehavemadearapidprogressinrecentyears，andbecomeoneofthemostcompetitivebridgetypes．Amongtheseveralkindsofregularconstructionmethodsofbeambridge，themethodofthesimplysupported·continuousconstructionisakindofeffectiveandeconomicalone，comparedwiththepre-stressedcontinuousbe

3、ambridge，itscostismuchlower，anditisakindofmoreexcellentconstructionmethods．Itovercomesthefractureofthejointonlywiththeordinarysteel，andthenon—harmonyissueofthestrainandstressbetweenthestructuresunderdifferentforce．Italsostrengthensthestressstoreofthejointbetweenthebeam

4、s，andassuresthecontinuousandwholecapabilityofthebridge．Inordertoguaranteeenoughstressstore，goodcontinuityandcontinuum，thepre—stressedtensileforcebetweenthebeamsbecomesamoreimportantsubject．Onthebasisofstudyingandsummarizingformerresearchwork,thistextcarriesondeepanalys

5、isandresearchtothepre-stressedtensioninthecourseofthetransitionofthesystem．Thetextreviewsthecurrentsituationoftheresearchanddiscussesthecharacterofthepre—stressedsimplysupported—continuousbridge，thenthetextanalysestherationalityoftheforceandputsforwardthetopicofresearc

6、h，thatistosay，inthecourseofthetransitionofthesystem，therationalconfigurationofthepre—stressedtensileparameterwillexertanimportantinfluencetotheconstructedbridge．Inthecourseofthetransitionofthesystem，thetextdoestheoreticalanalysisonthecalculationofthedisplacementandthef

7、orce．Combinedwiththeprojectpracticeofsomebridge，thetextmakesthefiniteelementanalysisontheeverystageoftheconstructioninthecourseofthetransitionofthesystem，throughthesimulatedcalculation，thetextdrawssomepracticalconclusions．Atthesametime，throughchangingthethreeprimarypar

8、ameterofthepre-stressedtension：length，quantity,andthetensilecontrolstress，thetextgetsthedifferentassociationsofthepar