张拉顺序对无粘结预应力多层框架的影响

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1、西南交通大学硕士学位论文张拉顺序对无粘结预应力多层框架的影响姓名：吴磊申请学位级别：硕士专业：结构工程指导教师：吴培明20080501西南交通大学硕士研究生学位论文第lI页AbstractPrestressedconcertwithunbondedtendons(BUPC)isanewlyarisentechniqueintheconcretestructurerealnLComparedwithprestressedconcreterwithbondedtendons，itabridgespreformedhole，driftingsteel，groutingcraftetc，them

2、ethodoflayingsteelsismoreagile：Comparedwithreinforcedconcrete，itstrengthenstheapplicabilityofthebuildingfunction，economizesagreatdealofsteelmaterialandimprovesthestructuretobesubjectedtothedintfunctionclearly．Therefore，beclosetomorethanteninthelasthearsestoconstructtheapplicationinthestructuretog

3、etthefastfiercedevelopmentinourcountry．However，whenimplementingtheprestressedtechniquesforlargespanframestructure，someissuesstillremaintobeunsolvedandunclearinthedesignandconstructionprocess．Forexample，theconstructionofprestressedconcretestructuresisdifferentfromthatofreinforcementconcretestructu

4、res．Itnotonlyasksforhigherrequirementsintechnology，butalsohasmorecloserelationshipstodesignandconstruction，asdifferentassumptionsindesignandconstructionmethodmaycausedifferentinternalforces．Thedesignofprestressedconcreteframebasedonthecurrentmethoddoesnotconsiderthatthestructuraltypesandbearinglo

5、advarywiththeconstructionprocess．Thedesignedinternalforcesvaluedeviatefromtherealvalueresultingfromthatanalyticalmodelisdifferentfrompracticalconstructionmethod．Onthispoint，someresearcheswereundertakenbycomparingtheSOcalled“Cast—in—placeandPrestressedStory—by-Story"constructionmethodadoptedinmult

6、i-storiedprestressedconcreteframestructurewiththepopularmethodof“PrestressedafterCompletionofConstruction"．Basedontheoriesofstructuralmechanicsandanalysisofanalyticalresults，discussionwasmadetoeffectofdifferenttensioningconstructionmethodsonthecomprehensiveanddesignedbendingmomentintheframecolumn

7、s．Analyticalandcomputational西南交通大学硕士研究生学位论文第1II页resultsshowthattheeffectismuchsignificant．Thediscrepancybetweenthecomprehensivemomentsderivedfromthemeasuredvalueisrelevantwiltsuchfactorsasthenumberofspans，locationofsec