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ID:5369903
大小:137.02 KB
页数:4页
时间:2017-12-08
《混凝土柱的徐变和收缩对钢筋的影响分析》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、The12thInternationalSymposiumonStructuralEngineeringTHEINFLUENCEOFSTEELREINFORCEMENTONCREEPANDSHRINKAGEOFCONCRETECOLUMNSTiejunLiu,LeileiGuo,DujianZouShenzhenGraduateSchool,HarbinInstituteofTechnology,Shenzhen518055,P.R.ChinaAbstract:Itbecomesincreasinglyimportantforestimatingcreepands
2、hrinkageaccuratelyasresultesoftheincreasinghigh-risereinforcedconcretebuildings.Steelreinforcementshaveasignificantimpactonthecreepandshrinkageofconcrete,whichmakestheestimationmorecomplexanddifficult.Inthispaper,therestrainteffectofsteelreinforcementswasanalyzedandtheformulastocalcul
3、atetime-dependentdeformationandstressofaxiallycompressedcolumnswerederived.AcasestudywasdonetodiscussthetimedependentcreepandshrinkageofcolumnsaccordingtoCEB-FIP1990codeandGL2000code.ThedeformationofcolumnswithdifferentreinforcementratioswascalculatedaccordingtoGL2000code.Itisshowntha
4、t,duetotheexistenceofsteelreinforcements,the50yearsdeformationwasdecreasedbyabout10%-40%.Toevaluatethevalidityofthetheoreticalderivation,thecreepandshrinkageofRCcolumnspecimenswithdifferentreinforcementratioswasexperimentalinvestigated.Theexperimentalresultesindicatedthatdeformationre
5、ductionratioinducedbysteelreinforcementwashigherthanthecalculatedvalues.Keywords:Creep,shrinkage,reinforcementratio,restrainteffect1INTRODUCTIONsegments.Thedeformationandstressofeverytimeintervaliscalculatedwiththeiterativemethod.TheshrinkageandcreepareinherentColumnisoneofmostimporta
6、ntgravityloadcharacteristicofconcretematerial.Thegravitybearingelementsinastructure.Itissignificantloadbearingelementsofconcretebuildignsaretoevaluatetheirtime-dependentderformationsubjectedtoshringkageandcreepduringtheaccurate.Inthispaper,therestrainteffectofconstructionprocessandser
7、vicelife,andthesteelreinforcementsisanalyzedandtheinfluenceofshrinkageandcreeponperformanceformulastocalculatetime-dependentofstructuresbecomesincreasingsignificantwithdeformationandstressofaxialcompressestheincreasingofhigh-risebuildings.Alotofcolumnswerederived.Furthermore,anshrinka
8、geand
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