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ID:36459114
大小:2.64 MB
页数:56页
时间:2019-05-10
《陶粒混凝土梁受弯性能的试验研究》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、长沙理工大学硕士学位论文陶粒混凝土梁受弯性能的试验研究姓名:莫振林申请学位级别:硕士专业:结构工程指导教师:杨伟军20081101混凝土。总之,本文对陶粒混凝土梁受弯性能试验研究具有一定的理论意义,为陶粒混凝土在工业与民用建筑上的广泛应用提供了理论依据。关键词:陶粒混凝土;塑性发展系数Y;钢筋应变不均匀系数1lr;平均裂缝间距Z。;握裹力;延性ⅡAbstractAstheceramisiteaggregateconcretehavemanyadvantagesintheproject,theceramisi
2、teaggregateconcretepossessawideprospect.However,Thecodeoflightweightaggregateconcreteisnotmatureandperfect,itcannotgiveastrongsupportinthepracticalwork.Throughthestudyof12piecesofceramisiteaggregateconcretebeams,thestrainofconcreteandsteel,crackingload,yie
3、ldload,ultimateload,deflection,crackexpansion、theload—deflectioncurveismeasuredandplotted,theexpansionofcrackisdescribedinthepaper.Comparedwiththeconcretebeams,theresultscanbeconcludedinseveralaspects.1.Basedonthetestreach,thedamageconformationisdifferentb
4、etweentheceramisiteaggregateconcreteandthecommonconcrete,fortheinterfacebetweenthegroutingmortarandceramisiteaggregateismorecompactandthestrengthofaggregateisusuallylowerthanthegroutingmortar,crackformsinneraggregateatfirst.2.Basedonthetestresearch,intheco
5、nditionofhigh—reinforcementratio,thecrackofceramisiteaggregatebeamismorewell—distributedandmorecompactthancommonaggregatebeam.Itshowsthat,thecohesionbetweenconcreteandsteelisbettertomaketheirtransformationmoreharmoniousandcoordinate.3.Forthedifferencesinca
6、lculativemodelscalculatingthecrack—load,throughthetest,theplasticgrowthmodulusformulaofceramisiteaggregatebeamissubmitted.4.Fromthedefinitionoftheleverofinternalforce,usethetestresults,theactualvalueisacquiredatthecracksection.Comparedwiththeexperientialva
7、lue,thecodecondensedformulaisbeenprovedreliable.5.Inthetest,thestrainofthesteelonthecracksectionandtheaveragesteelstrainaremeasuredout.Throughthelinearregression,thenon-uniformcoefficientofsteelstrainamongthecrackissuggested,andthencomparethe∞linordertoest
8、imatethediscriminationofthebondstressbetweenthesedifferentconcrete6.Throughthetestresearch,theaveragecrackdistance乞hasthedirectproportionwiththeconcreteprotectionC.Inthispaper,totheactualvalue,thesuggestivefo
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