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ID:37394321
大小:9.55 MB
页数:119页
时间:2019-05-23
《火电厂有粘结预应力混凝土框架抗震性能试验研究》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、武汉理工大学博士学位论文火电厂有粘结预应力混凝土框架抗震性能试验研究姓名:夏训成申请学位级别:博士专业:桥梁与隧道工程指导教师:卢哲安20090401武汉理1:人学博士学位沦文AbstractThedeaeratorsandcoal-bunkerbaysofmainpowerhousesofthermalpowerplantsareusuallyimposedonheavyverticalloadsandthetransversalspansareverylarge.Comparedwiththeconv
2、entionalstructuraldesign,namelythenormalreinforcedconcrete(bent)frames,theprestressedconcrete(PC)framesarescarcelyappliedinthermalpowerplantshomeandaboard.TherearestillmanycontroversiesonaseismaticperformanceofPCframesastheyareappliedinindustrialbuildings
3、withspecialtechnologicalrequirements.Therefore,itisneededforfurtherexploratoryresearchandimprovementsfortheaseismaticperformance.FocusingonthePCframe,thepseudo—statictestofplanarframeandtheshakingtabletestofspaceframearecompleted;simultaneously,thetestres
4、ultsandthenumericalsimulationarecomparedandanalyzed.Themainresearchworkincludes:1.Pseudostatictest.Basedontheexperimentonacommonmultilayersingle-spanprestressedconcreteplanarflame,followingstudiesarechieflyconductedinthischarpter:thefailurepatternofthefra
5、meunderhorizontalearthquakes;thehysteresiscurves,skeletoncurves,stiffnessdegradationCurvesandstraincurves;thedisplacementductilityfactor,girdercurvatureandangle;thesequenceofplastichingejointsandthefailuremechanism.2.Shakingtabletest.Astheresearchobject,t
6、hedynamicresponseofamultilayersingle—spanPCspaceframeisanalyzedwhichissubjectedtothreeearthquakes.Accordingtothephenomenonoftest,thestructuraldestructionfeaturesareanalyzed;theperiodandmodeofvibrationofprototypearededuced;theinfluencedegreeofthetorsionont
7、hestructure,thestiffnessdegradationamplitude,inertialforcedistributionoflayers,timehistoryofaccelerationanddisplacementarecalculatedanddiscussed.3.AspaceframeFEmodelisestablishedbythree—dimensionalentityelementsandthenonlinearfiniteelementdynamictime-hist
8、oryanalysisisconducted.Basedonthecomparisonofanalysisresultsandexperimentalresults,itismainlystudiedonthestructuralreactionundersmallandstrongearthquakes.Theresultsofplaneframemodelandspatialframemodelarecomparedwhi
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