火电厂有粘结预应力混凝土框架抗震性能试验研究

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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