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1、Y977885長(zhǎng)安大學(xué)碩士學(xué)位論文加蕉渥登±框翌掛笪撞震性篚班究申請(qǐng)學(xué)位級(jí)別塑±學(xué)科名稱(chēng)縊煎墨整論文提交日期絲絲主!旦論文答辯日期墨豎主!笪絲望摘要大量震害和試驗(yàn)研究表明,在地震作用下,混凝土框架柱的破壞往往是地震中框架及框架剪力墻房屋發(fā)生倒塌的主要原因。提高框架柱的延性性能是防止框架柱破壞的重要手段,可采用的工程做法很多,其中采用鋼管混凝土柱和鋼骨混凝土柱效果更為顯著。本文研究對(duì)象是一種較新的框架柱型式一加芯混凝土框架柱。本文通過(guò)1根普通混凝土框架柱和4根加芯混凝土框架柱的偽靜力試驗(yàn),描述了試件的破壞過(guò)程,并對(duì)各試件的V-△滯回
2、曲線(xiàn)、骨架曲線(xiàn)和位移延性比等試驗(yàn)結(jié)果進(jìn)行了研究,討論了影響其延性的主要因素。試驗(yàn)和分析結(jié)果表明,芯柱核心區(qū)面積是影響試件延性及彈塑性變形性能的重要因素;芯柱的體積配箍率和縱筋配筋率對(duì)加芯混凝土框架柱的延性及彈塑性變形性能均有影響.在高軸壓比下,芯柱采用較大的核心區(qū)面積、體積配箍率及縱筋配筋率是保證混凝土框架柱抗震延性的重要措施。另外,本文采用。條元法”開(kāi)發(fā)了計(jì)算加芯混凝土框架柱彎矩一曲率關(guān)系的程序.?dāng)?shù)值計(jì)算結(jié)果與試驗(yàn)數(shù)據(jù)吻合較好。。關(guān)鍵詞:芯柱抗震性能模型試驗(yàn)延性數(shù)值計(jì)算AbstractMostexperimentresearch
3、esandearthquakedamageindicatethatundertheeffectofearthquake,thecollapseofbuildingisalwaysduetofailureofreinforcedconcretecolumnswhichcanbepreventedbyimprovingtheductilityofconcretecolumns.Therearc:manyengineeringmethodstoimprovethequalityofcolumns.UsingConcreteFilledS
4、teelTubularColumnsandSteelEncasedConcreteColumnswillmakemoreeffectiveness.Thereisakindofnewmodereinforcedconcretecolumnsisimprovedinthearticle,whichisConcreteFrameColumnswithCentralReinforcement.Based011theexperimentalstudyon0110RemfoTcedconcretecolumnandfour‘Concrete
5、FrameColumnswithCentralReinforcementwithhighaxialcompressionratio;underhorizontalcyclicloading,thispaperdescribedtheprocessofdestroyandstudied≠thetestresultsofeachspecimen,includingV-AhysteresisChiVe,skeletoncnrvcanddisplacementductilityratio,etc。,analyzedthemajorfact
6、orsaffectingtheductilityofConcreteFrameColumnswithCentralReinforcement.Thetestandanalysisresultsshowthatamof∞mcolumnismajorfactorsaffectingboththeductilityandearthquakeresistanceofconcreteframecolumns;volumetrictieratioandlongitudinalreinforcementratioofcentralreinfor
7、cementarealsoaffectedboththeductilityandearthquakeresistanceofconcreteframecolumns.Usingbiggerargaofcorecolumn,largevolumetrictiemtioandiongitudinalrehfforcementratioarcimportantmeasurestocnsuregoodseismicductilityofconcreteframecolumnswithcentralreinforcementatahighl
8、evelofaxialcompressionratio.Moreover,theprocedureofmomentofflexureandcurvaturetostudytheductilityabilityofConcreteFrameColum