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1、2005年全國砌體結(jié)構(gòu)基本理論與工程應(yīng)用學(xué)術(shù)會議論文集配筋混凝土砌塊砌體剪力墻結(jié)構(gòu)基于位移的抗震設(shè)計方法梁興文,李曉文,鄧明科(西安建筑科技大學(xué),西安710055)摘要:根據(jù)配筋混凝土砌塊砌體剪力墻結(jié)構(gòu)的特點,將其性能劃分為使用良好、保證人身安全和防止倒塌三個水平,并用層間位移角限值予以量化。用作用倒三角形水平分布荷載的等截面弩曲懸臂桿的側(cè)移曲線作為其初始側(cè)移模式。對于使用良好性能水平,將剪力墻結(jié)構(gòu)體系頂層的層間位移角剛好達(dá)到相應(yīng)限值時的側(cè)移曲線作為目標(biāo)側(cè)移曲線,據(jù)此計算等效單自由度體系的等效參數(shù)以及原結(jié)構(gòu)的基底剪力
2、和各質(zhì)點的水平地震作用。對于保證人身安全和防止倒塌的性能水平,根據(jù)Pushover曲線與需求曲線的關(guān)系予以調(diào)整,使結(jié)構(gòu)滿足這兩個性能水平的要求。本文方法簡單實用,設(shè)計結(jié)果可靠。關(guān)鍵詞:配筋剪力墻結(jié)構(gòu);基于位移的抗震設(shè)計:性能水平;等效參數(shù)ResearchonDiaplacement—basedSeismicDesignMethodofReinforcedBlockMasonryShearWallStructuresLIANGXingwen,LIXiaowen,DENGMingke(xi’allUniversityof
3、ArchitectureandTechnology,Xi’all710055)Abstract:AccordingtOthecharacteristicofreinforcedblockmasonryshearwallSllalCtUreS,theseismicperformancelevelisdividedintothreelevels.whichareserviceability,life-safety,andcollapseprotectioninthispaper.Thethreelevelsalequal
4、ified謝tllstoreydriftangles.ApplyingtheinvertedtriangulardistributionoflateralforcetOthecantileverwallwimidenticalsection.thedisplacedshapeisregardedastheinitiallateraldisplacementmodeoftheshearwallstructure.Intheserviceabilitype-rformancelevel,thecurvatureatthe
5、bottomcrosssectionofthefirststoreyoftheshearwallstructurereachesyieldcurvatureisassumed.Andinthecollapseprotectionperformancelevel,thecurvatureatthesamecrosssectionoftheshearwallSll'ucturereachesultimatecurvatureisassumed.Then,thetargetdisplacementmodesofthetwo
6、performancelevelscallbeobtained.BasedOnthetargetdisplacementmodeofthereinforcedblockmasonryshearwallSRqlCtureintheserviceabilityperformancelevel,theeffectiveparametercallbeobtained.Thus,thebaseshear%andhorizontalearthquakeforceEateachfloorofthebuildingCallbedet
7、ermined.Combiningthehorizontalearthquakeactioneffectwithcorrespondinggravityloadeffect,thedesigninternalforcesoftheshearwallcriticalsectionsareobtained.thenthestructuralmembersCanbedesignedtosatisfystrengthdemandanddetailsofseismicdesign.Finally,thedesignedstru
8、ctureisanalyzed、聃血nonlinearstaticanalysismethodandthedesignisadjustedbythepushoveranalysisresultuntilitissatisfied.Keywords:blockmasonryshearwallSlXUCtUre;displacement-based