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1、2005年全國砌體結構基本理論與工程應用學術會議論文集配筋混凝土砌塊砌體剪力墻結構基于位移的抗震設計方法梁興文,李曉文,鄧明科(西安建筑科技大學,西安710055)摘要:根據配筋混凝土砌塊砌體剪力墻結構的特點,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移曲線作為其初始側移模式。對于使用良好性能水平,將剪力墻結構體系頂層的層間位移角剛好達到相應限值時的側移曲線作為目標側移曲線,據此計算等效單自由度體系的等效參數以及原結構的基底剪力
2、和各質點的水平地震作用。對于保證人身安全和防止倒塌的性能水平,根據Pushover曲線與需求曲線的關系予以調整,使結構滿足這兩個性能水平的要求。本文方法簡單實用,設計結果可靠。關鍵詞:配筋剪力墻結構;基于位移的抗震設計:性能水平;等效參數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