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时间:2020-04-02
《框架_十字加劲钢板剪力墙结构滞回性能研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第44卷第10期土木工程学报Vol.44No.102011年10月CHINACIVILENGINEERINGJOURNALOct.2011半刚接钢框架-十字加劲钢板剪力墙结构滞回性能研究郭宏超郝际平虎奇李峰(西安建筑科技大学,陕西西安710055)摘要:对一榀单跨两层半刚接框架-十字加劲钢板剪力墙结构进行水平反复荷载作用下的抗震试验研究,系统分析结构破坏模式和耗能机理,研究节点刚度与加劲墙体的相互影响效果,得到了承载力,延性,刚度和耗能能力等指标。试验结果表明:该种结构具有良好的延性和耗能性能,安全储备高;节点刚度退化小,内填钢板的设置缓解了节点区自身的延性要求,半钢框架和墙板协同工作良好;加
2、劲肋的设置改善了钢板的实际受力,提高墙体的承载力及刚度,减轻了滞回曲线的“捏缩”现象,减小钢板噪音及震颤。结构破坏模式为加劲肋屈曲,内填钢板以小区格局部屈曲为主,伴随相关屈曲;框架柱脚及梁柱半刚性连接部位形成塑性铰;试件面内呈弯曲破坏模式,研究为该种结构体系的工程应用和理论分析提供依据。关键词:十字加劲;钢板剪力墙;半刚接钢框架;滞回曲线;破坏模式;耗能机理中图分类号:TU398文献标识码:A文章编号:1000-131X(2011)10-0035-10Hystereticbehaviorofsemi-rigidcompositesteelframeswithcross-stiffenedste
3、elplateshearwallsGuoHongchaoHaoJipingHuQiLiFeng(Xi’anUniversityofArchitectureandTechnology,Xi’an710055,China)Abstract:Basedontheexperimentofaone-bay,two-storysemi-rigidcompositesteelframemodelwithcross-stiffenedsteelplateshearwallunderlateralcyclicloads,theinteractionbetweenthejointstiffnessandcross
4、-stiffenedsteelplateshearwall,thefailuremodeandenergydissipationmechanicsofthestructurewereanalyzedwithregardtotheload-carryingcapacity,ductility,stiffnessandenergydissipationcapacity.Theresultsshowedthatthespecimenexhibitedexcellentductility,energydissipationcapacityandsafetymargin.Thestiffnessdegr
5、adationofthejointswasnotserious,andtherequirementforductilitywasloweredbytheinfillpanelsandthecollaborationbetweentheframeandthesteelplateshearwall.Thestiffenersimprovedtheworkconditionofthesteelpanels,increasedthestiffnessandload-carryingcapacityofthepanels,andreducedtheshrinkageofthehysteresisloop
6、andthenoiseandtremorofthepanels.Thefailuremodeofthestructuremightbeinducedbybucklingofthestiffeners,localbucklingandinteractivebucklingoftheinfillpanels,plastichingeswereformedatthebottomsemi-rigidconnectionofthecolumn,andthein-planefailureofthespecimenwasbendingfailure.Keywords:cross-stiffened;stee
7、lplateshearwall;steelframewithSRconnection;hysteresiscurve;failuremode;energy-dissipationmechanismE-mail:ghc-1209@163.com节点可节约成本,避免刚性节点的加强,简化节点构引言造,提高施工效率。但半刚性连接刚度较小且非线性变化,对构件约束相对减弱,会增大结构的层间位移,在满足结构侧移
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