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1、第44卷第10期土木工程學報Vol.44No.102011年10月CHINACIVILENGINEERINGJOURNALOct.2011半剛接鋼框架-十字加勁鋼板剪力墻結構滯回性能研究郭宏超郝際平虎奇李峰(西安建筑科技大學,陜西西安710055)摘要:對一榀單跨兩層半剛接框架-十字加勁鋼板剪力墻結構進行水平反復荷載作用下的抗震試驗研究,系統(tǒng)分析結構破壞模式和耗能機理,研究節(jié)點剛度與加勁墻體的相互影響效果,得到了承載力,延性,剛度和耗能能力等指標。試驗結果表明:該種結構具有良好的延性和耗能性能,安全儲備高;節(jié)點剛度退化小,內(nèi)填鋼板的設置緩解了節(jié)點區(qū)自身的延性要求,半鋼框架和墻板協(xié)同工作良好;加
2、勁肋的設置改善了鋼板的實際受力,提高墻體的承載力及剛度,減輕了滯回曲線的“捏縮”現(xiàn)象,減小鋼板噪音及震顫。結構破壞模式為加勁肋屈曲,內(nèi)填鋼板以小區(qū)格局部屈曲為主,伴隨相關屈曲;框架柱腳及梁柱半剛性連接部位形成塑性鉸;試件面內(nèi)呈彎曲破壞模式,研究為該種結構體系的工程應用和理論分析提供依據(jù)。關鍵詞:十字加勁;鋼板剪力墻;半剛接鋼框架;滯回曲線;破壞模式;耗能機理中圖分類號:TU398文獻標識碼:A文章編號: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節(jié)點可節(jié)約成本,避免剛性節(jié)點的加強,簡化節(jié)點構引言造,提高施工效率。但半剛性連接剛度較小且非線性變化,對構件約束相對減弱,會增大結構的層間位移,在滿足結構側移