資源描述:
《冷彎薄壁型鋼混凝土剪力墻受剪性能試驗研究》由會員上傳分享,免費在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、建筑結(jié)構(gòu)學(xué)報JournalofBuildingStructures第31卷第11期2010年11月012Vol.31No.11Nov.2010文章編號:1000-6869(2010)11-0083-09冷彎薄壁型鋼混凝土剪力墻受剪性能試驗研究馮鵬1,初明進1,2,葉列平1,侯建群3(1.清華大學(xué)土木工程安全與耐久教育部重點實驗室,北京100084;2.煙臺大學(xué)土木工程學(xué)院,山東煙臺264005;3.清華大學(xué)建筑設(shè)計研究院,北京100084)摘要:通過7個冷彎薄壁型鋼混凝土(CTSRC)剪力墻的擬靜力水平往復(fù)試驗,研究了其破壞過程和破
2、壞模式,分析了混凝土強度、剪跨比、軸壓比、水平分布筋和豎向型鋼量等參數(shù)對其受剪性能的影響。試驗結(jié)果表明:隨著水平配筋率、軸壓比和混凝土強度的增加受剪承載力提高;隨著剪跨比提高,墻體受剪承載力降低;軸壓比增加可提高墻體剛度,推遲墻體裂縫的出現(xiàn),但不利于墻體延性;增加水平配筋可使墻體峰值后的承載力保持穩(wěn)定。研究表明:CTSRC剪力墻與傳統(tǒng)鋼筋混凝土剪力墻的破壞特征和受力性能不同,在水平力作用下將出現(xiàn)沿冷彎薄壁型鋼的豎向裂縫,經(jīng)歷整體墻到分縫墻的演變,避免了脆性剪切破壞。通過合理設(shè)計,CTSRC剪力墻可實現(xiàn)正常使用階段有較高的剛度、峰值后
3、有較好的延性、破壞時仍具有較高的豎向承載能力的目標。關(guān)鍵詞:混凝土剪力墻;冷彎薄壁型鋼;剪壓比;分縫墻;豎縫;擬靜力試驗;受剪性能中圖分類號:TU398.2TU392.1TU317.1文獻標志碼:AExperimentalstudyonshearbehaviorofcold-formedthin-walledsteelreinforcedconcreteshearwallsFENGPeng1,CHUMingjin1,2,YELieping1,HOUJianqun3(1.KeyLaboratoryofCivilEngineeringS
4、afetyandDurabilityofChinaMinistryofEducation,TsinghuaUniversity,Beijing100084,China;2.SchoolofCivilEngineering,YantaiUniversity,Yantai264005,China;3.ArchitecturalDesign&ResearchInstitute,TsinghuaUniversity,Beijing100084,China)Abstract:Sevencold-formedthin-walledsteelre
5、inforcedconcrete(CTSRC)shearwallsweretestedquasi-staticallyunderlowcycliclateralloadstoacquiretheirshearfailureprocessandmodes.Theeffectsoftheconcretestrength,theshear-spanratio,theaxialload,andtheamountofthehorizontalreinforcementswereinvestigated.Thetestresultsshowth
6、attheshearcapacityofthewallriseswiththeincreaseoftheamountofhorizontalreinforcements,theaxialloadandtheconcretestrength,andreduceswiththeincreaseofshearspanratio.Theincrementoftheaxialcompressionratiopostponescrackingbutreducestheductility.Thestablepost-peakloadcapacit
7、ycanbeacquiredbyincreasetheamountofhorizontalreinforcements.Inthetests,theCTSRCwallsperformthedifferentfailurecharacteristicandbehaviorstotheconventionalreinforcedconcretewall,intermsofthattheydevelopfromintegralwallsintoslitwallsforappearingtheverticalcracksalongcold-
8、formedthin-walledsteelprofiles.Astheresults,thebrittleshearfailureisextinct.Hence,theproperlydesignedCTSRCshearwallha