混凝土框架顶部钢结构加层连接节点抗震性能试验研究
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摘要
通过对锚栓生根、焊接生根、增大截面生根等三类共5个加层连接节点进行低周反复荷载作用下的足尺模型试验,对混凝土框架顶部直接加层钢结构连接节点的破坏形态、滞回曲线、位移延性、耗能能力等进行研究。试验结果表明:三类加层节点的破坏形态均为混凝土梁端受弯破坏,混凝土与钢结构之间的螺栓及焊缝连接性能良好,连接过渡钢板未出现明显变形;增大截面生根节点的滞回曲线较为饱满,抗震性能优于锚栓生根节点和焊接生根节点;锚栓生根节点和焊接生根节点的施工工艺相对简单,可操作性较强。
The seismic behavior of three types of joints(bolted joint,welded joint and expanded section joint) between a concrete frame and the added top steel stories was investigated under low cycle load reversals.Performance of the test specimens was evaluated in terms of failure mode,joint shear deformation,energy dissipation capacity and ductility,etc.The test results reveal that all joints fail due to concrete crushing and rupture of longitudinal bars as a result of plastic hinges formed at the fixed beam end.The performance of bolted and welded joints are favorable.The transfer steel plate has no visible deformation.The energy dissipation capacity of the increased section joint is better than that of the bolted and welded joints.The construction technique of bolted and welede joint are simple.The results in this paper are useful to the design and construction of steel adding stories on top of the concrete frame.
The seismic behavior of three types of joints(bolted joint,welded joint and expanded section joint) between a concrete frame and the added top steel stories was investigated under low cycle load reversals.Performance of the test specimens was evaluated in terms of failure mode,joint shear deformation,energy dissipation capacity and ductility,etc.The test results reveal that all joints fail due to concrete crushing and rupture of longitudinal bars as a result of plastic hinges formed at the fixed beam end.The performance of bolted and welded joints are favorable.The transfer steel plate has no visible deformation.The energy dissipation capacity of the increased section joint is better than that of the bolted and welded joints.The construction technique of bolted and welede joint are simple.The results in this paper are useful to the design and construction of steel adding stories on top of the concrete frame.
引文
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[6]王先铁,郝际平,周观根.方钢管混凝土边柱节点抗震性能试验研究[J].建筑结构学报,2008,29(3):120-125.(WANG Xiantie,HAO Jiping,ZHOUGuangen.Experimental studies on seismic behavior ofconnection for concrete-filled square steel tube edgecolumn[J].Journal of Building Structures,2008,29(3):120-125.(in Chinese))
[7]周学军,曲慧.方钢管混凝土框架梁柱节点在低周往复荷载作用下的抗震性能研究[J].土木工程学报,2006,39(1):38-42.(ZHOU Xuejun,QU Hui.Seismic resistance of bolt-weld joint and all-weld joint ofconcrete filled square steel tube and steel beam undercyclic load[J].China Civil Engineering Journal,2006,39(1):38-42.(in Chinese))
[8]周新刚,司伟建,李春祥.钢筋混凝土植筋锚固构件受低周反复荷载作用的恢复力特性[J].建筑结构,2002,32(8):38-40.(Zhou Xingang,Si Weijian,LiChunxiang.Retrofitting behavior of RC members post-embedded with epoxy cement mortal under low-cycleloads[J].Building Structure,2002,32(8):38-40.(in Chinese))
[2]麻建锁,张涛,王元清,等.钢筋混凝土框架顶部钢结构加层的抗震性能分析[J].地震工程与工程振动,2006,26(3):118-120.(Ma Jiansuo,Zhang Tao,Wang Yuanqing,et al.Analysis of seismic resistance ofintegral structure after adding steel storeys on top ofconcrete frame[J].Earthquake Engineering andEngineering Vibration,2006,26(3):118-120.(inChinese))
[3]杨晓明,周东明,李海峰.某高层建筑加层钢框架柱脚节点的抗震构造[J].工业建筑,2007,37(9):113-115.(Yang Xiaoming,Zhou Dongming,LiHaifeng.The seismic constructional disposal on thecolumn base joint of steel frame adding story on the topof a tall bullding[J].Industrial Construction,2007,37(9):113-115.(in Chinese))
[4]张涛,王元清,石永久.多层建筑顶部轻钢加层柱脚节点的设计与构造[J].施工技术,2005,34(10):36-38.(ZHANG Tao,WANG Yuan-qing,SHI Yong-jiu.The design and constructional disposal on thecolumn base joint of lightweight steel adding story on thetop of multistoried building[J].ConstructionTechnology,2005,34(10):36-38.(in Chinese))
[5]吕西林,郭子雄,王亚勇.RC框架梁柱组合件抗震性能试验研究[J].建筑结构学报,2001,22(1):2-7.(LU Xilin,GUO Zixiong,WANG Yayong.Experimental study on seismic behavior of beam-columnsubassemblages in RC frame[J].Journal of BuildingStructures,2001,22(1):2-7.(in Chinese))
[6]王先铁,郝际平,周观根.方钢管混凝土边柱节点抗震性能试验研究[J].建筑结构学报,2008,29(3):120-125.(WANG Xiantie,HAO Jiping,ZHOUGuangen.Experimental studies on seismic behavior ofconnection for concrete-filled square steel tube edgecolumn[J].Journal of Building Structures,2008,29(3):120-125.(in Chinese))
[7]周学军,曲慧.方钢管混凝土框架梁柱节点在低周往复荷载作用下的抗震性能研究[J].土木工程学报,2006,39(1):38-42.(ZHOU Xuejun,QU Hui.Seismic resistance of bolt-weld joint and all-weld joint ofconcrete filled square steel tube and steel beam undercyclic load[J].China Civil Engineering Journal,2006,39(1):38-42.(in Chinese))
[8]周新刚,司伟建,李春祥.钢筋混凝土植筋锚固构件受低周反复荷载作用的恢复力特性[J].建筑结构,2002,32(8):38-40.(Zhou Xingang,Si Weijian,LiChunxiang.Retrofitting behavior of RC members post-embedded with epoxy cement mortal under low-cycleloads[J].Building Structure,2002,32(8):38-40.(in Chinese))
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