混凝土柱-蜂窝钢梁组合节点拟静力试验研究
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摘要
为研究复合焊接环式箍筋混凝土柱-蜂窝钢梁组合节点的受力性能。对四种不同连接形式的8个复合焊接环式箍筋混凝土柱-蜂窝钢梁组合节点试件进行了低周反复荷载作用下的拟静力试验,分析了各节点的破坏形态、承载力、受剪性能、延性、耗能性能、滞回特性等。试验结果表明:试件的承载力与节点核心区的配箍率有关,对于钢梁贯通型的梁柱节点,宜加强节点核心区的箍筋配置,有利于提高试件的承载力和延性;外伸式端板连接型试件的承载力最高,但在极限荷载之后出现严重的刚度退化,耗能能力差;核心区加设箍筋的钢梁贯通型试件的承载力、延性和耗能能力均比较好,抗震性能好,能够满足工程实践的要求。
This paper presents research on loading behavior of welded compound-ring-hoop concrete column and honeycombed steel beam composite joints.Eight specimens of welded compound-ring-hoop concrete column and honeycombed steel beam composite joints,designed in 4 different types of connection,were studied through the pseudo-static tests under low cyclic loading.The failure modes,loading capacity,shear behavior,ductility,energy dissipation ability and hysteretic characteristics of the joints were analyzed.The results showed that the loading capacity of specimens is related to stirrup ratio in joint core area.For steel beam-through joint,stirrup ratio in joint core area should be increased,which can result in increased loading capacity and ductility of specimens.The test showed that the loading capacity of extended-end-plate connections was the highest,but their stiffness degraded seriously after ultimate load and their energy dissipation capacity was poor.The loading capacity,ductility and energy dissipation capacity of the steel beam-through joints with layout of stirrups in joint core area were all favorable,and their seismic behaviors were good enough to meet the requirement in engineering practice.
This paper presents research on loading behavior of welded compound-ring-hoop concrete column and honeycombed steel beam composite joints.Eight specimens of welded compound-ring-hoop concrete column and honeycombed steel beam composite joints,designed in 4 different types of connection,were studied through the pseudo-static tests under low cyclic loading.The failure modes,loading capacity,shear behavior,ductility,energy dissipation ability and hysteretic characteristics of the joints were analyzed.The results showed that the loading capacity of specimens is related to stirrup ratio in joint core area.For steel beam-through joint,stirrup ratio in joint core area should be increased,which can result in increased loading capacity and ductility of specimens.The test showed that the loading capacity of extended-end-plate connections was the highest,but their stiffness degraded seriously after ultimate load and their energy dissipation capacity was poor.The loading capacity,ductility and energy dissipation capacity of the steel beam-through joints with layout of stirrups in joint core area were all favorable,and their seismic behaviors were good enough to meet the requirement in engineering practice.
引文
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[2]闫兴华,朱清峰,苏志宏.钢-混凝土混合结构节点抗震设计方法研究综述[J].北京建筑工程学院学报,2006,22(2):1-6.(YAN Xinghua,ZHUQingfeng,SU Zhihong.Anti-seismic design method ofsteel-concrete mixed structure connections[J].Journalof Beijing Institute of Civil Engineering andArchitecture,2006,22(2):1-6.(in Chinese))
[3]陈伟恩.钢-混凝土组合结构节点抗震性能研究[D].福州:福州大学,2002.(CHEN Weien.Studyon seismic behavior of joint of steel-concrete compositestructure[D].Fuzhou:Fuzhou University,2002.(inChinese))
[4]陈红媛,房贞政.钢混凝土组合柱-钢梁结构中柱节点受力性能研究[J].福州大学学报(自然科学版),2003,31(4):460-465.(CHEN Hongyuan,FANGZhenzheng.The behavior of steel reinforced concretecolumn and steel beam middle joint[J].Journal ofFuzhou University(Natural Science Edition),2003,31(4):460-465.(in Chinese))
[5]杨勇,郭子雄,聂建国.型钢高强混凝土组合结构节点抗震设计研究现状[J].基建优化,2005,26(6):100-103.(YANG Yong,GUO Zixiong,NIEJianguo.Research statue of seismic design of SHSC(Steel-high Strength Concrete)structure column-beamjoint[J].Optimization of Capital Construction,2005,26(6):100-103.(in Chinese))
[6]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))
[7]庄云.SRC柱-RC梁组合件抗震性能试验研究[D].泉州:华侨大学,2007.(ZHUANG Yun.Experimental study on seismic behavior of SRC column-RC beam subassemblages[D].Quanzhou:HuaqiaoUniversity,2007.(in Chinese))
[8]梁玉国,刘翠兰,肖良莉,等.高强混凝土框架节点抗震性能研究[J].甘肃工业大学学报,2000,26(4):84-90.(LIANG Yuguo,LIU Cuilan,XIAOLiangli,et al.A study of earthquake-resistant behaviorof high strength reinforced concrete frame joint[J].Journal of Gansu University of Technology,2000,26(4):84-90.(in Chinese))
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