方钢管混凝土柱-钢梁节点抗震性能试验研究与有限元分析
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摘要
根据《矩形钢管混凝土结构技术规程》推荐的节点形式,制作5个隔板贯穿式节点试件,通过低周反复加载试验,探讨此类节点的抗震性能,分析梁端翼缘两侧的侧板、钢管柱的宽厚比以及隔板的外伸长度等因素对节点抗震性能的影响。试验结果表明:各试件实测滞回曲线均比较饱满,没有明显的刚度退化现象,具有较好的耗能性能;梁端翼缘两侧增加侧板不仅可以缓解隔板与梁相交的角隅处应力集中现象,而且提高了节点的延性。运用ANSYS 8.0对各节点试件在低周反复荷载作用下的滞回性能进行非线性模拟计算,分析轴压比、核心区混凝土强度、隔板外伸长度等因素对节点受力性能的影响。结果表明:轴压比和隔板外伸长度对节点受力性能的影响较大;有限元计算所得的骨架曲线与实测骨架曲线吻合较好。
Based on the technical specification for structures with concrete-filled rectangular steel tube members, five specimens of new connection-inner and through-type diaphragm subassembly were manufactured. The seismic resistance behavior of connections was studied through cyclic loading tests and parametric analyses were conduced on the connections to investigate the influences of the additional plates to both sides of flanges, the width-to-thickness ratio of the column and the length of the through diaphragm. It is found that the hysteresis curves attained in the experiment are full and show no obvious stiffness deterioration, and the connections have a good energy dissipation capacity; the stress distributing can be ameliorated and the ductility of the connections can also be improved through welding the additional plates to both sides of the flanges. The nonlinear finite element models were also used to analyze the hysteresis behavior of the connections under cyclic loading using ANSYS 8.0. Based on the proper finite element model, the influences of the compression ratio, the concrete strength in the steel tube and the length of the through diaphragm on the mechanism behavior of connections were analyzed. Analytical results show compression ratio and the length of through diaphragm are more important to the connections; the framework curves of the finite element models show good agreement with those of the experiments.
Based on the technical specification for structures with concrete-filled rectangular steel tube members, five specimens of new connection-inner and through-type diaphragm subassembly were manufactured. The seismic resistance behavior of connections was studied through cyclic loading tests and parametric analyses were conduced on the connections to investigate the influences of the additional plates to both sides of flanges, the width-to-thickness ratio of the column and the length of the through diaphragm. It is found that the hysteresis curves attained in the experiment are full and show no obvious stiffness deterioration, and the connections have a good energy dissipation capacity; the stress distributing can be ameliorated and the ductility of the connections can also be improved through welding the additional plates to both sides of the flanges. The nonlinear finite element models were also used to analyze the hysteresis behavior of the connections under cyclic loading using ANSYS 8.0. Based on the proper finite element model, the influences of the compression ratio, the concrete strength in the steel tube and the length of the through diaphragm on the mechanism behavior of connections were analyzed. Analytical results show compression ratio and the length of through diaphragm are more important to the connections; the framework curves of the finite element models show good agreement with those of the experiments.
引文
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[11]林于东,林杰,宗周红.低周反复荷载作用下矩形钢管混凝土柱与钢梁连接节点的受力性能[J].地震工程与工程振动,2004,24(4):62―69.Lin Yudong,Lin Jie,Zong Zhouhong.Behavior of connections of rectangular concrete filled steel tubular column with steel beam subjected to reversed low cyclic loading[J].Earthquake Engineering and Engineering Vibration,2004,24(4):62―69.(in Chinese)
[12]Bangash M Y H.Concrete and concrete structures:numerical modeling and applications[M].London:Elsevier Applied Science,1989.
[13]Hajjar J F,Schiller P H,Molodan A.A distributed plasticity model for concrete-filled steel tube beam-columns with interlayer slip[J].Engineering Structure,1998,20(8):663―676.
[14]宗周红,葛继平,杨跃强.低周反复荷载作用下方钢管混凝土柱与钢梁连接节点非线性有限元分析[J].建筑结构学报,2006,27(2):75―81.Zong Zhouhong,Ge Jiping,Yang Yueqiang.Nonlinear finite element analysis of the concrete filled square steel tubular column to steel beam connections under low-cycle reversed loading[J].Journal of Building Structures,2006,27(2):75―81.(in Chinese)
[15]陈鹃,王湛,袁继雄.加强环式钢管混凝土柱-钢梁节点的刚性研究[J].建筑结构学报,2004,25(4):43―54.Chen Juan,Wang Zhan,Yuan Jixiong.Research on the stiffness of concrete filled tubular column and steel beam joint with stiffening ring[J].Journal of Building Structures,2004,25(4):43―54.(in Chinese)
[2]同济大学,浙江杭萧钢构股份有限公司.矩形钢管混凝土结构技术规程(CECS159:2004)[S].第1版.北京:计划出版社,2004.Tongji University,Zhejiang Hangxiao steel structure Co.Ltd.Technical specification for structures with concrete-filled rectangular steel tube members(CECS159:2004)[S].1st Edition.Beijing:The Plan Press,2004.(in Chinese)
[3]Elremaily A,Azizinamini A.Design provisions for connections between steel beams and concrete filled tube columns[J].Journal of Constructional Steel Research,2001,57:971―995.
[4]张素梅,刘界鹏,王玉银.双向压弯方钢管高强混凝土构件滞回性能试验与分析[J].建筑结构学报,2005,26(3):9―16.Zhang Sumei.Liu Jiepeng,Wang Yuyin.Hysteretic behavior of biaxially loaded high strength concrete-filled square hollow section beam-columns[J].Journal of Building Structures,2005,26(3):9―16.(in Chinese)
[5]邱法维,钱稼如,陈志鹏.结构抗震实验方法[M].北京:科学出版社,2000.Qiu fawei,Qian Jiaru,Chen Zhipeng.Testing methods for earthquake resistant structure[M].Beijing:The Scientific Press,2000.(in Chinese)
[6]中国建筑科学研究院,建筑抗震试验方法规程(JGJ101-96)[S].第1版.北京:中国建筑工业出版社,1997.Specification of testing methods for earthquake resistant building(JGJ101-96)[S].1st Edition.Beijing:Chinese Building Industry Press,1997.(in Chinese)
[7]唐九如.钢筋混凝土框架节点抗震[M].南京:东南大学出版社,1989.Tang Jiuru.The earquake resistance of reinforce concrete frame connection[M].Nanjing:Southeast University Press,1989.(in Chinese)
[8]Fujimoto T,Inai E,Kai M.Behavior beam-to-column connection of column system[C].The12th WCEE,2000,2197:1―8.
[9]Cheng C T,Hwang P S,Lu L Y,Chung L L.Connection behavior of steel beam to concrete-filled circular steel tubes[C].Proceeding of6th ASCCS Conference,Los Angeles,USA,2000,81―589.
[10]周天华,何保康,陈国津.方钢管混凝土柱与钢梁框架节点的抗震性能试验研究[J].建筑结构学报,2004,25(1):9―16.Zhou Tianhua,He Baokang,Chen Guojin.Experimental studies on seismic behavior of concrete-filled steel tubular column and steel beam joints under cyclic loading[J].Journal of Building Structures,2004,25(1):9―16.
[11]林于东,林杰,宗周红.低周反复荷载作用下矩形钢管混凝土柱与钢梁连接节点的受力性能[J].地震工程与工程振动,2004,24(4):62―69.Lin Yudong,Lin Jie,Zong Zhouhong.Behavior of connections of rectangular concrete filled steel tubular column with steel beam subjected to reversed low cyclic loading[J].Earthquake Engineering and Engineering Vibration,2004,24(4):62―69.(in Chinese)
[12]Bangash M Y H.Concrete and concrete structures:numerical modeling and applications[M].London:Elsevier Applied Science,1989.
[13]Hajjar J F,Schiller P H,Molodan A.A distributed plasticity model for concrete-filled steel tube beam-columns with interlayer slip[J].Engineering Structure,1998,20(8):663―676.
[14]宗周红,葛继平,杨跃强.低周反复荷载作用下方钢管混凝土柱与钢梁连接节点非线性有限元分析[J].建筑结构学报,2006,27(2):75―81.Zong Zhouhong,Ge Jiping,Yang Yueqiang.Nonlinear finite element analysis of the concrete filled square steel tubular column to steel beam connections under low-cycle reversed loading[J].Journal of Building Structures,2006,27(2):75―81.(in Chinese)
[15]陈鹃,王湛,袁继雄.加强环式钢管混凝土柱-钢梁节点的刚性研究[J].建筑结构学报,2004,25(4):43―54.Chen Juan,Wang Zhan,Yuan Jixiong.Research on the stiffness of concrete filled tubular column and steel beam joint with stiffening ring[J].Journal of Building Structures,2004,25(4):43―54.(in Chinese)
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