梁端塑性铰外移的型钢混凝土节点的抗震性能
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摘要
通过对两个足尺节点试件的低周反复荷载试验,研究了梁端塑性铰外移的型钢混凝土节点的抗震性能.试件按“强节点”原则进行设计,对节点核心区附近梁端工字形型钢的上、下翼缘采取狗骨式削弱,并适当增加梁端根部到型钢翼缘最大削弱部位的纵向钢筋的配筋量.试验结果表明:两个节点试件的位移延性系数在5.27以上,均符合抗震设计的延性要求;在最大荷载时,两个试件的等效粘滞阻尼系数均超过0.30,耗能能力强.理论分析表明:在型钢混凝土节点中采用塑性铰外移的构造措施,不仅能够降低节点核心区所受的剪力以及梁柱连接焊缝的应力,而且能够增强节点试件在塑性铰区的转动能力和抗剪性能,从而提高节点的延性和耗能能力.
The seismic behaviors of steel reinforced concrete joints with plastic hinge shifting away from the beam end were investigated based on the experimental results of 2 full-scale joint specimens under cyclic loading.In the investigation,the joints designed as strong connections were treated with dog-bone style weakening on the upper and below flanges of the H-type steel at the beam end near the joint core,and the longitudinal reinforcement ratio,which distributes from the root of beam end to the maximum weakened flange of the H-type steel,was properly increased.Experimental results show that the ductility factors of the 2 joint specimens are all more than 5.27,which meets the requirements of the ductile frame in seismic design,and that the equivalent viscous damping coefficients on the maximum load are all more than 0.30,which reveals quite high energy dissipation of the joints.Moreover,it is indicated from analyses that the constitution of plastic hinges for steel reinforced concrete joints can not only decrease the shear in the joint core and the stress of seam in the beam-column connection but also improve the rotation and shear capacities of plastic hinges in the beams,thus increasing the ductility and energy dissipation of the joints.
The seismic behaviors of steel reinforced concrete joints with plastic hinge shifting away from the beam end were investigated based on the experimental results of 2 full-scale joint specimens under cyclic loading.In the investigation,the joints designed as strong connections were treated with dog-bone style weakening on the upper and below flanges of the H-type steel at the beam end near the joint core,and the longitudinal reinforcement ratio,which distributes from the root of beam end to the maximum weakened flange of the H-type steel,was properly increased.Experimental results show that the ductility factors of the 2 joint specimens are all more than 5.27,which meets the requirements of the ductile frame in seismic design,and that the equivalent viscous damping coefficients on the maximum load are all more than 0.30,which reveals quite high energy dissipation of the joints.Moreover,it is indicated from analyses that the constitution of plastic hinges for steel reinforced concrete joints can not only decrease the shear in the joint core and the stress of seam in the beam-column connection but also improve the rotation and shear capacities of plastic hinges in the beams,thus increasing the ductility and energy dissipation of the joints.
引文
[1]林凡,蔡健,刘付钧,等.新型钢管混凝土板柱结构中柱节点抗震性能试验研究[J].华南理工大学学报:自然科学版,2005,33(11):79-84.Lin Fan,Cai Jian,Liu Fu-jun,et al.Experimental investi-gation into anti-seismic behavior of a novel interior slab-CFST column connection[J].Journal of South ChinaUniversity of Technology:Natural Science Edition,2005,33(11):79-84.
[2]Parra-Montesinos G,Wight J K.Modeling shear behaviorof hybrid RCS beam-column connections[J].Journal ofStructural Engineering,ASCE,2001,127(1):3-11.
[3]Parra-Montesinos G,Liang X.Towards deformation-basedcapacity design of RCS beam-column connections[J].Engineering Structures,2003,25(5):681-690.
[4]Kanno R,Deierlein G G.Seismic behavior of composite(RCS)beam-column joint subassemblies[C]∥Procee-dings of the 1996 Engineering Foundation Conference onComposite Construction in Steel and Concrete III.Irsee:[s.n.],1996:236-249.
[5]薛建阳,赵鸿铁.型钢混凝土节点抗震性能及构造方法[J].世界地震工程,2002,18(2):61-64.Xue Jian-yang,Zhao Hong-tie,Yang Yong.Seismic beha-vior and construction method of steel reinforced concretejoints[J].World Earthquake Engineering,2002,18(2):61-64.
[6]Nestor I,Sergio Z.Steel moment frames resolution of re-cent seismic detailing and material shape issues[J].Journal of Constructional Steel Research,2002,58(1):495-510.
[7]Chou Chung-che,Uang Chia-ming.Cyclic performance ofa type of steel beam to steel-encased reinforced concretecolumn moment connection[J].Journal of ConstructionalSteel Research,2002,58(1):637-663.
[8]杨勇,郭子雄,薛建阳.型钢混凝土粘结滑移性能试验研究[J].建筑结构学报,2005,26(4):1-9.Yang Yong,Guo Zi-xiong,Xue Jian-yang.Experimentstudy on bond slip behavior between section steel andconcrete in SRC structures[J].Journal of Building Struc-tures,2005,26(4):1-9.
[9]李忠献,张雪松,丁阳.装配整体式型钢混凝土框架节点抗震性能研究[J].建筑结构学报,2005,26(4):32-38.Li Zhong-xian,Zhang Xue-song,Ding Yang.Seismic be-havior of joints of prefabricated steel reinforced concreteintegral frame[J].Journal of Building Structures,2005,26(4):32-38.
[10]刘永明,张晔江,陈以一.焊接热影响区断裂性能试验研究[J].力学季刊,2002,23(2):157-163.LiuYong-ming,ZhangYe-jiang,Ceng Yi-yi.Experimental re-search on fracture performance in weld heat-affect zone[J].Chinese Quarterly of Mechanics,2002,23(2):157-163.
[11]李国强,孙飞飞,沈祖炎.强震下钢框架梁柱焊接连接的断裂行为[J].建筑结构学报,1998,19(4):19-28.Li Guo-qiang,Sun Feifei,Shen Zuyan.Fracture behaviorof welded beam-to-column connections of steel momentframes under severe earthquake[J].Journal of BuildingStructures,1998,19(4):19-27.
[2]Parra-Montesinos G,Wight J K.Modeling shear behaviorof hybrid RCS beam-column connections[J].Journal ofStructural Engineering,ASCE,2001,127(1):3-11.
[3]Parra-Montesinos G,Liang X.Towards deformation-basedcapacity design of RCS beam-column connections[J].Engineering Structures,2003,25(5):681-690.
[4]Kanno R,Deierlein G G.Seismic behavior of composite(RCS)beam-column joint subassemblies[C]∥Procee-dings of the 1996 Engineering Foundation Conference onComposite Construction in Steel and Concrete III.Irsee:[s.n.],1996:236-249.
[5]薛建阳,赵鸿铁.型钢混凝土节点抗震性能及构造方法[J].世界地震工程,2002,18(2):61-64.Xue Jian-yang,Zhao Hong-tie,Yang Yong.Seismic beha-vior and construction method of steel reinforced concretejoints[J].World Earthquake Engineering,2002,18(2):61-64.
[6]Nestor I,Sergio Z.Steel moment frames resolution of re-cent seismic detailing and material shape issues[J].Journal of Constructional Steel Research,2002,58(1):495-510.
[7]Chou Chung-che,Uang Chia-ming.Cyclic performance ofa type of steel beam to steel-encased reinforced concretecolumn moment connection[J].Journal of ConstructionalSteel Research,2002,58(1):637-663.
[8]杨勇,郭子雄,薛建阳.型钢混凝土粘结滑移性能试验研究[J].建筑结构学报,2005,26(4):1-9.Yang Yong,Guo Zi-xiong,Xue Jian-yang.Experimentstudy on bond slip behavior between section steel andconcrete in SRC structures[J].Journal of Building Struc-tures,2005,26(4):1-9.
[9]李忠献,张雪松,丁阳.装配整体式型钢混凝土框架节点抗震性能研究[J].建筑结构学报,2005,26(4):32-38.Li Zhong-xian,Zhang Xue-song,Ding Yang.Seismic be-havior of joints of prefabricated steel reinforced concreteintegral frame[J].Journal of Building Structures,2005,26(4):32-38.
[10]刘永明,张晔江,陈以一.焊接热影响区断裂性能试验研究[J].力学季刊,2002,23(2):157-163.LiuYong-ming,ZhangYe-jiang,Ceng Yi-yi.Experimental re-search on fracture performance in weld heat-affect zone[J].Chinese Quarterly of Mechanics,2002,23(2):157-163.
[11]李国强,孙飞飞,沈祖炎.强震下钢框架梁柱焊接连接的断裂行为[J].建筑结构学报,1998,19(4):19-28.Li Guo-qiang,Sun Feifei,Shen Zuyan.Fracture behaviorof welded beam-to-column connections of steel momentframes under severe earthquake[J].Journal of BuildingStructures,1998,19(4):19-27.
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