不同方向水平力下多腔钢管混凝土巨型柱抗震性能研究
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摘要
提出了一种异形截面的多腔钢管混凝土巨型柱,研究了其在不同方向水平力作用下的抗震性能。进行了6个1/25缩尺的巨型柱模型在竖向荷载和不同方向水平反复荷载作用下的抗震性能试验研究,其中:2个试件的水平力沿截面长轴方向施加,2个试件的水平力沿截面短轴方向施加,2个试件的水平力沿与长轴及短轴呈45度方向施加,3种水平力加载方向的试件轴压比分别为0.5、0.25。基于试验结果,分析了各试件的承载力、刚度及其退化过程、延性、滞回特性、耗能和破坏特征。进行了数值模拟分析,计算结果与试验符合较好。研究表明,提出的异形截面多腔钢管混凝土巨型柱有良好的抗震性能,且其抗震性能与水平力作用方向相关。
A multi-cell concrete-filled still tube(CFST) mega-column with special shaped section was proposed,and its seismic behavior under horizontal forces in different direction was researched.The experimental research on seismic behavior of six 1/25 scaled multi-cell CFST mega-column models was carried out under vertical loading,as well as the horizontal low cyclic loading in different direction.The axial force ratio was 0.5 and 0.25.The horizontal load was applied along the long axis,the short axis,and in the direction of 45° intersetion angle with long and short axes,respectively.The load-bearing capacity,stiffness and its degeneration,ductility,hysteretic properties,energy dissipation capacity,and failure characteristic of models were analyzed based on the experimental results.Numerical simulation analysis was also made,and the its results agree well with those from the test.The results show that the multi-cell CFST mega-column with special shaped section has good seismic behavior,and the behavior is relevant to the direction of horizontal forces action.
A multi-cell concrete-filled still tube(CFST) mega-column with special shaped section was proposed,and its seismic behavior under horizontal forces in different direction was researched.The experimental research on seismic behavior of six 1/25 scaled multi-cell CFST mega-column models was carried out under vertical loading,as well as the horizontal low cyclic loading in different direction.The axial force ratio was 0.5 and 0.25.The horizontal load was applied along the long axis,the short axis,and in the direction of 45° intersetion angle with long and short axes,respectively.The load-bearing capacity,stiffness and its degeneration,ductility,hysteretic properties,energy dissipation capacity,and failure characteristic of models were analyzed based on the experimental results.Numerical simulation analysis was also made,and the its results agree well with those from the test.The results show that the multi-cell CFST mega-column with special shaped section has good seismic behavior,and the behavior is relevant to the direction of horizontal forces action.
引文
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[2]徐礼华,杜国锋,徐浩然,等.组合T形截面钢管混凝土构件抗剪性能试验研究[J].工程力学,2009,26(12):142-149DU Guofeng,XU Lihua,XU Haoran,et al.Experimental study on shear resistance performance of composite t-section concrete-filled steel tu-bular members[J].Engineering Mechanics,2009,26(12):142-149.
[3]杜国锋,徐礼华,徐浩然.钢管混凝土组合T形短柱轴压力学性能研究[J].西安建筑科技大学学报,2008,40(4):549-555DU Guofeng,XU Lihua,XU Haoran,et al.Study on behavior of composite T-shaped concrete filled steel tubular short columns under axial com-pression[J].Journal of Xi an University of Architecture&Technology(Natural Science Edition),2008,40(4):549-555.
[4]左志亮,蔡健,朱昌宏.带约束拉杆L形钢管混凝土短柱的偏压试验研究[J].东南大学学报,2010,40(2):346-351.ZUO Zhiliang,CAI Jian,ZHU Changhong.Experimental research on L-shape CFT stub columns with binding bars subjected to eccentric com-pression[J].Journal of Southeast University,2010,40(2):346-351.
[5]林云峥.带约束拉杆十字形钢管混凝土柱轴压基本性能研究[D].广州:华南理工大学,2010.LIN Yunzheng.Research on the mechanical behavior of crisscross-shaped concrete-filled steel tube stub columns with binding bars[D].Guang-zhou:South China University of Technology,2010.
[6]曹万林,关美荣,王立长,等.多腔扁钢管混凝土斜折柱抗震性能试验研究[J].地震工程与工程振动,2011,31(5):39-42.CAO Wanlin,GUAN Meirong,WANG Lichang,et al.Experimental study on seismic performance of multi-cavity flat concrete filled steel tubecolumn with gambrel[J].Journal of Earthquake Engineering and Engineering Vibration,2011,31(5):39-42.
[7]中国工程建设标准化协会标准.CECS28:90.矩形钢管混凝土结构技术规程[S].北京:中国计划出版社,2004.CECS159:2004.Technical specification for structures with concrete-filled rectangular steel tube members[S].Beijing:China Planning Press,2004.
[8]丁发兴,余志武.钢管混凝土短柱力学性能研究:理论分析[J].工程力学,2005,22(1):175-181.DING Faxing,YU Zhiwu.Theoretical analysis of mechanical properties of concrete-filled tubular steel stub columns[J].Engineering Mechanics,2005,22(1):175-181.
[9]刘林林,屠永清,叶英华.基于ABAQUS的钢管混凝土L形柱有限元分析[J].沈阳工业大学学报,2011,33(3):349-354.LIU Linlin,TU Yongqing,YE Yinghua.Finite element analysis of L-shaped concrete filled steel tubular column based on ABAQUS[J].Journalof Shenyang University of Technology,2011,33(3):349-354.
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