实腹式型钢混凝土异形柱中框架抗震性能试验研究
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摘要
通过1榀两跨三层实腹式型钢混凝土(SRC)异形柱中框架的低周反复加载试验,观察其受力过程及破坏形态,分析其荷载-位移滞回曲线和骨架曲线、承载能力、层间位移角、延性、耗能以及刚度退化等力学特性。结果表明:实腹式SRC异形柱中框架属于典型的"强柱弱梁"结构,破坏机制为梁铰机制;滞回曲线饱满,破坏时结构整体位移延性系数均值达到5.5,等效黏滞阻尼系数达到0.249;抗倒塌能力强,极限弹塑性层间位移角约为1/39～1/13。实腹式SRC异形柱中框架总体上表现出良好的抗震性能,可以应用于高抗震设防烈度区的多高层建筑中。
Through the experimental study on the model of a two-bay and three-story middle frame consisting of reinforced concrete beams and solid steel reinforced concrete(SRC) special-shaped columns under low cyclic reversed loading,the failure process and pattern were observed.The mechanical behavior such as load-displacement hysteretic loops and skeleton curves,load carrying capacity,inter-story drift ratio,ductility,energy dissipation and stiffness degradation of the frame were analyzed.Test results show that the solid SRC middle frame with special-shaped columns is a typical strong column and weak beam structure.The failure mechanism is the beam-hinge mechanism.The hysteretic loops are a plump.As the frame fails,the average of the overall ductility factors is 5.5.The equivalent viscous damping coefficient is 0.249.The ultimate elasto-plastic story drift rotation is between 1/39 to 1/13,indicating a high level of collapse resistance.The solid SRC middle frame shows excellent seismic behavior,and can be adopted in the construction in high seismic fortification zones.
Through the experimental study on the model of a two-bay and three-story middle frame consisting of reinforced concrete beams and solid steel reinforced concrete(SRC) special-shaped columns under low cyclic reversed loading,the failure process and pattern were observed.The mechanical behavior such as load-displacement hysteretic loops and skeleton curves,load carrying capacity,inter-story drift ratio,ductility,energy dissipation and stiffness degradation of the frame were analyzed.Test results show that the solid SRC middle frame with special-shaped columns is a typical strong column and weak beam structure.The failure mechanism is the beam-hinge mechanism.The hysteretic loops are a plump.As the frame fails,the average of the overall ductility factors is 5.5.The equivalent viscous damping coefficient is 0.249.The ultimate elasto-plastic story drift rotation is between 1/39 to 1/13,indicating a high level of collapse resistance.The solid SRC middle frame shows excellent seismic behavior,and can be adopted in the construction in high seismic fortification zones.
引文
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[2]徐亚丰,刁晓征,郭健,等.十字形钢骨混凝土异形柱双向偏心受压试验[J].沈阳建筑大学学报:自然科学版,2009,25(1):100-105.(XU Yafeng,DIAOXiaozheng,GUO Jian,et al.Experimental study on thebiaxial eccentric pressure bearing capacity of cross-shaped steel reinforced concrete columns[J].Journal ofShenyang Jianzhu University:Natural Science,2009,25(1):100-105.(in Chinese))
[3]陈宗平,薛建阳,赵鸿铁,等.型钢混凝土异形柱抗震性能试验研究[J].建筑结构学报,2007,28(3):53-61.(CHEN Zongping,XUE Jianyang,ZHAOHongtie,et al.Experimental research on seismicbehavior of steel reinforced concrete special-shapedcolumns[J].Journal of Building Structures,2007,28(3):53-61.(in Chinese))
[4]薛建阳,刘义,赵鸿铁,等.型钢混凝土异形柱框架节点抗震性能试验研究[J].建筑结构学报,2009,30(4):69-77.(XUE Jianyang,LIU Yi,ZHAOHongtie,et al.Experimental study on seismic behaviorof steel reinforced concrete special-shaped column-beamjoints[J].Journal of Building Structures,2009,30(4):69-77.(in Chinese))
[5]GB 50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.(GB 50011—2010 Codefor seismic design of buildings[S].Beijing:ChinaArchitecture&Building Press,2010.(in Chinese))
[6]王铁成,张学辉,康谷贻.两种混凝土异形柱框架抗震性能试验对比[J].天津大学学报,2007,40(7):791-798.(WANG Tiecheng,ZHANG Xuehui,KANGGuyi.Experimental comparison of seismic behavior oftwo RC frames with specially shaped columns[J].Journal of Tianjin University,2007,40(7):791-798.(in Chinese))
[7]徐云扉,胡庆昌,陈玉峰,等.低周反复荷载下两跨三层钢筋混凝土框架受力性能的试验研究[J].建筑结构学报,1986,7(2):1-16.(XU Yunfei,HUQingchang,CHEN Yufeng,et al.The experimentalstudy of the behavior of a two-bay three-story RC frameunder cyclic loading[J].Journal of BuildingStructures,1986,7(2):1-16.(in Chinese))
[8]杨涛,张喜德.T形截面钢骨混凝土异形柱框架抗震性能[J].土木建筑与环境工程,2009,31(2):33-37.(YANG Tao,ZHANG Xide.Research on seismicbehavior of frame with T-shaped SRC columns[J].Journal of Civil,Architectural and EnvironmentalEngineering,2009,31(2):33-37.(in Chinese))
[9]王铁成,张学辉,赵海龙.纤维增强混凝土异形柱框架抗震性能的试验研究[J].地震工程与工程振动,2008,28(6):178-185.(WANG Tiecheng,ZHANGXuehui,ZHAO Hailong.Experimental study on seismicbehavior of RC frames with specially shaped columnsreinforced by fiber[J].Journal of EarthquakeEngineering and Engineering Vibration,2008,28(6):178-185.(in Chinese))
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