钢筋混凝土深梁填充钢框架抗震性能试验
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摘要
为了使钢结构初始刚度能够在一定范围内渐变,且增加的构件安装或拆卸方便,设计一种新型的抗震加固结构体系即钢筋混凝土深梁。通过1个纯钢框架和2个缩尺混凝土深梁填充钢框架的水平低周反复荷载试验,得到内填混凝土深梁钢框架结构的滞回曲线。在试验的基础上,分析深梁对纯钢框架的承载能力、延性、滞回特性和耗能能力的影响。结果表明:内填深梁大幅度提高了钢框架的初始刚度和承载能力;试件的滞回曲线饱满且骨架曲线有明显的塑性流动阶段;钢框架的延性和耗能能力都得到增强,证明内填深梁钢框架结构抗震性能良好,因此,混凝土深梁可作为结构抗震设防的第一道防线,钢框架作为第二道防线。
To realize the modulation of initial stiffness of steel structure and make the structure easily be assembled and removed,reinforced concrete deep beam,i.e.,a new anti-seismic reinforcing structure,was introduced.By cyclic loading model test of one steel frame and two deep beam infilled steel frames,the hysteresis loops were obtained.Based on the experiment,effects of the deep beam on the load capacity,ductility,hysteretic property and energy-dissipation of the pure steel structure were analyzed.The results show that the deep beam enhances the initial stiffness and load capacity by a large margin,and the hysteresis loops are replete and the skeleton curves have apparent stage of plastic flow,and the ductility and energy dissipation capacity of the test pieces are enhanced.Therefore,the deep beam can be used as the first defense line of earthquake-resistance,and the steel frame can be used as the second.
To realize the modulation of initial stiffness of steel structure and make the structure easily be assembled and removed,reinforced concrete deep beam,i.e.,a new anti-seismic reinforcing structure,was introduced.By cyclic loading model test of one steel frame and two deep beam infilled steel frames,the hysteresis loops were obtained.Based on the experiment,effects of the deep beam on the load capacity,ductility,hysteretic property and energy-dissipation of the pure steel structure were analyzed.The results show that the deep beam enhances the initial stiffness and load capacity by a large margin,and the hysteresis loops are replete and the skeleton curves have apparent stage of plastic flow,and the ductility and energy dissipation capacity of the test pieces are enhanced.Therefore,the deep beam can be used as the first defense line of earthquake-resistance,and the steel frame can be used as the second.
引文
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[2]陈绍蕃,顾强.钢结构[M].北京:中国建筑工业出版社,2007:34-39.CHEN Shao-fan,GU Qiang.Steel structure[M].Beijing:China Architecture&Building Press,2007:34-39.
[3]刘大海,杨翠如.高楼钢结构设计[M].北京:中国建筑工业出版社,2004:20-25.LIU Da-hai,YANG Cui-ru.Steel structure design of tall building[M].Beijing:China Architecture&Building Press,2004:20-25.
[4]米旭峰.带竖缝钢筋混凝土剪力墙的设计与构造研究[J].江苏科技大学学报:自然科学版,2009,23(5):387-390.MI Xu-feng.Design rules and constructional measures of RC slit walled system[J].Journal of Jiangsu University of Science and Technology:Natural Science Edition,2009,23(5):387-390.
[5]王恒,余安东,郝际平.带缝钢板剪力墙性能研究[J].钢结构,2007,22(9):70-72.WANG Heng,YU An-dong,HAO Ji-ping.Analysis on the behaviors of steel shear wall with slits[J].Steel Construction,2007,22(9):70-72.
[6]曹春华,郝际平,王迎春,等.开缝薄钢板剪力墙低周反复荷载试验研究[J].西安建筑科技大学学报:自然科学版,2008,40(1):46-52.CAO Chun-hua,HAO Ji-ping,WANG Ying-chun,et al.Cyclic test of thin steel plate shear wall with slits[J].Journal of Xi’an University of Architecture and Technology:Natural Science Edition,2008,40(1):46-52.
[7]郝际平,曹春华,王迎春,等.开洞薄钢板剪力墙低周反复荷载试验研究[J].地震工程与工程振动,2009,9(2):79-85.HAO Ji-ping,CAO Chun-hua,WANG Ying-chun,et al.Test on thin steel plate shear wall with opening under cyclic loading[J].Journal of Earthquake Engineering and Engineering Vibration,2009,9(2):79-85.
[8]缪友武,董全利,郭彦林.两侧边开缝钢板剪力墙弹性屈曲分析[J].钢结构,2007,22(9):95-98.MIU You-wu,DONG Quan-li,GUO Yan-lin.Elastic bucking behavior of steel plate shear walls slotted at two edges[J].Steel Construction,2007,22(9):95-98.
[9]郑宏,杨飞颖,张维刚.钢板深梁屈曲分析[J].建筑科学与工程学报,2007,24(3):31-34.ZHENG Hong,YANG Fei-ying,ZHANG Wei-gang.Buckling analysis on steel plate deep beam[J].Journal of Architecture and Civil Engineering,2007,24(3):31-34.
[10]ZHENG Hong,ZHOU Xu-hong.Parameter study of hysteretic behavior of steel beams in ANSYS[C]//JIANG Yong,LIU Kai.Proceedings of the Second International Conference on Modeling and Simulation.Manchester,England:World Academic Press,2009:91-96.
[11]Kahn L F,Hanson R D.Infilled walls for earthquake strengthening[J].J Struct Div ASCE,1979,105(2):283-296.
[12]Kesner K E.Development of seismic retrofit and strengthening strategies for critical facilities using engineered cementitious composite materials[D].Ithaca:The Ithaca Compus,Cornell University,School of Civil Engineering,2003:113-120.
[13]Kesner K,Billington S L.Investigation of infill panels made from engineered cementitious composites for seismic strengthening and retrofit[J].Journal of Structural Engineering,2005,131(11):1712-1720
[14]陶红林,刘甲铭.钢-混凝土组合结构住宅建筑体系技术经济分析[J].建筑经济,2007,30(12):110-111.TAO Hong-lin,LIU Jia-ming.Techno-economic analysis of steel-concrete composite structure[J].Construction Economy,2007,30(12):110-111.
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