高强钢组合Y形偏心支撑钢框架抗震性能试验研究
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摘要
高强钢组合Y形偏心支撑钢框架是耗能梁段采用较低屈服点钢材、其他构件采用高强钢的双重抗侧力结构体系。为研究其抗震性能,对4个1∶2缩尺的单层单跨高强钢组合Y形偏心支撑钢框架平面试件进行了单调和循环加载试验。根据耗能梁段长度将试件分为剪切屈服型和弯曲屈服型两类,分别研究了每类试件的破坏模式和主要抗震性能指标。研究结果表明,该结构耗能能力强、延性好,剪切屈服型试件的承载力比弯曲屈服型试件的高,延性也好于后者,相同位移下耗散的能量也较后者大。循环加载时,剪切屈服型试件的破坏集中于耗能梁段,此时钢框架基本处于弹性工作状态,残余变形较小,是一种有利于震后修复的双重抗侧力体系。
High strength steel composite Y-type eccentrically braced frame is a new dual resistance structural system,in which the link is made from steels with low yield strength and the others are made from high strength steel. In order to study the seismic behavior,four one-bay and one-story 1 /2 scaled plane specimens were tested under monotonic and cyclic loading respectively. According to the length of link,the specimens were classified into two group: flexural yielding and shear yielding. The failure modes and the main seismic behavior indices of specimens with various link lengths of energy disspation were analyzed. The results indicate that this new structural system is good at energy dissipation and ductility. The bearing capacity of shear yielding specimens is higher than flexural yielding specimens,the ductility of the former is better than the latter,and the energy absorbed in the former is bigger than the latter at the same displacement. In cyclic testing,the main failures of shear yielding specimens were concentrated at links,while the other parts of eccentrically braced frame kept in elastic status. This kind of structure is an excellent dual resistance system and easy to rehabilitate after earthquake.
High strength steel composite Y-type eccentrically braced frame is a new dual resistance structural system,in which the link is made from steels with low yield strength and the others are made from high strength steel. In order to study the seismic behavior,four one-bay and one-story 1 /2 scaled plane specimens were tested under monotonic and cyclic loading respectively. According to the length of link,the specimens were classified into two group: flexural yielding and shear yielding. The failure modes and the main seismic behavior indices of specimens with various link lengths of energy disspation were analyzed. The results indicate that this new structural system is good at energy dissipation and ductility. The bearing capacity of shear yielding specimens is higher than flexural yielding specimens,the ductility of the former is better than the latter,and the energy absorbed in the former is bigger than the latter at the same displacement. In cyclic testing,the main failures of shear yielding specimens were concentrated at links,while the other parts of eccentrically braced frame kept in elastic status. This kind of structure is an excellent dual resistance system and easy to rehabilitate after earthquake.
引文
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[2]于安林,赵宝成,李仁达,等.耗能段腹板高厚比对Y型偏心支撑钢框架滞回性能影响的试验研究[J].地震工程与工程振动,2009,29(6):143-148.(YU Anlin,ZHAO Baocheng,LI Renda,et al.Experimental study on effect of link beam web depth-thickness ratio on energy-dissipation of Y-shaped eccentrically braced steel frames[J].Journal of Earthquake Engineering and Engineering Vibration,2009,29(6):143-148.(in Chinese))
[3]施刚,王元清,石永久.高强度钢材轴心受压构件的受力性能[J].建筑结构学报,2009,30(2):92-97.(SHI Gang,WANG Yuanqing,SHI Yongjiu.Behavior of high strength steel columns under axial compression[J].Journal of Building Structures,2009,30(2):92-97.(in Chinese))
[4]Dubina D,Stratan A,Dinu F.Dual high-strength steel eccentrically braced frames with removable links[J].Earthquake Engineering&Structural Dynamics,2008,37(15):1703-1720.
[5]Dusicka P,Itani A,Buckle I.Cyclic behavior of shear links of various grades of plate steel[J].Journal of Structural Engineering,ASCE,2010,136(4):370-378.
[6]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—2010Code for seismic design of buildings[S].Beijing:China Architecture&Building Press,2010.(in Chinese))
[7]陈绍蕃.钢结构设计原理[M].北京:科学出版社,2005:18-20.(CHEN Shaofan.Principles of steel structure design[M].Beijing:Science Press,2005:18-20.(in Chinese))
[8]戴国欣,王飞,施刚,等.Q345与Q460结构钢材单调和循环加载性能比较[J].工业建筑,2012,42(1):13-17.(DAI Guoxin,WANG Fei,SHI Gang,et al.Comparison of monotonic and cyclic performances of structural steel Q345 and Q460[J].Industrial Construction,2012,42(1):13-17.(in Chinese))
[9]傅恒菁.建筑结构试验[M].北京:冶金工业出版社,1992:131-135.
[10]Park R.Ductility evaluation from laboratory and analytical testing[C]//Proceedings of the 9th World Conference on Earthquake Engineering.Tokyo-kyoto,Japan:IAEE,1988,8:605-616.
[11]段留省,苏明周,郝麒麟,焦培培.高强度钢组合K形偏心支撑钢框架抗震性能研究[J].建筑结构学报,2014,35(7):18-25.(DUAN Liusheng,SU Mingzhou,HAO Qilin,JIAO Peipei.Experimental study on seismic behavior of high strength steel composite K-type eccentrically braced frames[J].Journal of Building Structures,2014,35(7):18-25.(in Chinese))
[12]JGJ 101—1996建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997.(JGJ 101—1996Specification of testing methods for earthquake resistant building[S].Beijing:China Architecture&Building Press,1997.(in Chinese))
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