带黏滞阻尼器腋撑钢筋混凝土框架结构抗震性能试验研究
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摘要
为研究黏滞阻尼器腋撑对钢筋混凝土框架结构抗震性能的影响,设计制作了带黏滞阻尼器腋撑的钢筋混凝土框架模型和普通框架模型各1榀,对其进行水平正弦稳态激励荷载作用下的抗震性能试验,研究了两榀框架的滞回特性、耗能能力以及关键测点应变等。试验结果表明:设置黏滞阻尼器腋撑框架的滞回曲线较普通框架饱满,结构的耗能能力及附加阻尼比显著提高;激振频率变化对两榀框架的滞回特性以及钢筋应变影响较小;设置黏滞阻尼器腋撑可较大幅度降低梁柱节点处的内力,延缓框架柱顶塑性铰的产生和发展,有效地保护梁柱节点,改善钢筋混凝土框架的抗震性能,但黏滞阻尼器腋撑加大了梁柱加腋处及柱脚的内力;带黏滞阻尼器腋撑钢筋混凝土框架和普通框架均为柱脚塑性铰发展严重而破坏。
In order to investigate the seismic performance of the reinforced concrete(RC) frame with viscous damper haunch braces(VDHB),a RC frame model with VDHB and a general RC frame model were designed and their seismic performances were studied experimentally subjected to sine waveform steady-state excitations.Seismic behavior such as hysteretic performance,energy dissipation capacity and reinforcement strain at key measuring points of these specimens were investigated.The investigation results indicate that compared with the general RC frame,hysteretic curves of the RC frame with VDHB are plumper and the energy dissipation capacity and the additional damping ratio are increased significantly.The excitation frequency has little influence on the hysteretic characteristics and reinforcement strain of frames.The beam-column joint internal forces of the RC frame with VDHB can be reduced greatly.The formation and development of the plastic hinges on the top of columns can be delayed,which can effectively protect the beam-column joint and improve the seismic performance of RC frames.But VDHB will increase the internal forces at the VDHB joint to beams and columns and at the bottom of columns.The failures of the RC frame with VDHB and general RC frame are both caused by the serious development of the plastic hinges at the bottom of the columns.
In order to investigate the seismic performance of the reinforced concrete(RC) frame with viscous damper haunch braces(VDHB),a RC frame model with VDHB and a general RC frame model were designed and their seismic performances were studied experimentally subjected to sine waveform steady-state excitations.Seismic behavior such as hysteretic performance,energy dissipation capacity and reinforcement strain at key measuring points of these specimens were investigated.The investigation results indicate that compared with the general RC frame,hysteretic curves of the RC frame with VDHB are plumper and the energy dissipation capacity and the additional damping ratio are increased significantly.The excitation frequency has little influence on the hysteretic characteristics and reinforcement strain of frames.The beam-column joint internal forces of the RC frame with VDHB can be reduced greatly.The formation and development of the plastic hinges on the top of columns can be delayed,which can effectively protect the beam-column joint and improve the seismic performance of RC frames.But VDHB will increase the internal forces at the VDHB joint to beams and columns and at the bottom of columns.The failures of the RC frame with VDHB and general RC frame are both caused by the serious development of the plastic hinges at the bottom of the columns.
引文
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[3]Morgen B,Kurama Y.A friction damper for post-tensioned precast concrete moment frames[J].PCIJournal,2004,49(4):112-133.
[4]周飞,蔡健,林焕彬,等.钢筋混凝土带腋撑框架结构的试验[J].武汉理工大学学报,2008,30(12):146-149.(Zhou Fei,Cai Jian,Lin Huanbin,et al.Reinforced concrete frame structure with diagonalmember[J].Journal of Wuhan University ofTechnology,2008,30(12):146-149.(in Chinese))
[5]蔡健,周飞,苏广群,等.带腋撑钢筋混凝土框架结构的力学性能[J].华南理工大学学报:自然科学版,2009,37(9):7-12.(Cai Jian,Zhou Fei,SuGuangqun,et al.Mechanical behavior of reinforcedconcrete frame structure with diagonal members[J].Journal of South China University of Technology:Natural Science Edition,2009,37(9):7-12.(inChinese))
[6]周云,吴从晓.灾后建筑加固耗能减震技术与方法[C]//汶川地震建筑震害调查与灾后重建分析报告.北京:中国建筑工业出版社,2008:375-382.(Zhou Yun,Wu Congxiao.Technology and method ofenergy dissipation retrofitting for post-disaster structure[C]//Destruction Investigation of Structure onWenchuan Earthquake and the Analysis Report for Post-disaster Reconstruction.Beijing:China Architecture&Building Press,2008:375-382.(in Chinese))
[7]周云,吴从晓,陈真,等.改进框架结构抗震性能的新途径和新方法[C]//地震工程与减轻地震灾害研讨会:纪念汶川地震一周年.北京:地震出版社,2009:375-382.(Zhou Yun,Wu Congxiao,Chen Zhen,et al.New ways and methods for improvement on the seismicperformance of frame structures[C]//Seminar onEarthquake Engineering and Mitigation for EarthquakeDisasters:First Anniversary for Wenchuan Earthquake.Beijing:Seismological Press,2009:375-382.(inChinese))
[8]尹庆利,张东海,周云.耗能腋撑钢筋混凝土框架结构减震分析[J].土木工程学报,2010,43(增刊1):235-242.(Yin Qingli,Zhang Donghai,Zhou Yun.Vibration reduction analysis of the new system ofreinforced concrete frame with energy dissipationhaunch braces[J].China Civil Engineering Journal,2010,43(Suppl.1):235-242.(in Chinese))
[9]GB 50010—2002混凝土结构设计规范[S].北京:中国建筑工业出版社,2002.(GB 50010—2002Code for design of concrete structures[S].Beijing:China Architecture&Building Press,2002.(inChinese))
[10]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))
[11]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 resistantbuilding[S].Beijing:China Architecture&BuildingPress,1997.(in Chinese))
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