组合隔震系统力学性能试验研究
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摘要
在建筑物和基础之间设置滑板支座或铅芯橡胶支座,都能起到隔震作用,而且前者隔震效果更明显。如果将两种支座按一定比例组合在一起,承担结构的竖向荷载,可以形成一种组合隔震系统。通过对安装组合隔震系统的模型进行低周反复加载试验,研究这种组合隔震系统的力学性能。分析了在3种不同竖向荷载作用下,滑板和橡胶支座的比例分别为1/4、1/3和1/2的9个工况下的水平滞回曲线和骨架曲线。试验结果表明:组合隔震系统有良好的耗能能力,并且,在橡胶支座能够提供足够回复力的前提下,滑板支座越多,隔震效果越好,系统的耗能能力越强。并通过对滞回曲线的分析,给出了组合系统简化恢复力模型,为安装该系统的隔震建筑的计算分析提供参考。
The sliding or lead rubber bearing between the upper structure and the foundation could isolate the seismic vibration,and the former is more effective.The sliding and lead rubber bearing can be combined in some way to resist the vertical loads,so that a new type of combined seismic isolation system is formed.In this research,the mechanical properties of the combined seismic isolation system were investigated.Three groups of models with combined seismic isolation systems were designed and the bearing ratio of the sliding and lead rubber bearing was 1/4,1/3 and 1/2.Under three types of vertical loading,low cycle loading tests in horizontal direction were carried out.The test results show that the new system has better energy dissipation capacity.In addition,if the rubber could bear enough vertical loading,the system has better performance with more sliding fraction.The restoring force models of the combined seismic isolation system have been presented in this paper by analyzing the hysteretic loops,and the results are very useful for the analyzing of the structures with the new system.
The sliding or lead rubber bearing between the upper structure and the foundation could isolate the seismic vibration,and the former is more effective.The sliding and lead rubber bearing can be combined in some way to resist the vertical loads,so that a new type of combined seismic isolation system is formed.In this research,the mechanical properties of the combined seismic isolation system were investigated.Three groups of models with combined seismic isolation systems were designed and the bearing ratio of the sliding and lead rubber bearing was 1/4,1/3 and 1/2.Under three types of vertical loading,low cycle loading tests in horizontal direction were carried out.The test results show that the new system has better energy dissipation capacity.In addition,if the rubber could bear enough vertical loading,the system has better performance with more sliding fraction.The restoring force models of the combined seismic isolation system have been presented in this paper by analyzing the hysteretic loops,and the results are very useful for the analyzing of the structures with the new system.
引文
[1]Kawamuras S,Sugisaki R,Ogura K,et al.Seismic isola-tion retrofit in Japan[C]//The 12thworld conference onearthquake engineering.Oakland,CA:EarthquakeEngineering Research Institute,2000.
[2]Kelly J M.Aseismic base isolation:Reviewand bibliogr-aphy[J].Soil Dynamics and Earthquake Engineering,1986,5(4):202-216.
[3]Skinner R I.Seismic isolation in New Zealand[J].Nuclear Engineering and Design,1991,127(28):1-9.
[4]周福霖,工程结构减震控制[M].北京:地震出版社,1997
[5]周锡元,苏经宇,樊水荣.变摩擦滑移减震结构的动力分析[C]//第四届全国地震工程会议论文集.北京:中国地震学会:1994.
[6]周锡元,韩淼,曾德民,等.橡胶支座与RC柱串联系统水平刚度系数[J].振动工程学报,1999,12(2):157-165.
[7]周锡元,韩淼,李大望,等.并联与串联基础隔震体系地震反应的某些特征[J].工程抗震,1995,12(4):1-5.
[8]吕西林,朱玉华,施卫星,等.组合基础隔震房屋模型振动台试验研究[J].土木工程学报,2001,34(2):43-49.
[9]朱玉华,吕西林.组合基础隔震系统地震反应分析[J].土木工程学报,2006.37(4):77-81.
[10]李爱群,毛利军.并联基础隔震体系地震反应特征与隔震层参数的优选[J].工程抗震与加固改造,2005,27(2):27-31.
[11]杨树标.复合隔震结构地震反应的简化计算[J].世界地震工程,2001,17(2):65-69.
[12]刘小煜,施卫星,徐磊.组合支座隔震结构及其动力反应分析[J].工程力学,2001,18(增刊):154-158.
[13]张迪,叠层橡胶支座基础隔震结构计算实用模型及工程应用[D],兰州:甘肃工业大学,2001.
[2]Kelly J M.Aseismic base isolation:Reviewand bibliogr-aphy[J].Soil Dynamics and Earthquake Engineering,1986,5(4):202-216.
[3]Skinner R I.Seismic isolation in New Zealand[J].Nuclear Engineering and Design,1991,127(28):1-9.
[4]周福霖,工程结构减震控制[M].北京:地震出版社,1997
[5]周锡元,苏经宇,樊水荣.变摩擦滑移减震结构的动力分析[C]//第四届全国地震工程会议论文集.北京:中国地震学会:1994.
[6]周锡元,韩淼,曾德民,等.橡胶支座与RC柱串联系统水平刚度系数[J].振动工程学报,1999,12(2):157-165.
[7]周锡元,韩淼,李大望,等.并联与串联基础隔震体系地震反应的某些特征[J].工程抗震,1995,12(4):1-5.
[8]吕西林,朱玉华,施卫星,等.组合基础隔震房屋模型振动台试验研究[J].土木工程学报,2001,34(2):43-49.
[9]朱玉华,吕西林.组合基础隔震系统地震反应分析[J].土木工程学报,2006.37(4):77-81.
[10]李爱群,毛利军.并联基础隔震体系地震反应特征与隔震层参数的优选[J].工程抗震与加固改造,2005,27(2):27-31.
[11]杨树标.复合隔震结构地震反应的简化计算[J].世界地震工程,2001,17(2):65-69.
[12]刘小煜,施卫星,徐磊.组合支座隔震结构及其动力反应分析[J].工程力学,2001,18(增刊):154-158.
[13]张迪,叠层橡胶支座基础隔震结构计算实用模型及工程应用[D],兰州:甘肃工业大学,2001.
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