滚轴基础隔震的动力分析
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摘要
为了分析滚轴隔震结构在地震作用下的动力响应,在滑移隔震研究的基础上,针对滚轴纯滚动运动特点,推导出了滚轴隔震结构的动力方程.对某一工程实例采用滚轴隔震的方法,进行了在El-Centro地震波作用下的数值模拟仿真,并分析了隔震结构的峰值加速度、相对位移、基底位移和基底残余位移等.结果表明:滚轴隔震能有效地减缓上部结构在强震时的响应.当滚动摩阻系数大于0.15 cm时可以不施加限位装置,滚动摩阻系数越小,上部结构的加速度和层间位移越小,进一步减缓上部结构“鞭梢效应”的效果越明显.
The seismic responses of multi-storey shear type buildings isolated by rolling rods were studied.Through taking the characteristics of pure rolling into account based on the sliding isolation,the equation of rolling isolation was proposed.The responses of the rolling isolation structure were compared with the corresponding fixed base structure in order to investigate the effectiveness of the rolling rods.The results demonstrate that the method of rolling rods is effective in reducing the response of the super-structure against strong earthquake excitation.When the rolling friction coefficient is great than 0.15 cm,the limited device can be cancelled.The effectiveness of the rolling rods in reducing the seismic response of the structure decreases with an increase in the rolling friction coefficient.In addition,the storey-shift and whip-tip effect of the upper-structure become unremarkable with decreasing the rolling friction coefficient.
The seismic responses of multi-storey shear type buildings isolated by rolling rods were studied.Through taking the characteristics of pure rolling into account based on the sliding isolation,the equation of rolling isolation was proposed.The responses of the rolling isolation structure were compared with the corresponding fixed base structure in order to investigate the effectiveness of the rolling rods.The results demonstrate that the method of rolling rods is effective in reducing the response of the super-structure against strong earthquake excitation.When the rolling friction coefficient is great than 0.15 cm,the limited device can be cancelled.The effectiveness of the rolling rods in reducing the seismic response of the structure decreases with an increase in the rolling friction coefficient.In addition,the storey-shift and whip-tip effect of the upper-structure become unremarkable with decreasing the rolling friction coefficient.
引文
[1]武田寿一.建筑物隔震防振与控振[M].北京:中国建筑工业出版社,1997.(WUTIAN Shou-yi.Quakeproof,control-quake andisolation of building[M].Beijing:China Architectureand Building Press,1997.)
[2]李黎,樊爱武,孙红虎.滑移隔震结构滑移位移的数值研究[J].工程抗震与加固改造,2004(6):30-34.(LI Li,FAN Ai-wu,SUN Hong-hu.Numerical studyon sliding displacement of sliding-isolated structure[J].Earthquake Resistant Engineering andRetrofitting,2004(6):30-34.)
[3]李永贵,白良,沈冰.滑移隔震结构的动力反应分析[J].佳木斯大学学报:自然科学版,2005,23(3):424-426,442.(LI Yong-gui,BAI Liang,SHEN Bing.Dynamic reac-tion analysis of sliding isolated structures[J].Journalof Jiamusi University:Natural Science Edition,2005,23(3):424-426,442.)
[4]毛利军,李爱群.基于SIMULINK的基础滑移隔震结构仿真计算分析[J].东南大学学报:自然科学版,2002,32(5):804-808.(MAO Li-jun,LI Ai-qun.Seismic simulation of a slid-ing structure based on SIMULINK[J].Journal ofSoutheast University:Natural Science Edition,2002,32(5):804-808.)
[5]樊剑,唐家祥.滑移隔震结构的动力特性及地震分析[J].土木工程学报,2000,33(4):11-16.(FAN Jan,TANG Jia-xiang.Dynamic characteristicsand seismic response of a sliding structure[J].ChinaCivil Engineering Journal,2000,33(4):11-16.)
[6]毛利军,李爱群.基础滑移隔震体系的地震反应谱[J].土木工程学报,2004,37(5):58-66.(MAO Li-jun,LI Ai-qun.Earthquake response spec-trum of sliding base seismic-isolation system[J].ChinaCivil Engineering Journal,2004,37(5):58-66.)
[7]干洪,高飞.建筑结构隔震体系的动力反应[J].合肥工业大学学报:自然科学版,2004,27(7):761-764.(GAN Hong,GAO Fei.Dynamic response of seismicisolated structures[J].Journal of Hefei University ofTechnology:Natural Science Edition,2004,27(7):761-764.)
[8]Vasant A,Matsagar,Jangid R S.Influence of isolatorcharacteristics on the response of base-isolated struc-tures[J].Engineering Structures,2004(6):1735-1749.
[9]Ivo C,Massimo M,Francesco V.Seismic response ofmulti-story building base-isolated by friction deviceswith restoring properties[J].Computers and Struc-tures,2003(81):2589-2599.
[10]Jangid R S.Stochastic seismic response of structuresisolated by rolling rods[J].Engineering Structures,2000,22:937-946.
[11]张天宇.建筑物整体平移中的动力分析[J].福州建设科技,1998(4):4-5.(ZHANG Tian-yu.Dynamic analysis of whole transla-tion of building[J].Journal of Fuzhou Building Scienceand Technology,1998(4):4-5.)
[2]李黎,樊爱武,孙红虎.滑移隔震结构滑移位移的数值研究[J].工程抗震与加固改造,2004(6):30-34.(LI Li,FAN Ai-wu,SUN Hong-hu.Numerical studyon sliding displacement of sliding-isolated structure[J].Earthquake Resistant Engineering andRetrofitting,2004(6):30-34.)
[3]李永贵,白良,沈冰.滑移隔震结构的动力反应分析[J].佳木斯大学学报:自然科学版,2005,23(3):424-426,442.(LI Yong-gui,BAI Liang,SHEN Bing.Dynamic reac-tion analysis of sliding isolated structures[J].Journalof Jiamusi University:Natural Science Edition,2005,23(3):424-426,442.)
[4]毛利军,李爱群.基于SIMULINK的基础滑移隔震结构仿真计算分析[J].东南大学学报:自然科学版,2002,32(5):804-808.(MAO Li-jun,LI Ai-qun.Seismic simulation of a slid-ing structure based on SIMULINK[J].Journal ofSoutheast University:Natural Science Edition,2002,32(5):804-808.)
[5]樊剑,唐家祥.滑移隔震结构的动力特性及地震分析[J].土木工程学报,2000,33(4):11-16.(FAN Jan,TANG Jia-xiang.Dynamic characteristicsand seismic response of a sliding structure[J].ChinaCivil Engineering Journal,2000,33(4):11-16.)
[6]毛利军,李爱群.基础滑移隔震体系的地震反应谱[J].土木工程学报,2004,37(5):58-66.(MAO Li-jun,LI Ai-qun.Earthquake response spec-trum of sliding base seismic-isolation system[J].ChinaCivil Engineering Journal,2004,37(5):58-66.)
[7]干洪,高飞.建筑结构隔震体系的动力反应[J].合肥工业大学学报:自然科学版,2004,27(7):761-764.(GAN Hong,GAO Fei.Dynamic response of seismicisolated structures[J].Journal of Hefei University ofTechnology:Natural Science Edition,2004,27(7):761-764.)
[8]Vasant A,Matsagar,Jangid R S.Influence of isolatorcharacteristics on the response of base-isolated struc-tures[J].Engineering Structures,2004(6):1735-1749.
[9]Ivo C,Massimo M,Francesco V.Seismic response ofmulti-story building base-isolated by friction deviceswith restoring properties[J].Computers and Struc-tures,2003(81):2589-2599.
[10]Jangid R S.Stochastic seismic response of structuresisolated by rolling rods[J].Engineering Structures,2000,22:937-946.
[11]张天宇.建筑物整体平移中的动力分析[J].福州建设科技,1998(4):4-5.(ZHANG Tian-yu.Dynamic analysis of whole transla-tion of building[J].Journal of Fuzhou Building Scienceand Technology,1998(4):4-5.)
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