基础隔震结构考虑摆动的振动控制研究
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摘要
在基础隔震结构中,当上部结构层间刚度相对较小、垂直荷载较大,且采用的叠层橡胶垫的橡胶总厚度较大时,隔震支座不仅要产生水平变形,同时也会产生竖向变形,导致上部结构产生摆动.文中推导了基础隔震结构考虑摆动的运动和控制方程,分析研究了摆动对基础隔震结构的振动控制影响.研究结果表明:基础隔震结构的摆动对控制有一定影响;隔震层转动刚度、阻尼和上部结构垂直荷载对基础隔震结构考虑摆动的振动控制有明显影响.
Upper story rigidity of base isolated structures is smaller,and the isolated structure bears a bigger vertical load,a multi-story rubber pad is adopted,the total thickness of the rubber bearing is bigger and it has not only an obvious horizontal but also vertical displacements.It causes the upper storys to produce swing.The vibrations and the control equations of a base isolated structure with swing are derived,analyzes the swing's influences to the vibration-control of the base isolated structure are analyzed.The conclusions obtained from above analysis suggest that the swing may have some influences to the vibration-control of the isolated structures.The rotation rigidity and damping ratio of the base isolated structure and superstructural vertical load obviously influence the vibration-control of the base isolated structures with swing.
Upper story rigidity of base isolated structures is smaller,and the isolated structure bears a bigger vertical load,a multi-story rubber pad is adopted,the total thickness of the rubber bearing is bigger and it has not only an obvious horizontal but also vertical displacements.It causes the upper storys to produce swing.The vibrations and the control equations of a base isolated structure with swing are derived,analyzes the swing's influences to the vibration-control of the base isolated structure are analyzed.The conclusions obtained from above analysis suggest that the swing may have some influences to the vibration-control of the isolated structures.The rotation rigidity and damping ratio of the base isolated structure and superstructural vertical load obviously influence the vibration-control of the base isolated structures with swing.
引文
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[4]杨佑发,周福霖.隔震结构地震反应分析的实用计算方法[J].世界地震工程,2000,16(1):72-76.Yang Youfa,Zhou Fulin.A practical method for analysis of seismic response of base-isolated structures[J].World Earthquake Engineering,2000,16(1):72-76.
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[6]黄昆,邹立华,艾叶青.基于磁流变阻尼器的层间隔震结构半主动控制研究[J].世界地震工程,2006,22(3):142-147.Huang Kun,Zou Lihua.Study of story isolated structures with magnetorheological dampers by semi-active control[J].World Earthquake Engineer-ing,2006,22(3):142-147.
[7]邹立华,赵人达.组合隔震结构的振动控制研究[J].振动与冲击,2005,24(2):80-83.Zou Lihua,Zhao Renda.Study on vibration-control of combined isolated structures[J].Journal of Vibration and Shock,2005,24(2):80-83.
[8]赵林.结构振动半主动控制的实用性研究[J].工程抗震与加固改造,2005,27(2):32-39.Zhao Lin.Study on practicability of the structural vibration semi-active control technology[J].Earthquake Resistant Engineering and Retrofitting,2005,27(2):32-39.
[9]杨飕,欧进萍.基于瞬时最优算法的磁流变阻尼隔震结构半主动控制[J].世界地震工程,2003,19(2):145-150.Yang Yang,Ou Jinping.Based on instantaneous-optima-algorithm semi-active control of isolation structure with MR damper[J].World Earthquake Engineering,2003,19(2):145-150.
[10]Ramallo J C,Johnson E A,et al.Semi-active building base isolation[C]//American Control Conference,June2-4,1999:515-519.
[2]Palazzo B,Petto L.Response of base isolated system to random excitations[J].Beijing:European Earthquake Engineering,1996,10(2),225-235.
[3]邹立华,赵人达.土-基础相互作用隔震体系地震随机响应分析[J].计算力学报,2005,22(2):252-256.Zou Lihua,Zhao Renda.Analysis of the random responses to earthquake of the subsoil-base-interaction isolated system[J].Chinese Journal of Computational Mechanics,2005,22(2):252-256.
[4]杨佑发,周福霖.隔震结构地震反应分析的实用计算方法[J].世界地震工程,2000,16(1):72-76.Yang Youfa,Zhou Fulin.A practical method for analysis of seismic response of base-isolated structures[J].World Earthquake Engineering,2000,16(1):72-76.
[5]Kelly J M.Base isolation:Liner theory and design[J].Earthquake Spectra,1990,6(2).
[6]黄昆,邹立华,艾叶青.基于磁流变阻尼器的层间隔震结构半主动控制研究[J].世界地震工程,2006,22(3):142-147.Huang Kun,Zou Lihua.Study of story isolated structures with magnetorheological dampers by semi-active control[J].World Earthquake Engineer-ing,2006,22(3):142-147.
[7]邹立华,赵人达.组合隔震结构的振动控制研究[J].振动与冲击,2005,24(2):80-83.Zou Lihua,Zhao Renda.Study on vibration-control of combined isolated structures[J].Journal of Vibration and Shock,2005,24(2):80-83.
[8]赵林.结构振动半主动控制的实用性研究[J].工程抗震与加固改造,2005,27(2):32-39.Zhao Lin.Study on practicability of the structural vibration semi-active control technology[J].Earthquake Resistant Engineering and Retrofitting,2005,27(2):32-39.
[9]杨飕,欧进萍.基于瞬时最优算法的磁流变阻尼隔震结构半主动控制[J].世界地震工程,2003,19(2):145-150.Yang Yang,Ou Jinping.Based on instantaneous-optima-algorithm semi-active control of isolation structure with MR damper[J].World Earthquake Engineering,2003,19(2):145-150.
[10]Ramallo J C,Johnson E A,et al.Semi-active building base isolation[C]//American Control Conference,June2-4,1999:515-519.
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