框架结构鞭梢效应的分析与讨论
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摘要
以多层框架结构为研究对象,详细分析了框架结构产生鞭梢效应的原因。当建筑物顶端附属结构的基本频率与结构的前某阶固有频率相同且与激振力频率相等时容易发生鞭梢效应。为避免“鞭梢效应”现象,运用矩阵位移法对结构的振动进行研究可通过适当调整结构的刚度或质量分布,增大突出物的基本频率与整体结构前某阶频率的差值,从而减弱鞭梢效应,而不能单纯的增强顶端突出物刚度或质量。
Aimed at multi-layer frame structure, this paper offers a detailed analysis of the whiplash effect which frame structures are subjected to. It is shown that whiplash effects are more likely to can occur when the fundamental frequency of prominent parts equals to a natural frequency of the entire structure containing main parts and prominent parts, and the influence of the whiplash effect will be more obvious if this frequency nearly equals to the earthquake frequency. The influence of the whiplash effect can be avoided by using the displacement law of matrix to carry on research into the vibration of the structure. The research involves adjusting stiffness and mass of the structure by dynamic computation, increasing the stiffness and mass of prominent parts and enlarging the difference between prominent parts and the entire structure to reduce the influence of the whiplash effect.
Aimed at multi-layer frame structure, this paper offers a detailed analysis of the whiplash effect which frame structures are subjected to. It is shown that whiplash effects are more likely to can occur when the fundamental frequency of prominent parts equals to a natural frequency of the entire structure containing main parts and prominent parts, and the influence of the whiplash effect will be more obvious if this frequency nearly equals to the earthquake frequency. The influence of the whiplash effect can be avoided by using the displacement law of matrix to carry on research into the vibration of the structure. The research involves adjusting stiffness and mass of the structure by dynamic computation, increasing the stiffness and mass of prominent parts and enlarging the difference between prominent parts and the entire structure to reduce the influence of the whiplash effect.
引文
[1]钟万勰,林家浩.高层建筑振动的“鞭梢效应”[J].振动与冲击,1985290-96.
[2]王肇民.高耸结构振动控制[M].上海:同济大学出版社,1997.
[3]刘铁林.鞭梢效应成因的精确分析及减震作用的分析[J].辽宁工学院学报,1992,12435-38.
[4]黄建文,赵斌,高兑现.基础隔震对结构鞭梢效应的控制作用[J].西安矿业学院学报.1999193212-216.
[5]张加庆,田刚.建筑结构震动中的“鞭梢效应”分析[J].高原地震.2000,12457-59.
[6]林家浩.计算结构动力学[M].北京高等教育出版社1990.
[7]GBJ11_89,建筑抗震设计规范[S].
[8]阎石,李宏男,张景玮.结构鞭梢效应及其在振动控制中的应用[J].沈阳建筑工程学院学报,199814:48-51.
[9]ERIKA,JOHNSONJRAMALLOCetal.Intelligentbaseisolationsystems[A].MASSIMOBOVENZI.Proc.of2ndWorldConf.onStruct.Control[C].KyotoJapanHeidelbergSpringer-verlag1998.367-376.
[10]CARLSONJDSPENCERBF.Magnetorheologicalfluiddampersscalabilityanddesignissuesforapplicationtody-namichazardmitigation[A].BERNARDJMARTIN.Pro-ceedingsofthe2ndinternationalworkshoponstructurealcon-trol[C].TokyoSpringer-verlag1996.99-109.
[2]王肇民.高耸结构振动控制[M].上海:同济大学出版社,1997.
[3]刘铁林.鞭梢效应成因的精确分析及减震作用的分析[J].辽宁工学院学报,1992,12435-38.
[4]黄建文,赵斌,高兑现.基础隔震对结构鞭梢效应的控制作用[J].西安矿业学院学报.1999193212-216.
[5]张加庆,田刚.建筑结构震动中的“鞭梢效应”分析[J].高原地震.2000,12457-59.
[6]林家浩.计算结构动力学[M].北京高等教育出版社1990.
[7]GBJ11_89,建筑抗震设计规范[S].
[8]阎石,李宏男,张景玮.结构鞭梢效应及其在振动控制中的应用[J].沈阳建筑工程学院学报,199814:48-51.
[9]ERIKA,JOHNSONJRAMALLOCetal.Intelligentbaseisolationsystems[A].MASSIMOBOVENZI.Proc.of2ndWorldConf.onStruct.Control[C].KyotoJapanHeidelbergSpringer-verlag1998.367-376.
[10]CARLSONJDSPENCERBF.Magnetorheologicalfluiddampersscalabilityanddesignissuesforapplicationtody-namichazardmitigation[A].BERNARDJMARTIN.Pro-ceedingsofthe2ndinternationalworkshoponstructurealcon-trol[C].TokyoSpringer-verlag1996.99-109.
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