基础隔震密肋复合墙结构的地震随机响应分析
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摘要
在给出密肋复合墙结构弹性刚度的基础上,建立了基础隔震结构的运动方程,利用随机振动的理论,将地震波过滤白噪声地震动模型输入,运用状态空间法,得出了层间最大位移的概率统计特性,从而建立了其均值和均方差的计算公式。通过算例分析表明,增大上部结构自振频率与隔震结构的频率的比值可以增大隔震层最大位移的反应,提高隔震层的阻尼比可以降低隔震层最大位移的反应;对其参数进行合理的配置,可使该结构体系隔震效果达到最优。
Based on the given equivalent elastic stiffness of multi-ribbed composite structure,the motion equations of a base isolation system are obtained.In accordance with the random vibration theory,the ground acceleration is described through the power spectral density function.Using the state space method,the statistical probabilistic characteristics of the maximum displacement response of the large bay multi-ribbed slab frame structure with base isolation are analyzed,and the calculating formula of displacement mean value and standard variation value are derived.The results of a calculation example indicate that the maximum displacement value of the isolation layer will increase with the increasing,the ratio of the first frequancy of upper structure to the frequency of isolation structure,and the maximum displacement value of the isolation layer will reduce as the damping ratio of the isolation layer increases.By rationally selecting parameters,the isolation effectiveness of the structure can be optimized.
Based on the given equivalent elastic stiffness of multi-ribbed composite structure,the motion equations of a base isolation system are obtained.In accordance with the random vibration theory,the ground acceleration is described through the power spectral density function.Using the state space method,the statistical probabilistic characteristics of the maximum displacement response of the large bay multi-ribbed slab frame structure with base isolation are analyzed,and the calculating formula of displacement mean value and standard variation value are derived.The results of a calculation example indicate that the maximum displacement value of the isolation layer will increase with the increasing,the ratio of the first frequancy of upper structure to the frequency of isolation structure,and the maximum displacement value of the isolation layer will reduce as the damping ratio of the isolation layer increases.By rationally selecting parameters,the isolation effectiveness of the structure can be optimized.
引文
[1]姚谦峰,陈平,张荫,等.密肋壁板轻框结构节能住宅体系[J].工业建筑,2003,33(1):1-5.Yao Qianfeng,Chen Ping,Zhang Yin,et al.Study of energy-saving residential systemof multi-ribbed wall slab with light-weight outer frame[J].Industrial Construction,2003,33(1):1-5.
[2]张荫,姚谦峰,王阿萍.密肋壁板轻框结构隔震房屋模型振动台试验研究[J].工业建筑,2003,33(12):34-38.Zhang Yin,Yao Qianfeng,Wang Aping.Analysis of the shaking table test of the isolated house of multi-rib slab with light-weigh`t outer framestructure[J].Industrial Construction,2003,33(12):34-38.
[3]王建强,姚谦峰.基础隔震密肋壁板大开间结构地震反应分析[J].四川建筑科学研究,2005,31(4):91-94.Wang Jianqiang,Yao Qianfeng.Analysis of dynamic properties on large bay multi-ribbed slab frame structure with base isolated[J].SichuanBuilding Science,2005,31(4):91-94.
[4]Jangid R S.Performance of based isolation system for asymmetric building subjected to random excitation[J].Engineering Structures,1995,17(6):443-454.
[5]Palazzo B.Response of base isolated system to random excitation[J].European Earthquake Engineering,1996,10(2):751-767.
[6]江宜城,唐家祥.基础隔震结构对随机激励的响应分析[J].世界地震工程,2002,18(2):39-42.Jiang Yicheng,Tang Jiaxiang.Response of a base-isolated building under random excitation[J].World Earthquake Engineering,2002,18(2):39-42.
[7]王建强,姚谦峰.密肋复合墙板变形与刚度分析[J].工程力学,2001(增刊):378-382.Wang Jianqiang,Yao Qianfeng.The analysis of stiffness and deformation that multi-ribbed composite wall[J].Engineering Mechanics(sup.)2001:378-382.
[8]Skinner R I.工程隔震概论[M].北京:地震工程出版社,1996.Skinner R I.Introduction to Engineering Isolation[M].Beijing:Earthquake Press,1996.
[9]Constantinous MC,Tadjbakhsh I G.Hysteretic dampers in base isolation:random approach[J].Journal of Structural Engineering,ASCE,1985,111(4):705-721.
[10]李桂青,曹宏,李秋胜,等,结构动力可靠性理论及其应用[M].北京:地震出版社,1993.Li Guiqing,Cao Hong,Li Qiusheng,et al.Dynamic Structural Reliability Theory and Its Application[M].Beijing:Earthquake Press,1993.
[2]张荫,姚谦峰,王阿萍.密肋壁板轻框结构隔震房屋模型振动台试验研究[J].工业建筑,2003,33(12):34-38.Zhang Yin,Yao Qianfeng,Wang Aping.Analysis of the shaking table test of the isolated house of multi-rib slab with light-weigh`t outer framestructure[J].Industrial Construction,2003,33(12):34-38.
[3]王建强,姚谦峰.基础隔震密肋壁板大开间结构地震反应分析[J].四川建筑科学研究,2005,31(4):91-94.Wang Jianqiang,Yao Qianfeng.Analysis of dynamic properties on large bay multi-ribbed slab frame structure with base isolated[J].SichuanBuilding Science,2005,31(4):91-94.
[4]Jangid R S.Performance of based isolation system for asymmetric building subjected to random excitation[J].Engineering Structures,1995,17(6):443-454.
[5]Palazzo B.Response of base isolated system to random excitation[J].European Earthquake Engineering,1996,10(2):751-767.
[6]江宜城,唐家祥.基础隔震结构对随机激励的响应分析[J].世界地震工程,2002,18(2):39-42.Jiang Yicheng,Tang Jiaxiang.Response of a base-isolated building under random excitation[J].World Earthquake Engineering,2002,18(2):39-42.
[7]王建强,姚谦峰.密肋复合墙板变形与刚度分析[J].工程力学,2001(增刊):378-382.Wang Jianqiang,Yao Qianfeng.The analysis of stiffness and deformation that multi-ribbed composite wall[J].Engineering Mechanics(sup.)2001:378-382.
[8]Skinner R I.工程隔震概论[M].北京:地震工程出版社,1996.Skinner R I.Introduction to Engineering Isolation[M].Beijing:Earthquake Press,1996.
[9]Constantinous MC,Tadjbakhsh I G.Hysteretic dampers in base isolation:random approach[J].Journal of Structural Engineering,ASCE,1985,111(4):705-721.
[10]李桂青,曹宏,李秋胜,等,结构动力可靠性理论及其应用[M].北京:地震出版社,1993.Li Guiqing,Cao Hong,Li Qiusheng,et al.Dynamic Structural Reliability Theory and Its Application[M].Beijing:Earthquake Press,1993.
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