基于地震模型土-不规则建筑-AMTMD相互作用系统的最优性能
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摘要
基于地震模型下建立的土-不规则建筑-主动多重调谐质量阻尼器(AMTMD)相互作用系统的动力方程,定义AMTMD的最优参数准则为:设置AMTMD结构的最大平动和扭转角位移动力放大系数的最小值的最小化。定义AMTMD的有效性准则为:设置AMTMD结构的最大位移动力放大系数的最小值的最小化与未设置AMTMD结构的最大位移动力放大系数的比值。基于定义的二个准则,研究不规则建筑标准化偏心系数(NER)、扭转对侧向频率比(TTFR)、土对结构的刚度比(SRSS)和地震卓越频率系数(EDFR)对AMTMD最优频率间隔和有效性的影响,为软土地基不规则建筑的地震振动控制设计与实现提供参考。
Based on the developed dynamic equations of a soil-asymmetric structure-active multiple tuned mass dampers(AMTMD)interaction system considering a ground motion model,the optimal parameter criterion of the AMTMD was defined as minimizing the minimum values of the maximum translational and torsional displacement dynamic magnification factors(DMF)of the asymmetric structure with the AMTMD.The effective criterion of the AMTMD was selected as the ratio of the minimization of the minimum values of the maximum displacement DMF of the asymmetric structure with the AMTMD to the maximum displacement DMF of the asymmetric structure without the AMTMD.Employing the above defined criteria,the parametric studies on the influences of the normalized eccentricity ratio(NER),torsional to translational frequency ratio(TTFR),stiffness ratio of soil relative to structure(SRSS),and earthquake dominant frequency ratio(EDFR)of the soil-asymmetric structure interaction system on the optimum frequency spacing and effectiveness of the AMTMD were then carried out.Through the extensive numerical analysis,the suggestions obtained herein would be useful for the design and implementation of the earthquake reduction of asymmetric structures built on soft soil foundation.
Based on the developed dynamic equations of a soil-asymmetric structure-active multiple tuned mass dampers(AMTMD)interaction system considering a ground motion model,the optimal parameter criterion of the AMTMD was defined as minimizing the minimum values of the maximum translational and torsional displacement dynamic magnification factors(DMF)of the asymmetric structure with the AMTMD.The effective criterion of the AMTMD was selected as the ratio of the minimization of the minimum values of the maximum displacement DMF of the asymmetric structure with the AMTMD to the maximum displacement DMF of the asymmetric structure without the AMTMD.Employing the above defined criteria,the parametric studies on the influences of the normalized eccentricity ratio(NER),torsional to translational frequency ratio(TTFR),stiffness ratio of soil relative to structure(SRSS),and earthquake dominant frequency ratio(EDFR)of the soil-asymmetric structure interaction system on the optimum frequency spacing and effectiveness of the AMTMD were then carried out.Through the extensive numerical analysis,the suggestions obtained herein would be useful for the design and implementation of the earthquake reduction of asymmetric structures built on soft soil foundation.
引文
[1]Nishitani A,Inoue Y.Overview of the application of active/semiactive control to building structures in Japan[J].Earth-quake Engineering and Structure Dynamics,2001;30:349-362.
[2]Li Chunxiang,Liu Yanxia,Wang Zhaomin.Active multiple tuned mass dampers:a new control strategy[J].Journal of Structural Engineering,ASCE2003,129(7):972-977.
[3]李春祥,张丽卿.地震作用下不规则建筑AMTMD控制的动力特性-I:平动振动控制[J].振动与冲击,2007,26(8):44-49.
[4]李春祥,张丽卿.地震作用下不规则建筑AMTMD控制的动力特性-II:扭转振动控制[J].振动与冲击,2007,26(8):50-54.
[5]李春祥,韩兵康,张丽卿.地震作用下偏心结构最优ATMD控制的冲程评价[J].振动与冲击,2007,26(6):41-46.
[6]李春祥,瞿燕,王超,等.土-不规则建筑-ATMD相互作用系统动力特性的研究[J].振动与冲击,2008,27(9):26-31.
[7]Li Chunxiang,Yu Zhiqiang,Xiong Xueyu,et al.Active mul-tiple tuned mass dampers for asymmetric structures considering soil-structure interaction[J].An International Journal,Struc-tural Control and Health Monitoring,to be published in2009.
[2]Li Chunxiang,Liu Yanxia,Wang Zhaomin.Active multiple tuned mass dampers:a new control strategy[J].Journal of Structural Engineering,ASCE2003,129(7):972-977.
[3]李春祥,张丽卿.地震作用下不规则建筑AMTMD控制的动力特性-I:平动振动控制[J].振动与冲击,2007,26(8):44-49.
[4]李春祥,张丽卿.地震作用下不规则建筑AMTMD控制的动力特性-II:扭转振动控制[J].振动与冲击,2007,26(8):50-54.
[5]李春祥,韩兵康,张丽卿.地震作用下偏心结构最优ATMD控制的冲程评价[J].振动与冲击,2007,26(6):41-46.
[6]李春祥,瞿燕,王超,等.土-不规则建筑-ATMD相互作用系统动力特性的研究[J].振动与冲击,2008,27(9):26-31.
[7]Li Chunxiang,Yu Zhiqiang,Xiong Xueyu,et al.Active mul-tiple tuned mass dampers for asymmetric structures considering soil-structure interaction[J].An International Journal,Struc-tural Control and Health Monitoring,to be published in2009.
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