Discussion of system intrinsic parameters of tuned mass dampers used for seismic response reduction

被引:19
|
作者
Miranda, Julio C. [1 ]
机构
[1] CH2M Hill Inc, San Jose, CA 95112 USA
来源
STRUCTURAL CONTROL & HEALTH MONITORING | 2016年 / 23卷 / 02期
关键词
passive control; energy dissipation; seismic design; tuned mass dampers; building technology;
D O I
10.1002/stc.1775
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Assimilating the structures incorporating tuned mass dampers to 2-degrees-of-freedom mechanical systems, this paper discusses the salient parameters defining the efficiency of these devices when affixed to structures for the purpose of seismic response reduction. Focusing on parameters that are intrinsic to the mechanical systems and independent of ground motions, numerical and analytical expressions are first obtained for the modal damping of the systems. Subsequently, it is proposed that the highest efficiency in terms of modal damping allocation is achieved at tuning that results in modal damping that is in the same proportion as the participation factors for the modes. Further, some properties of the frequencies, tuning, and participation factors are analytically demonstrated. Finally, limited numerical calculations using a spectrum-compatible accelerogram are offered to support the proposed method for modal damping allocation. Copyright (c) 2015 John Wiley & Sons, Ltd.
引用
收藏
页码:349 / 368
页数:20
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