摘要
一般而言,使用TMD减小结构风振有着很好的效果,但也有由于其频率过于敏感而引起的局限性。为了全面研究在高层结构上使用TMD减振的效果,从单自由度理论模型到实际的高层结构,分析了TMD的阻尼比、TMD能否抗震、TMD的频率敏感性等关键问题。结果表明,TMD的阻尼比不宜用于结构设计,且TMD也不宜用于抗震,而在结构层间使用阻尼器在风振和地震工况下均有良好的减振效果。另有结果表明,TMD对频率非常敏感,且TMD会在一定程度上不利于结构的扭转效应。
Generally speaking,using TMD to reduce wind-induced vibration of structures has an excellent effect.But there are also a lot of limitations due to the sensitiveness of frequency.To comprehensively study the damping effect of TMD,from SDOF to actual structure,some significant problem about TMD like damping ratio,whether can be used for earthquake,frequency sensitivity were discussed in this paper.Calculation results show that,the damping ratio of TMD can not be use for structural design,and it' s inadvisable to use TMD for earthquake while the dampers perform satisfactorily under wind or seismic excitation.Other results show that,TMD is supersensitive to frequency,and TMD may be against the torsion of the structure to a certain extent.
出处
《建筑结构》
CSCD
北大核心
2013年第S2期269-275,共7页
Building Structure
关键词
TMD
阻尼比
抗震
频率
扭转
TMD
damping ratio
seismic resistance
frequency
torsion
