Seismic control of tall buildings using vertically distributed multiple tuned mass dampers

Ali Akhlagh Pasand, S. M. Zahrai
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Abstract

Tuned mass damper (TMD) is a seismic vibration control device used to reduce wind and seismic vibrations of structures. Although TMD is attractive to many researchers due to its simplicity, optimizing its parameters and positions is very challenging. The sensitivity of TMD to structure's frequency changes is among its weaknesses and if parameters of this system are not optimally tuned, the efficiency of this system decreases. To solve this problem, multiple tuned mass dampers (MTMDs) have been proposed. In this research, in order to study and compare single tuned mass damper (STMD) with MTMDs vertically distributed according to modal analysis, a 20‐story building is used. The structure is analyzed in OpenSees under seven ground motions with a peak ground acceleration (PGA) of 1.0 g. To optimize TMD parameters, particle swarm optimization (PSO) algorithm is used and the results are compared to those obtained from Den Hartog's approach. To be able to use PSO algorithm and optimize TMD design parameters, Matlab and OpenSees are linked together. In this paper, more than one vibration mode is used to tune and distribute dampers to overcome higher mode effects in high‐rise buildings. The results showed that depending on their different layouts and different optimization methods used, MTMDs reduce the average maximum responses of the structure by up to 12.1%. This is while STMD is able to reduce maximum responses of the structure by 4.3%.
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利用垂直分布的多重调谐质量阻尼器对高层建筑进行抗震控制
调谐质量阻尼器(TMD)是一种地震振动控制装置,用于减少结构的风振和地震振动。尽管 TMD 因其简单易行而吸引了众多研究人员,但优化其参数和位置却非常具有挑战性。TMD 对结构频率变化的敏感性是其弱点之一,如果该系统的参数没有经过优化调整,其效率就会降低。为了解决这个问题,有人提出了多重调谐质量阻尼器(MTMD)。在本研究中,为了研究和比较单调谐质量阻尼器(STMD)和根据模态分析垂直分布的 MTMD,使用了一栋 20 层的建筑。该结构在 OpenSees 中分析了峰值地面加速度(PGA)为 1.0 g 的七种地面运动。为了优化 TMD 参数,使用了粒子群优化(PSO)算法,并将结果与 Den Hartog 方法得出的结果进行了比较。为了能够使用 PSO 算法并优化 TMD 设计参数,Matlab 和 OpenSees 被连接在一起。本文使用一种以上的振动模式来调整和分配阻尼器,以克服高层建筑中的高模态效应。结果表明,根据其不同的布局和所使用的不同优化方法,MTMDs 最多可将结构的平均最大响应降低 12.1%。而 STMD 能够将结构的最大响应降低 4.3%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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