摆式电涡流TMD-钢框架结构的耦合计算方法与减震分析
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作者单位:

1.西南交通大学土木工程学院;2.中南大学土木工程学院

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中图分类号:

TU391

基金项目:

四川省科技计划资助项目(2019YJ0222), 国家科技部资助项目(KY201801005)


Coupling calculation method and seismic analysis ofpendulum eddy current TMD-steel frame structures
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1.Southwest Jiaotong University;2.School of Civil Engineering, Central South University

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    摘要:

    摆式电涡流TMD作为一种新型阻尼器,多用于人致振动和风振控制,较少应用抗震工程,也缺乏较好的计算方法。为研究摆式电涡流TMD的减震性能及合理的质量比μm,根据摆式电涡流TMD的力学特性,提出了一种基于联合仿真的耦合计算方法,根据现行建筑抗震设计规范,建立了20层钢框架结构模型,设计了5组不同μm的摆式电涡流TMD,并采用提出的耦合计算方法,对摆式电涡流TMD-钢框架结构模型进行了动力时程分析,得到了罕遇地震作用下结构的层位移、层间位移角、层剪力和层加速度与μm的关系曲线,并与无TMD结构的地震响应进行了对比。研究结果表明:所提出的耦合计算方法可行有效,摆式电涡流TMD可有效降低钢框架结构的地震响应,当μm为3%时较为合理,其结构的层位移、层间位移角、层剪力和层加速度分别减小35.6%、31.2%、9.9%、5.6%。耦合计算方法为研究摆式电涡流TMD对建筑结构的减震效率提供了一种新的思路。

    Abstract:

    Pendulum eddy current TMD as a new type of damper is often used in the control of human-induced vibration and wind-induced vibration, but seldom used in seismic engineering. And there was still a lack of focus on calculation methods. In this paper, a coupling calculation method based on joint simulation is proposed to investigate the damping performance and reasonable value for mass ratio. A numerical model was established for a 20-story steel frame structure along with five groups of pendulum eddy current TMDs with different mass ratios, which conformed to the current Chinese code for seismic design of buildings and mechanical properties of pendulum eddy current TMD. A dynamic time-history analysis was performed on the numerical model by using coupling calculation method. The analysis yields a series of curves of story drift, interstory drift ratio, story shear force, and story acceleration versus mass ratio under rare earthquakes. The analysis results are compared to the results of the control model that had no pendulum eddy current TMD. The comparison shows the feasibility of the proposed coupling calculation method and that pendulum eddy current TMD can effectively reduce the seismic response of the steel frame, with a 35.6% reduction for story drift, 31.2% for interstory drift ratio, 9.9% for story shear force, and 5.6% for story acceleration when the reasonable mass ratio is recommended to be 3%. The coupling calculation method provides a novel way for investigating the damping efficiency of the pendulum eddy current TMD on building structures.

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历史
  • 收稿日期:2020-02-19
  • 最后修改日期:2020-04-11
  • 录用日期:2020-04-20
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