放大阻尼支腿在高层建筑抗震设计中的应用

Hongjing Xue, Zibin Zhao, Pei Li, Weinong Shu, Yu Guan, Dongdong He, Dong Wei, Jincheng Song
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引用次数: 0

摘要

支腿技术的应用有效提高了建筑物的侧向刚度,减少了有害变形,增强了结构的抗震能力,促进了高层建筑的快速发展。为了提高粘滞阻尼支腿在地震激励下的响应速度和耗能能力,提出了一种带放大器的粘滞阻尼支腿,并结合 8.5 度烈度区 149.2 米高层建筑的抗震设计验证了其有效性。为确定建筑结构的附加阻尼比,采用规范法和能量比法进行了研究,以评估阻尼支腿的贡献。研究了阻尼支腿等效刚度确定方法,并将简化的工程计算方法与精细的有限元分析结果进行了比较,以便进行工程设计。粘滞阻尼支腿中的位移放大技术可以提高阻尼器的响应速度,增加阻尼支腿系统的能量耗散。在工程中应用增大阻尼支腿可增加约 1%的阻尼比,同时简化基于附加阻尼和等效阻尼器切线刚度的计算方法,这在工程设计中非常有用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Application of amplified damped outrigger in seismic design of high-rise buildings
The application of the outrigger technology effectively improves the lateral stiffness of buildings, reduces harmful deformation, enhances the seismic resistance of structures, and contributes to the rapid development of high-rise buildings. To improve the response speed and energy dissipation of a viscous damping outrigger under seismic excitation, a viscous damping outrigger with an amplifier was proposed, and its effectiveness was verified by combining it with the seismic design of a 149.2 m high-rise building in an 8.5-degree intensity area. To determine the additional damping ratio of the building structure, investigations were carried out using both the code method and energy ratio method to evaluate the contribution of the damping outrigger. The damped outrigger equivalent stiffness determination method was studied, and the simplified engineering calculation method was compared against the refined finite element analysis results for engineering design purposes. The displacement amplification technique incorporated into the viscously damped outrigger can enhance the damper response speed, and increase the energy dissipation of the damped outrigger system. The application of an enlarged damped outrigger in engineering can result in an additional damping ratio of approximately 1% while simplifying the calculation method based on the additional damping and equivalent damper cut-line stiffness, which can be useful in engineering design.
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