Dynamic characteristics of novel energy-dissipation outrigger structure considering floor stiffness

被引：0
|
作者：
Chen L. [1 ]
Tan P. [2 ,3 ]
Xu Y. [1 ]
Zhao X. [1 ]
Zhou F. [1 ,2 ,3 ]
机构：
[1] College of Civil Engineering, Hunan University, Changsha
[2] Earthquake Engineering Research and Test Center, Guangzhou University, Guangzhou
[3] Key Laboratory of Earthquake Engineering and Applied Technology in Guangdong Province, Guangzhou
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2023年 / 42卷 / 15期
关键词：
damping ratio; dynamic characteristics; energy dissipation outrigger; floor stiffness; viscous damper;
D O I：
10.13465/j.cnki.jvs.2023.15.008
中图分类号：
学科分类号：
摘要：
A novel energy dissipation outrigger structure disconnects the outrigger from outer frame column node and vertically connects a viscous damper, it utilizes relative deformation energy between the two to obtain larger energy dissipation, and it has been applied in more and more high-rise buildings. Here, considering stiffness of ordinary floors, a simplified equivalent model for novel energy dissipation outrigger structure was proposed and compared with ETABS calculation results. Then, effects of floor stiffness, floor number, and floor beam span ratio on main mode damping ratio, frequency, and optimal damping coefficient of the overall structure were analyzed. The results showed that the simplified equivalent model agrees better with ETABS calculation results, the maximum error of additional damping ratio is 13%; after considering floor stiffness, additional damping ratio of the structure' s main vibration mode decreases and frequency increases; with decrease in floor beam stiffness, additional damping ratio increases, optimal damping ratio outrigger position moves upward and optimal damping coefficient increases; the equivalent formula proposed using the energy method can reflect effects of floor stiffness on dynamic characteristics of energy dissipation outrigger structure, simplify analysis process, and provide a theoretical basis for further engineering application of novel energy dissipation outrigger structures. © 2023 Chinese Vibration Engineering Society. All rights reserved.
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页码：55 / 64
页数：9
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