Wind tunnel tests on nonlinear energy sink for mitigating wind-induced responses of high-rise buildings

被引：0

作者：

Wang, Qinhua ^{[1
]}

Yang, Dongxu ^{[1
]}

Qiao, Haoshuai ^{[2
]}

Huang, Hanjie ^{[3
]}

Huang, Peng ^{[2
]}

机构：

[1] Southwest Univ Sci & Technol, Sch Civil Engn & Architecture, Mianyang 621000, Sichuan, Peoples R China

[2] Tongji Univ, State Key Lab Disaster Reduct Civil Engn, Shanghai 200092, Peoples R China

[3] China Aerodynam Res & Dev Ctr, Mianyang 621000, Sichuan, Peoples R China

来源：

STRUCTURES | 2024年 / 70卷

基金：

中国国家自然科学基金;

关键词：

Nonlinear energy sink; Vortex-induced vibration; Buffeting; Wind-induced vibration control; Wind tunnel tests; VORTEX-INDUCED VIBRATION;

D O I：

10.1016/j.istruc.2024.107677

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In order to study the control performance of Nonlinear Energy Sink (NES) on wind-induced vibration of high-rise buildings, including vortex-induced vibration (VIV) and buffeting, wind tunnel tests on the multi-degree-offreedom (MDOF) aeroelastic model of a high-rise building are conducted in the present work. The main mechanical components of NES include an auxiliary mass and a cubic nonlinear spring system built up by two linear springs. Four NESs having different auxiliary masses and stiffness coefficients are considered. Based on the windinduced acceleration of the scaled model measured in the wind tunnel tests, the vibration reduction effects of NES on VIV and buffeting are analyzed in the time and the time-frequency domains. Meanwhile, the influences of NES parameters on the vibration reduction effect are discussed. The test results show that both auxiliary mass and stiffness of NES have significant influences on its control performance. The maximum reduction ratios of 98.1 % and 34.1 % are achieved on the amplitude of acceleration responses on the top floor in VIV (at critical wind speed) and buffeting cases (at wind speed of 12 m/s), respectively.

引用

页数：12