Wind-induced response and equivalent static wind load for base-isolated tall buildings

被引：0
|
作者：
Li Z. [1 ,2 ]
Huang G. [2 ]
Zhou Y. [3 ]
Yang Q. [2 ]
Yang X. [2 ]
机构：
[1] Institute for Smart City of Chongqing University in Liyang, Liyang
[2] School of Civil Engineering, Chongqing University, Chongqing
[3] School of Civil Engineering, Tongji University, Shanghai
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2024年 / 54卷 / 04期
关键词：
background factor; base isolation; equivalent static wind load; tall building; wind-induced response;
D O I：
10.3969/j.issn.1001-0505.2024.04.007
中图分类号：
学科分类号：
摘要：
Based on the wind load code for tall buildings,the equation of motion of the base-isolated tall building under wind load was established,and the root mean squares of structural wind-induced responses were derived. Taking three base-isolated tall buildings with different heights as study cases,the dynamic characteristics and along-wind responses of buildings before and after isolation were investigated. Similar to the formula for the equivalent static wind load (ESWL)of the fixed-base buildings,the corresponding ESWL of the base-isolated buildings was proposed,where the simplified formula of wind-induced vibration factor was modified. The results show that the modal frequency and damping ratio of the isolated building with the elastic isolation layer are reduced,and a clear drift at the isolation layer in mode shape is observed. Consequently,the structural response increases obviously compared with the fixed-base building. The simplified formula of the background factor of base-isolated buildings can accurately estimate the wind-induced vibration factor and also can be used for the calculation of the acceleration. This study provides a reference for the checking calculation of the wind-induced vibration for base-isolated tall buildings in the elastic range. © 2024 Southeast University. All rights reserved.
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页码：852 / 860
页数：8
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