|Table of Contents|

Study on wind-induced effect of a 100 m level seismically isolated high-rise structure(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2023年02期
Page:
97-104
Research Field:
建筑结构
Publishing date:

Info

Title:
Study on wind-induced effect of a 100 m level seismically isolated high-rise structure
Author(s):
TAN Jiajun1; 2;  TAN Ping1; 2;  WU Jiurong1; 3;  FENG Demin4
(1. School of Civil Engineering, Guangzhou University, Guangzhou 510006, Guangdong, China; 2. Key Laboratory of Earthquake Resistance Earthquake Mitigation and Structural Safety of Ministry of Education, Guangzhou University, Guangzhou 510006, Guangdong, China; 3. Research Center for Wind Engineering and Engineering Vibration, Guangzhou University, Guangzhou 510006, Guangdong, China; 4. Technology Department Division of Fujita, Atsugi 243-0125, Kanagawa, Japan)
Keywords:
seismically isolated high-rise structure;  wind resistant design;  wind-induced effect;  wind stability;  wind vibration comfort;  numerical simulation
PACS:
TU352.1
DOI:
10.19815/j.jace.2021.11012
Abstract:
The static design method adopted in the current code may not consider the wind-induced effect of seismically isolated high-rise structure enough. Therefore, the wind resistant design and wind-induced effect of seismically isolated high-rise structure were deeply studied, the wind-induced effect analysis framework of seismically isolated high-rise structure combined with the current code was put forward, and the analysis and evaluation of wind-induced effect for a seismically isolated structure of 100 m level practical engineering was carried out. The results show that the code underestimates the fluctuating wind action on the seismically isolated high-rise structure by using the equivalent static method. Through the time history analysis of wind load, it is found that the horizontal shear force in X and Y directions of the seismic isolation increases by 23.8% and 27.7% respectively compared with the standard value of wind load, but from the point of view of design, the partial coefficient of 1.4 in the current code can meet the requirements of wind resistance stability of the seismic isolation. Under the 10-year wind load, there is a problem of comfort on the top of seismically isolated high-rise structure, and the maximum wind-induced acceleration reaches 16.2 cm?s-2, exceeding the limit of the code by 8%. Under the once-in-a-year wind load, the maximum wind-induced acceleration on the top of the seismically isolated high-rise structure reaches 7.6 cm?s-2, which is more difficult to meet the living comfort and the comfort of the seismically isolated high-rise structure should be paid attention to in the wind resistance design in the future. The proposed analysis framework can systematically and comprehensively reflect the wind-induced effect of seismically isolated high-rise structures, and can provide a theoretical reference for the current code.

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Last Update: 2023-03-20