Monitor wind characteristics and wind‐induced responses of a skyscraper during two typhoons

• Published in: The structural design of tall and special buildings Vol. 31; no. 16
• Main Authors: Cao, Jixing, Xiong, Haibei, Qin, Xiaoming
• Format: Journal Article
• Language: English
• Published: Oxford Wiley Subscription Services, Inc 01.11.2022
• Subjects: Acceleration; Data analysis; Domain decomposition methods; Dynamic characteristics; dynamic performance; High rise buildings; Parameter identification; serviceability evaluation; Skyscrapers; Slenderness ratio; Stochasticity; Structural health monitoring; Subspace methods; Super high‐rise building; Turbulence intensity; typhoon; Typhoons; Wind; wind characteristics; Wind resistance; Wind speed
• ISSN: 1541-7794; 1541-7808
• DOI: 10.1002/tal.1975

Summary Skyscrapers are wind‐sensitive structures due to their large slenderness ratio and good flexibility. Understanding the wind characteristics and wind‐induced response from the actual data provides first‐hand information for wind resistance design. This paper reports the wind properties and dynamic performance of a 632 m high‐rise building in Shanghai during the passage of typhoons Jongdari and Rumbbia. Field measurements obtained from the structural health monitoring system include acceleration and wind speed. The data analysis of turbulence intensity, turbulence integral length, and gust factor are compared and discussed. For the identification of dynamic characteristics, the stochastic subspace method and enhanced frequency domain decomposition method are employed to identify the modal parameters. Besides, the comfort assessment using peak value and root mean square of accelerations is compared with different standards. Studying the wind characteristics during the passage of typhoons and their impact on high‐rise buildings in a metropolis is expected to gain an insight into the dynamic mechanism of high‐rise buildings and collect a database for wind resistance design in typhoon‐prone regions.