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

Abstract

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.

Aeroelastic metastructure for simultaneously suppressing wind-induced vibration and energy harvesting under wind flows and base excitations

“…Wind-induced vibrations can cause serious damage to buildings, bridges, and offshore structures. There are many scenarios that require protection from wind-induced vibration, such as bridge collapses [1,2], skyscraper wind-resistance design [3,4], arm masts of traffic lights [5,6] and road signs [7,8], cranes [9,10], aerofoils [11,12], and more. Traditional solutions for passive vibration suppression primarily involve the use of tuned mass dampers [13,14], nonlinear energy sink [15,16], etc.…”