Experimental study on wind-induced vibration and aerodynamic mitigation measures of a building over 800 meters

• Published in: Journal of Building Engineering 2022-04, Vol.46, p.103681, Article 103681
• Main Authors: Gu, Ming, Su, Linkun, Quan, Yong, Huang, Jian, Fu, Guoqiang
• Format: Article
• Language: English
• Subjects: Aerodynamic countermeasures; Aeroelastic model test; Rigid model test; Super high-rise building; Wind tunnel test
• ISSN: 2352-7102; 2352-7102
• DOI: 10.1016/j.jobe.2021.103681

The new-generation high-rise buildings are taller and more flexible than before. Rigid model and aeroelastic model tests of a proposed steel super high-rise building with a height of 838 m were carried out in two simulated typical wind fields defined in the Chinese code [1] and the ISO standard (ISO 4354) in an atmospheric boundary layer wind tunnel. The wind pressure distributions of the building were obtained through the rigid model tests and then the wind-induced vibration responses of the building were calculated. Through the aeroelastic model test, the vibration responses of the building, which naturally include the wind–structure coupling effects, were directly obtained. The test results shows that strong crosswind vortex-induced resonance may appear at high wind speeds. Based on these results, the crosswind aerodynamic damping of the building was then studied. Finally, seven aerodynamic measures for controlling the wind-induced vibrations of the building were proposed and tested. The results show that the seven proposed aerodynamic measures can reduce the dynamic responses of buildings in different degrees. 1.Wind-induced vibration responses of a proposed super high-rise building have been investigated carefully in two simulated typical wind fields.2.Wind-structure coupling effects which may lead to strong crosswind vortex-induced resonance at high wind speeds have been emphasized and discussed.3.A detailed comparative analysis of seven aerodynamic countermeasures for reducing the wind-induced vibrations of the super high-rise building has been carried out and the underlying mechanisms have been illustrated.