Along-wind aerodynamic damping of isolated square high-rise buildings

Cao Hui-lan;Quan Yong;Gu Ming;Wu Di

Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (5) : 122-127.

PDF(2080 KB)
PDF(2080 KB)
Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (5) : 122-127.
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Along-wind aerodynamic damping of isolated square high-rise buildings

  • Cao Hui-lan,Quan Yong, Gu Ming, Wu Di
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Abstract

Along-wind aerodynamic damping ratio is identified from wind-induced response of 37 aeroelastic models in a simulated turbulence wind environment using the random decrement technique (RDT). Their validity is examined through comparison with previous research achievements and the results evaluated by quasi-steady theory. Based on it, the characteristics of along-wind aerodynamic damping of isolated square high-rise buildings are studied. The effects of density ratio, generalized stiffness, structural damping ratio, aspect ratio, side ratio and terrain category on aerodynamic damping ratio of square high-rise buildings are investigated. Results indicate that: aerodynamic damping ratio increases monotonically with reduced wind velocity; structural damping ratio, density ratio, side ratio, reduced wind velocity and aspect ratio are very important parameters for along-wind aerodynamic damping, while no clear effect of generalized stiffness and terrain category on aerodynamic damping ratio is observed. According to the database, an empirical aerodynamic damping function for high-rise buildings is proposed.

Key words

high-rise building / wind-induced vibration / aerodynamic damping / aeroelastic model / wind tunnel test

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Cao Hui-lan;Quan Yong;Gu Ming;Wu Di. Along-wind aerodynamic damping of isolated square high-rise buildings[J]. Journal of Vibration and Shock, 2012, 31(5): 122-127
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