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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