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| Along-wind aerodynamic damping of isolated square high-rise buildings |
| Cao Hui-lan，Quan Yong, Gu Ming, Wu Di |
| State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092 |
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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.
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Received: 30 August 2011
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Corresponding Authors:
Cao Hui-lan
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2012, Vol. 31 
