WIND TUNNEL TEST STUDY OF AERODYNAMIC DAMPING OF SUPER HIGHRISE BUILDINGS

Along-wind and across-wind aerodynamic damping ratios of a square cylinder with aspect ratio of 6 are identified from the dynamic responses of its SDOF aeroelastic model with random decrease method. Parametric studies of the effects of wind velocity, wind condition and structural damping on the aerodynamic damping are performed. Formulas of the aerodynamic damping ratios are put forward through curve fitting technique.