Aerodynamic Damping on the Along-Wind Oscillations of a High-Rise Building

Wavelet Analysis for a Field Measurement

Abstract

The accurate estimation of the unsteady wind force is necessary for the rational design of high rise buildings. For the accurate estimation of the unsteady wind force, it is necessary to evaluate the phase differences between the wind force and the response of structures. In such a case wavelet analysis with the complex wavelet is available. This paper presents the aerodynamic damping force and added mass on a square section prism with the aspect ratio of 5 evaluated by use of the wavelet analysis. The results are described for a field measurement with the large elastic model (1m×1m×5m). It is shown that the aerodynamic damping in the along wind direction is closely related with the oscillation amplitude and the structural damping.