Analytical method for coupled across-wind and torsional wind responses with motion-induced wind forces

Abstract

High-rise buildings have been increasingly constructed with vibration control devices or vibration isolation devices. It is necessary to estimate the responses of these buildings in high wind speed region where self-excited vibrations occur, such as self-excited vortex-induced vibration, galloping and torsional flutter, in relation to their ultimate limit state or to the damage control state provided by their control device. This paper proposes a spectral analysis method and a time history analysis method using motion-induced wind forces for wind responses of high-rise buildings with coupled across-wind and torsional vibrations, and discusses the validity of these methods.