Abstract
High-rise buildings are being increasingly constructed with vibration control devices or isolation devices. It is necessary to estimate the responses of these buildings in the high wind speed region where self-excited vibrations occur, such as self excited vortexinduced viberation, galloping and torsional flutter, in relation to their ultimate limit stage or damage control provided by their control devices. This paper proposes a spectral analyzing method and a time history analyzing method using motion-induced wind force for wind responses of high-rise buildings with coupled across-wind and torsional vibrations, and discusses the validity of these methods. Results of spectral analysis considering coupled motion-induced wind forces show that the response to across-wind vibration increases at the wind speed at which the torsional response increases rapidly, when the natural frequency of across-wind vibration is lower than that of torsional vibration.
