PREDICTION FORMULA OF CRITICAL WIND SPEED OF TORSIONAL AERODYNAMIC UNSTABLE VIBRATION

Abstract

In the present "AIJ Recommendations for Loads on buildings, 1993", the criterion for the aerodynamic unstable vibration in the across-wind vibration is proposed. However, the condition for the occurrence of self-excited vibration in the torsion was not regulated in the recommendations. In this report, the prediction formula of the critical wind speed of the torsional aerodynamic unstable vibration is proposed based on the results of resent researches.