Wind-induced response and wind vibration coefficient of large single column-supported billboards

Based on rigid model wind tunnel tests, the wind load characteristics of double-side and three-side single column-supported billboards were analyzed, and their wind-induced vibration characteristics were studied using the time history analysis method. The results showed that the mean and fluctuating total wind loading coefficients for a double-side billboard have the maximum values of 1.46 and 0.17 under 0°~15° wind direction angle, while those of a three-side billboard have the maximum values of 1.45 and 0.16 under 0° wind direction angle; their mean torgue coefficient reaches the maximum value under 52.5° and 30° wind direction angles, respectively; the resonance energy of node displacement for a double-side billboard is provided by the bending mode perpendicular to the panels, while that for a three-side billboard is provided by the bending modes perpendicular to and parallel to the center line of the triangle composed with panels; the resonance energy of beam torsion angle for two billboards is provided by torsional modes; the most unfavorable condition for bending vibration of two billboards is 0° wind direction angle, and the wind vibration coefficients are 1.51 and 1.59, respectively; while the most unfavorable conditions for torsional vibration of two billboards are 52.5° and 30° wind direction angles the wind vibration coefficient are 1.63 and 2.65, respectively. ©, 2015, Chinese Vibration Engineering Society. All right reserved.