Based on rigid model wind tunnel test, the wind load characteristics of double-side and three-side single column supported billboard are analyzed, and the wind-induced vibration characteristics are studied using time history analysis method. The results show that the mean and fluctuating total wind loading coefficient for double-side billboard gets maximum value of 1.46 and 0.17 under 0o ~ 15o wind direction, while that of three-side billboard gets maximum value of 1.45 and 0.16 under 0o wind direction; Their mean torsion coefficient get maximum value under 52.5o, 30o wind direction, respectively; The resonance energy of node displacement for double-side billboard is supported by the bending mode perpendicular to the panels, while that for three-side billboard is supported by the bending modes perpendicular to and parallel to the center line of the triangle composed by panels. The resonance energy of beam torsion angle for two billboards is both supported by the torsion mode; The most unfavorable condition for bending vibration of two billboards is 0o wind direction, and the wind vibration coefficient is 1.51, 1.59 respectively. While the most unfavorable condition for torsion vibration of two billboards is 52.5o, 30o wind direction, and the wind vibration coefficient is 1.63, 2.65 respectively.
Key words
single column supported billboards /
wind tunnel test /
wind load characteristic /
wind-induced response
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Footnotes
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