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Vibration-Induced Wind Pressure on Large Span Flat Roof

by Takeshi Ohkuma, Kanagawa Univ, Japan,
Hisao Marukawa, Kanagawa Univ, Japan,



Document Type: Proceeding Paper

Part of: Structural Design, Analysis and Testing

Abstract:

Vibration-induced wind pressures on a large span flat roof was investigated by a wind tunnel using a uniformly turbulent flow. Measurements of pressures were made on an asymmetrically deformed roof and an asymmetrically vibrating roof. As a result, it was found that the aerodynamic negative damping pressure is induced when the frequency of vibration is slightly smaller than the characteristic peak frequency of the power spectrum of fluctuating wind pressure on the rigid flat roof. However, the negative damping pressure leeward of the reattachment point of the flow over the roof is so small it is negligible. On the other hand, the aerodynamic stiffness pressure is almost always negative throughout the roof.

Subject Headings: Wind pressure | Roofs | Vibration | Wind power | Aerodynamics | Damping | Wind tunnel

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