Peak Wind Pressure Coefficients for Designing the Cladding of Pipe-framed Greenhouses

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  • UEMATSU Yasushi
    Department of Architecture and Building Science, Tohoku University
  • TANAKA Satoshi
    Department of Architecture and Building Science, Tohoku University
  • MORIYAMA Hideki
    Research Team for Controlled Environment Agriculture, National Institute for Rural Engineering
  • SASE Sadanori
    Research Team for Controlled Environment Agriculture, National Institute for Rural Engineering

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Other Title
  • 園芸用パイプハウスの外装材設計用ピーク外圧係数の提案
  • エンゲイヨウ パイプハウス ノ ガイソウザイ セッケイヨウ ピーク ガイアツ ケイスウ ノ テイアン

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Abstract

The present paper proposes the peak wind pressure coefficients for designing the cladding of pipe-framed greenhouses widely used in Japan, based on a series of wind tunnel experiments. Simultaneous pressure measurements are made with a 1:40 scale model of the greenhouse in a turbulent boundary layer simulating the natural winds over typical open-country exposure. Not only an isolated model but also two or three models arranged in parallel are tested and the effect of adjacent structures on the pressure distributions is investigated. The distribution of the peak pressure coefficients is obtained from the point-pressure measurements. Then, the peak pressure coefficients for designing the cladding are discussed based on the area-averaged pressures and the local lift coefficient. The effect of adjacent structures on the peak pressure coefficient is also investigated.

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