CYLINDRICAL PNEUMATIC MEMBRANE STRUCTURES SUBJECT TO WIND

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  • 側面より風を受ける円筒形空気膜構造について
  • ソクメン ヨリ カゼ オ ウケル エントウケイ クウキマク コウゾウ ニ ツイ

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Abstract

Since pneumatic membrane is usually flexible, wind loading on it should be determinedin due consideration of the interaction between wind and the structure. Analytical methodas interaction system is undertaken here, introducing some modelizations about wind. Someflow pattern models with due regard to the separation flow and wake were set herein incorrespondence with the state of high Reynolds number and numerical calculations werecarried out, applying them to solid cylinder first. It was depicted that numerical result withregard to one flow model shows quite good agreement with Roshko's experimental results.Thence, applying this flow model to the membrane, the interaction analysis was prosecuted, and some design charts about wind pressure distribution, deflections and stresses of themembrane were presented concerning to the several design parameters. Wind tunnelexperimental results are also presented in order to verify the adequency of the inodelizationabout wind. And moreover, the possibility of the representation of wind pressure distributionby a simple function is discussed.

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