An Unsteady Pressure Differential between the Inside and Outside of a Building Caused by Tornado's Suddenly-dropped Atmospheric Pressure

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  • Takahashi Shunsuke
    Department of Urban Design, Planning and Disaster Management, Graduate School of Human-Environment Studies, Kyushu University : Master's program
  • Minami Kosei
    Graduate School of Engineering, Kyoto University : Master's program
  • Otsubo Kazuhiro
    Department of Urban Design, Planning and Disaster Management, Graduate School of Human-Environment Studies, Kyushu University : Doctoral Program
  • Tsuru Norio
    Graduate School of Human-Environment Studies, Kyushu University
  • Maeda Junji
    Department of Architecture and Urban Design, Faculty of Human-Environment Studies, Kyushu University : Professor

Bibliographic Information

Other Title
  • 竜巻による急激な気圧低下が及ぼす建物室内外の非定常な気圧差力
  • タツマキ ニ ヨル キュウゲキ ナ キアツ テイカ ガ オヨボス タテモノ シツナイ ガイ ノ ヒテイジョウ ナ キアツサリョク

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Abstract

When a tornado travels very fast, an unsteady pressure differential between the inside and outside of a building is generated by suddenly-dropped atmospheric pressure due to the tornado. However, there is little information about the characteristics of a force caused by the pressure differential. The authors developed an experimental system which generated a suddenly-dropping pressure around a building model in a calm condition using a gusty wind tunnel. The effects of an opening area of a building wall on the force generated by the pressure differential were studied using the system. We also performed some numerical simulations and compared with the experimental results. It was found that the bigger force of pressure differential was generated in a case of the smaller opening area.

Journal

  • 都市・建築学研究

    都市・建築学研究 28 41-46, 2015-07-15

    Faculty of Human-Environment Studies, Kyushu University

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