Transactions of the Atomic Energy Society of Japan
Online ISSN : 2186-2931
Print ISSN : 1347-2879
ISSN-L : 1347-2879
Article
Evaluation of Building Internal Pressure Change Caused by Tornado Approach
Juntaro SHIMIZU Kyohei AKINOShunsuke OHTSUBO
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2018 Volume 17 Issue 1 Pages 1-10

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Abstract

 Atmospheric pressure changes (APC) due to a tornado may lead to large loads on air-tight buildings, such as nuclear facilities which contain radioactive materials inside. However, each building has several openings for ventilation. Taking into account their pressure equalization effect, the loads can be evaluated more realistically. This study introduces the numerical calculation code “TAIPEC”, based on Bernoulli’s theorem and the state equation of air, which was developed to analyze the inner pressure change and air flow rate through an opening of a building due to a pressure difference caused by APC. It runs on widely available computer software, Microsoft® Excel or Matlab®. TAIPEC was verified by the experimental results from the blow-out test conducted in this study and a wind tunnel test and a simulated tornado test in previous studies. Then, the calculation results are discussed from the standpoint of the Reynolds number. Finally, an example simulation was conducted to show the effect of a blow-out panel on reducing the load on a building.

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© 2018 Atomic Energy Society of Japan
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