平常時および地震時火災の延焼速度式に関する基礎的研究 A Basic Study on Fire Spread Formula both in Ordinary and Earthquake Disaster

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我が国では,昭和51年の酒田大火を最後に都市大火は発生していなかった。しかし,兵庫県南部地震において神戸市内で発生した市街地火災のような大地震や強風下等の悪条件のもとでは,大火発生の危険は依然として残されている。そこで,本研究では,平常時については,K市とM市の火災,昭和21年~昭和27年までの大火並びに酒田大火についての延焼速度式について分析した。一方,神戸市の地震時の延焼速度式に関して,実測の焼損面積と予測値との相関は,r≒0.9程度であり,かなりよく一致していることなどがわかった。<br>(オンラインのみ掲載)

Big fire has often occurred since the dawn of history in Japan. And Japan has the world worst record even in the scale. The big fire that building burn-out area is over 33,000 m<sup>2</sup> in the 20's of Showa has occurred numerously. After that we were toward one goal called "the fire prevention of a city". As a result, big fire has not been breaking out since the big fire of Sakata in Showa 51 (1976). And the fire prevention measure has moved to the building fire prevention of large-scale/upper layers buildings from the big fire prevention of city area since this time. However, the occurrence of big fire has not been eradicated at all. The danger of big fire occurrence is still remained under the unfavorable conditions like a large earthquake and a strong leeward. Thereupon we analyzed about the fire spread formula of wooden building both in ordinal and earthquake disaster. <br>The conclusion is as follows. <br>(1) We changed the fire spread formula as the expression of K city in eq. (3) from eq. (1) with an easier style. It may express in the eq. (3) from in eq. (1). <br>(2) Fires of K city and M city are shown to Fig. 4 as an example under G=100m<sup>2</sup>, v=3 m/sec. If each burn-out area is compared, it is understood that the structure of M city after about 30 years is difficult burning than the building fire of K city. <br>(3) Applying eq. (3) about the big fire from Showa 21 to Showa 27, Table 2 was obtained. Coefficients a<sub>1</sub> and c<sub>1</sub> are able to indicate each eq. (8) and eq. (9). The correlation figures of measurement value and prediction values of all fire data of Table 2 were shown to Fig. 9. As multiple coefficient of correlation R=0.983, it is agreeing fairly well. <br>(4) It was shown like Table 4 and also Fig. 10 about the Sakata big fire. It is able to indicate in eq. (3) and R=0.999. It is thought that the Sakata big fire became difficult to burn more previous big fire of the Showa 20's so that shown in Fig. 11. <br>(5) About the expression at the time of the Kobe earthquake, we re-examined data a part once again. a<sub>1</sub> and c<sub>1</sub> are able to indicate each eq. (11) and eq. (12). a<sub>1</sub> is almost not change the previous paper of ours. <br>The relation c<sub>1</sub> and x<sub>G</sub> is eq. (13) and R=0.899. The correlation between burn-out area of prediction value and measurement is about 0.9. It is agreeing fairly well.

収録刊行物

  • 日本火災学会論文集

    日本火災学会論文集 46(1), 45-55, 1997-04-30

    日本火災学会

参考文献:  18件中 1-18件 を表示

被引用文献:  4件中 1-4件 を表示

各種コード

  • NII論文ID(NAID)
    10002686013
  • NII書誌ID(NCID)
    AN0018688X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    05460794
  • NDL 記事登録ID
    4247371
  • NDL 雑誌分類
    ZN1(科学技術--建設工学・建設業)
  • NDL 請求記号
    Z16-105
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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