AIJ Journal of Technology and Design
Online ISSN : 1881-8188
Print ISSN : 1341-9463
ISSN-L : 1341-9463
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Showing 1-50 articles out of 80 articles from the selected issue
Materials and Construction
Fire Safety
  • Seunggoo KANG, Yoshifumi OHMIYA, Kei KIMURA
    2020 Volume 26 Issue 64 Pages 966-971
    Published: October 20, 2020
    Released: October 20, 2020

    This study is an experimental study on behavior of the fire plume ejected from an opening under soffit with H-beam beneath the tip. We used a large-scale experimental apparatus. Also, experimental conditions are the opening size, soffit size, handrail, and fire source. The temperature prediction under the soffit is proposed by using the Watanabe model (predictions of ceiling jet temperature by combining a two-layer zone model) and the Ohmiya model (predictions of the vicinity of vertical wall temperature) in combination. It was confirmed that the calculated value and the experimental result mostly match.

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  • −Thinning of winding type fire-proofing covering materials−
    Takeshi MORITA, Shiro KONDO
    2020 Volume 26 Issue 64 Pages 972-977
    Published: October 20, 2020
    Released: October 20, 2020

    An attempt was made to improve the conventional technology in terms of both materials and construction methods with the aim of saving the fire-resistant covering work using the winding type fire-proofing covering materials for steel beams. Specifically, we examined the effective use of the heat capacity of steel beams, the thickening of only the lower flange covering, and the densification of heat-resistant rock wool. As a result, it was confirmed that the thinning of heat-resistant rock wool by increasing the density was the simplest and most effective from the viewpoint of fire resistance and labor saving.

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  • −Case study of Kanazawa City−
    Hiroyuki TANAKA, Mitsuhiko KAWAKAMI, Zhen-jiang SHEN, Tatsuya SEKIGUCH ...
    2020 Volume 26 Issue 64 Pages 978-983
    Published: October 20, 2020
    Released: October 20, 2020

    Large scale of fires spreading could occur in urban areas where are consisted of dense wooden buildings. Although it’s urgent need to minimize the fire spreading risks, historical buildings are also precious for preserving area’s characteristics. Kanazawa is one of historical cities and has a lot of historical building in its central area. This study estimates fire spreading risks in those historical area and evaluates effectiveness of the disaster prevention projects by the Kanazawa municipality. As the result of the study, it is found the risks are still remain after the projects. We propose some methodologies for minimizing the risks.

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Environmental Engineering
Architectural Planning and Design