Bulletin of Japan Association for Fire Science and Engineering
Online ISSN : 1883-5600
Print ISSN : 0546-0794
ISSN-L : 0546-0794
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Volume 54, Issue 2
Displaying 1-3 of 3 articles from this issue
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Paper
  • Study on Evaluation Method of Accessibility to Water Resources for Fire Fighting in Urban Earthquake Disaster
    Takao NAKANO, Yoshio KUMAGAI
    2004 Volume 54 Issue 2 Pages 25-37
    Published: 2004
    Released on J-STAGE: April 07, 2011
    DOIhttps://doi.org/10.11196/kasai.54.2_25
    JOURNAL FREE ACCESS
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    The purpose of this study is to evaluate available water resources for fire-fighting immediately after the earthquake strikes. We have calculated the possibility that pumpers reach water resources, considered roads link closed by collapsed buildings. Data on the risk of road link come from disaster cases with the Great Hanshin-Awaji Earthquake.
    In order to conduct quantitative assessment of accessibility to water resources, we have developed the computer system program, and analyzed the relationship between results of the calculation experiment and area specifications.
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  • Assessment on Seismic Retrofitting of Buildings in Earthquake Fires and Initial Fire-fighting Activities
    Takashi IMAI, Yoshio KUMAGAI, Tatsuya IWAMI
    2004 Volume 54 Issue 2 Pages 39-48
    Published: 2004
    Released on J-STAGE: April 07, 2011
    DOIhttps://doi.org/10.11196/kasai.54.2_39
    JOURNAL FREE ACCESS
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    The fires following the Great Hanshin-Awaji Earthquake brought considerable damages. Some papers pointed out that building collapse partly contributed to devastating disaster especially at the initial stage of fires. If building damages had been less serious, residents would have participated in fire-fighting more. Thus, we focused on the relationship between building damage and fire disaster, and this study proposed the assessment methods how seismic retrofitting could improve fire fighting conditions by residents' at the initial stage of fires.
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  • Short-circuit Faults on Electrical Wires Exposed to External Radiant Heat
    Yasuaki HAGIMOTO, Norimichi WATANABE, Katsuhiro OKAMOTO
    2004 Volume 54 Issue 2 Pages 49-55
    Published: 2004
    Released on J-STAGE: April 07, 2011
    DOIhttps://doi.org/10.11196/kasai.54.2_49
    JOURNAL FREE ACCESS
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    Short-circuit faults on electrical cords exposed to external radiant heat are usually initiated by an arcing through charred insulating material or a physical (metal-to-metal) contact of hot conductors. In this study, various types of PVC and rubber-insulated power cords were exposed to external radiant heat by using a cone heater and initial electrical activities on the cords were investigated. Types of short-circuits depended upon the size and types of cords, materials of insulation, strength of external radiant heat, and duration of exposure to the heat flux. Physical shorts occurred on PVC-insulated cords at 20 kW/m2 when their conductors were twisted or pinched. PVC-insulated cords required 40 kW/m2 to start arcing shorts. Arcing shorts occurred on rubber-insulated cords at 20 kW/m2, though physical shorts did not occur at 40 kW/m2. The authors discussed on when and how short-circuit faults are produced on electrical cords under exposure to external radiant heat.
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