Bulletin of Japan Association for Fire Science and Engineering

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This study develops a procedure to evaluate the fire resistance of steel construction buildings for tsunami vertical evacuation exposed to fires in tsunami inundation area. Structural safety of buildings for tsunami vertical evacuation needs to be ensured under not only seismic and tsunami forces but also thermal influence of fires following tsunamis. The proposed procedure consists of the following processes: (A) prediction of the mass density of combustibles accumulated around buildings due to tsunamis based on tsunami inundation and drift simulation, (B) determination of falling-off of exterior walls due to tsunamis, (C) prediction of temperature of external and internal fires to which structural members are exposed, (D) prediction of fire duration, (E) prediction of temperature of structural members, (F) prediction of damage of structural frame due to seismic and tsunami forces, (G) prediction of collapse time based on static structural response analysis in fires with structural and fire protection damage, and (H) determination of collapse by comparing collapse time with fire duration. According to the results of applying the proposed procedure to a design example, we concluded that the proposed procedure can reasonably evaluate the fire resistance by considering the influence of the difference in tsunami inundation depth and mass density of combustibles accumulated around buildings depending on the locations of buildings.

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