| Co-Investigator(Kenkyū-buntansha) |
HARADA Kazunori Kyoto University, Dept. of Architecture, Instructor, 工学部, 助手 (90198911)
YOSHIDA Harunori Kyoto University, Dept. of Architecture, Instructor, 工学部, 助手 (00144337)
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| Budget Amount *help |
¥7,200,000 (Direct Cost: ¥7,200,000)
Fiscal Year 1990: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1989: ¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1988: ¥3,600,000 (Direct Cost: ¥3,600,000)
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| Research Abstract |
In this study, three fundamental researches are carried out for the fire safety design of the underground spaces. One is the modeling of the compartment fire, the other two are the measurements and analysis of the wind in underground shopping mall and subway station, and the research of the present state of the guiding systems for evacuation.
On the modeling of compartment fire, a model scale experiments and stability analysis of the stationary solution of the zone model, are carried out. In the experiment, room temperature, the rate of heat release, the rate of CO and CO2 generations are measured under various opening conditions. In case of slit shaped opening, continuous and stable flames out of the opening was observed. In case of small opening height, oscillating flames out of the opening was observed. To predict this phenomena and the onset of flashover, a room fire is described by a two layer zone model, and the stability analysis of the stationary points was carried out. The onset of flashover is thought to be a jump from the unstable point to the stable point, and the bifurcation of the stationary points are investigated. The solution curves become S-shaped due to the changes of the opening size, burning area and the kind of fuels. The Hops bifurcations and existence of oscillatory solution are detected.
The wind velocity, temperature and the crowd flow were measured in an underground shopping mall and a subway station. The effect of the crowd flow, the piston wind caused by trains, outside climate, crowd flow and HVAC systems on the wind velocity are investigated. The wind velocity is predicted by a network analysis of venting paths with considerations of the above conditions.
The present state of the systems of guidance for evacuations are researched. Considerations are given to the possibility of the troubles in case of emergency.
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