Application of Cellular Automata to Simulation of the Spread of a Fire on a City Site

M. Xie, N. Sakamoto, and H. Ogura (Japan)


Cellular automata, City fire, Simulation, Fire resistance cell


Cellular automata (CA) are models for simulating natural phenomenon, fluid dynamics, traffic flow and so on. CA discretizes time, space and state, and by interactions between cells in a lattice, complicated behavior is produced. In the case of fire during an earthquake disaster, it is difficult to analytically calculate the range over which the fire expands, because a lot of factors, such as locations and building materials, are complicatedly intertwined. A method for simulating city fires using CA has therefore been developed. However, accurate simulation becomes difficult using conventional CA due to the increase in buildings fitted with fire resistance functions in the present age. In this paper, a CA model is proposed in which fire resistance cells corresponding to fire resistance buildings are considered and reduction of the spread of fire by extinguishment is included. To verify the effectiveness of the proposed model, a simulation is performed over a region that was damaged by fire in the Great Hanshin-Awaji Earthquake, and compared to the traditional method using experimental results.

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