Abstract
The objective of this study is to develop the simulation system of spreading urban fire in an earthquake using Petri-net. A house is modeled by the 4 places and 12 transitions. The integral number which corresponds to the spreading time inside the house is allocated to each input arc. In order to represent the catching fire from next door, another transitions are prepared between the places which belong to the different houses. The integral number which corresponds to the spreading time of inter-house is allocated to the arc. It is demonstrated by numerical experiments that the simulation system can be applied to the case of fire which occurs simultaneously in many places.
