A FIRE SPREAD MODEL BASED ON EXPERIMENTS CONSIDERING RANDOM DISTRIBUTION OF COMBUSTIBLES

Most fire risk analyses have been done only taking the density, i.e. the average amount per unit floor area, of combustibles into consideration. However, risk caused by a fire is anticipated to depend not only on the combustible density but also on other parameters of combustibles, such as shapes, distribution pattern and so on, especially at growth stage of the fire. So, it is important to explain effects of combustible properties on heat release rate analyzed by fire spread model considering some fire physical models. The objective of this paper is to improve fire spread model based on wood crib fire experiments in which combustion properties of wood crib, flame height, flame temperature and requirements for fire spread were observed. Then comparing experiment results with analysis results using this model conformed the validity of this models. Finally, result of analyses showed that the improvement model can evaluate quantitively fire spreading of wood crib with accuracy.