Abstract
The paper aims at developing quantitative estimation method to evaluate the escape safety in buildings. This model is distinctive in that path reliability decreases according to escape distance, and it is unchangeable by adding new nodes. In this paper, reliability calculation is performed by the use of simple network model of the schematic building plan. The length of each network link is converted into link reliability respectively by exponential function, and reliability of the whole network link is synthesized. The result of this paper is expected to be used as an important index for escape safety in a building. It is also expected that this evaluation model will be adapted as an evaluation index of the escape safety of urban area and underground space.