木结构古建筑室内火灾发展的数值分析

消防安全是所有类型建筑中的重要问题,特别是在木结构古建筑中。在本文中,室内火灾实验是在一个高火灾荷载的木结构古建筑的全尺寸模型中进行,并通过烟气和火焰蔓延来探索火灾的增长及蔓延方式。使用FDS软件模拟不同火灾情景下火灾的发生发展过程,以研究火灾发展的影响因素,并预测木结构古建筑的火灾特征。结果表明,火源在大殿的角落和屋顶处易引起火灾蔓延;大殿内火灾荷载越多,火灾蔓延速度越快;木材的热解温度越低,发生轰燃时间越短。

Numerical Analysis of the Development of a Temple Fire in a Wooden-Structure Historical Building

Fire safety is an important issue in all types of construction, especially in wooden-structure ancient buildings. In this paper, temple fire experiments were conducted in a full-scale model with high fire load in a wooden-structure ancient building to explore fire growth and spread via smoke and flame. And in order to study the influencing factors of fire development and to predict the fire characteristics in ancient wooden-structure buildings, the FDS software was used to simulate the occurrence and development of fires in different fire scenarios. The results show that the fire is easier to cause spread in the corner and roof in the temple; the more fire load in the temple, the faster the fire spreads; the lower the pyrolysis temperature of the wood, the shorter the time of the flashover is.