防灾减灾工程学报2023，Vol.43Issue(6)：1313-1321,9.DOI:10.13409/j.cnki.jdpme.20221028003
火源位置对凹型砖木结构古建筑火蔓延特性影响研究
Study on the Influence of Fire Source Location on Fire Propagation Char-acteristics of Ancient Buildings with Concave Brick and Wood Structures
摘要
Abstract
To explore the fire spread characteristics of ancient buildings with concave brick and wood structures,a typical concave ancient building is used as the research object,and the physical model is built by using Pyrosim software to study the influence of different fire source locations on the law of fire spread,as well as the change of temperature,visibility and the dynamic distribution of CO and CO2 concentrations in the process.The results show that different ignition source locations have a greater impact on the fire propagation characteristics,and if the ignition source is located in the south-west corner of the concave ancient building,compared with the northwest and north directions,the heat release rate can reach the maximum value of 225 MW/s;If the ignition source is located in the southwest corner of the building,the indoor temperature can reach the maximum value of 1020℃compared with other working conditions,the concentrations of CO and CO2 are also at their maximum values,and the visibility degradation rate reaches the peak at a vertical height of 1.67 m.This study has great significance and reference value for the fire prevention and control of ancient buildings with concave brick and wood structures and the efficient and safe evacuation of personnel after disasters.关键词
凹型古建筑/砖木结构/火蔓延/燃烧参数/数值模拟Key words
concave ancient buildings/brick and wood construction/fire spreading/combustion pa-rameters/numerical simulation分类
资源环境引用本文复制引用
张嬿妮,刘雪梦,舒盼,黄罗鑫,张陆陆,张帅..火源位置对凹型砖木结构古建筑火蔓延特性影响研究[J].防灾减灾工程学报,2023,43(6):1313-1321,9.基金项目
陕西省创新能力支撑计划(2020TD-021)资助 （2020TD-021）
