主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2021, Vol. 40 ›› Issue (5): 643-648.

• • 上一篇    下一篇

砖木结构古建筑不同风速下火灾蔓延规律研究

袁春燕，郎雨佳，王坤，刘兴，王耀麟   

  1. 长安大学建筑工程学院，陕西西安710061
  • 出版日期:2021-05-15 发布日期:2021-05-15
  • 作者简介:袁春燕（1977-），女，甘肃金昌人，长安大学建筑工程学院副教授，主要从事工程安全管理、工程风险控制研究，陕西省西安市南二环路中段，710061。
  • 基金资助:
    国家自然科学基金(51608049)；教育部人文社科项目(15YJCZH214)；长安大学中央高校基本科研业务费专项资金资助(300102280205)

Analysis on the fire spread law of brick-wood structured ancient buildings under different flow velocity

YUAN Chun-yan，LANG Yu-jia，WANG Kun，LIU Xing，WANG Yao-lin   

  1. College of Architecture Engineering, Chang'an University,Shaanxi Xi'an 710061, China
  • Online:2021-05-15 Published:2021-05-15

摘要： 为探明砖木结构古建筑火场下火灾蔓延的变化规律，从火灾蔓延特性、热释放速率、温度的变化等方面探究不同风速影响下的火灾蔓延变化情况。选取中国典型砖木结构三原城隍庙为实例，通过古建筑BIM 参数化建模，合理设置火灾场景进行火场模拟分析。结果表明：风速作用下，火焰蔓延过程变化波动较大，呈现一定的周期性，在一定范围内，风速越大，古建筑热释放速率达到峰值的时间越短、一次峰值与二次峰值的时间间隔越短、达到轰燃的时间越早。热浮力的作用将导致火焰向上蔓延至屋面，屋面位置温度最高，上部结构危险更高。

关键词: 古建筑, 木结构, 模型转化, 火焰蔓延, 轰燃

Abstract: Fire spread characteristics, heat release rate, temperature change etc. have been studied to explore the the changing rules of the fire spread characteristics under different flow velocities in the brick-wood structured ancient buildings. Taking Sanyuan Town God's Temple, a typical brick- wood structure system in China, as an example, with the help of BIM, fire scenarios have been developed to do the fire simulation analysis. The results show that the flame spread fluctuates periodically. within certain areas, the higher the flow velocity, the shorter time for the heat release rate to reach the peak, the shorter time interval between the primary peak and the second peak, and the shorter time to reach the flashover. The buoyancy of hot smoke will cause the flame to spread upward to the roof, where the temperature is the highest, and the structure there will be endangered more easily.

Key words: ancient building, wood structure, model transformation, flame spread, flashover