摘要
为提出切实可行的古建筑火灾防治措施,木结构古建筑特有结构木板壁对火灾蔓延的影响规律值得重点关注。以上海静安寺大雄宝殿为例,利用火灾动力学模拟器(FDS)软件开展火灾数值模拟,研究不同结构木板壁对古建筑室内火灾蔓延过程的影响。结果表明:木板壁作为火焰纵向蔓延的主要通道,其上部开口增大,火焰纵向蔓延时间增加,轰燃推迟;木板壁上部开口可加速火灾烟气的水平蔓延速度,不同开口尺寸对大殿后方烟气层沉降速度影响不大;无开口结构时烟气层高度下降至4 m,用时增加20 s。
Ancient timber buildings have special fire characteristics.In order to put forward feasible fire prevention and control measures,the influence law of the specific structure plank wall on the fire spread was researched.A specific fire in the main hall of Jing'an temple in Shanghai was simulated using Fire Dynamics Simulator(FDS)to obtain the influence of plank wall with different structures on the fire spreading.The results show that the plank wall acts as the main channel for longitudinal propagation of the flame,and the flame longitudinal propagation time increases and flashover delays with the increasing of upper opening size,that the upper opening can accelerate the fire smoke horizontal spreading speed,that different opening sizes have little influence on the settling velocity of smoke layer behind the main hall,and that the condition without opening increases the time that the smoke layer height falling to 4 m by 20 s.
作者
李贤斌
濮凡
邹丽
高郭平
丛北华
LI Xianbin;PU Fan;ZOU Li;GAO Guoping;CONG Beihua(School of Safety Science and Engineering,Shanghai Maritime University,Shanghai 201306,China;Shanghai Tongtai Fire&Security Technology Co.Ltd.,Shanghai 201703,China;Shanghai Institute of Disaster Prevention and Relief,Tongji University,Shanghai 200092,China)
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2019年第11期45-50,共6页
China Safety Science Journal
关键词
古建筑火灾
木板壁
数值模拟
轰燃
烟气层高度
火灾蔓延
ancient building fire
plank wall
numerical simulation
flashover
smoke layer height
fire spread
