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为研究火灾场景下的人员疏散规律,建立基于FDS+CA的火灾疏散模型。首先,利用FDS开展火灾数值模拟,将火灾产物实时数据加载至CA模型,实现火灾环境对人员疏散行为的持续约束;其次,以地下商业街为研究对象进行仿真模拟,结合蒙特卡洛模拟对不同场景下的火灾蔓延情况和人员疏散结果进行分析。研究表明,火源位置是影响人员疏散效率的关键因素,火源靠近疏散出口时局部疏散失效风险大幅提升,疏散滞留人数显著增加;火源热释放与烟气扩散会导致周围疏散路径失效,部分出口无法达到人员疏散条件,从而延长整体疏散时间。受空间布局影响,烟气扩散速度存在显著差异,低矮障碍物区域烟气蔓延尤为迅速;在封闭地下空间内,机械排烟系统能有效降低烟气浓度,提升疏散效率。研究结果可为地下商业街火灾场景下的人员疏散和防火设计提供参考。
Abstract:To study the evacuation patterns of people in fire scenarios,a fire evacuation model based on FDS+CA was established. Firstly,FDS was used to conduct numerical simulations of fires,and the real-time data of fire dynamics were loaded into the CA model to continuously reflect the impact of the fire environment on the evacuation behavior of people. Secondly,a simulation was conducted with an underground commercial street as the research object,and the fire spread and evacuation results under different scenarios were analyzed in combination with Monte Carlo simulation. The research shows that the location of the fire source is a key factor affecting the evacuation efficiency of people. When the fire source is close to the evacuation exit,the risk of local evacuation failure increases significantly,and the number of trapped in the area increases significantly. The heat release and smoke diffusion of the fire source can cause the failure of surrounding evacuation paths,and some exits cannot meet the evacuation conditions,thereby prolonging the overall evacuation time. Due to the influence of spatial layout,the speed of smoke diffusion varies significantly,and the smoke spreads particularly rapidly in areas with low obstacles. In a closed underground space,a mechanical smoke exhaust system can effectively reduce the smoke concentration and improve the evacuation efficiency. The research results can provide references for the evacuation and fire protection design of underground commercial streets in fire scenarios.
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基本信息:
DOI:10.13291/j.cnki.djdxac.2026.04.004
中图分类号:TU998.1
引用信息:
[1]石剑云,王莹,任轶华.基于FDS+CA耦合模型的地下商业街火灾动态疏散模拟[J].大连交通大学学报,2026,47(04):28-36.DOI:10.13291/j.cnki.djdxac.2026.04.004.
基金信息:
辽宁省教育厅科学研究项目(LJKQZ20222462)
2026-08-17
2026-08-17
2026-08-17