Underground Evacuation and Smoke Flow Simulation in Guangzhou International Financial City during Fire

IF 3 3区 农林科学 Q2 ECOLOGY
L. Liao, Haiyang Li, Pengyu Li, X. Bao, Chengyu Hong, Daochu Wang, Xiaofeng Xie, Jianhao Fan, Peichen Wu
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引用次数: 2

Abstract

The underground space in the Starting Area in the Guangzhou International Financial City is being developed to save resources and improve land benefits. However, high-density development has increased the likelihood of fires. Therefore, PyroSim and Pathfinder were used in this study to investigate the fire smoke flow and personnel evacuation in the underground space in the Starting Area. Firstly, the 2D temperature cloud map and the temperature and visibility recorded by sensor A over time of Zone I in the Starting Area were analyzed. Then, the 3D smoke diffusion, the 3D temperature diffusion map, and the value of thermocouple and smoke obscuration recorded by sensors of Zone II were analyzed. Next, smoke flow of Zones III to V in the Starting Area under different fire source positions was simulated. Finally, the personnel evacuation model was established to simulate the personnel flow rate and density. The simulation results show that the available safe evacuation time for people is 530 s when all the firefighting facilities fail and fire breaks out in Zone I. For large public spaces, the overall spread speed of fire is fast, which requires the use of the fire control system in time to control the spread of fire. Fortunately, the space of evacuation time is relatively sufficient; it only takes 143 s to evacuate personnel safely in Zone II, which is sufficient compared to the time for the fire to completely spread. Suggestions were made for fire safety management, such as evacuating personnel to the safety exits of other adjacent areas during a fire and installing linkage fire alarm systems in large public space s.
火灾中广州国际金融城地下人员疏散及烟流模拟
为节约资源,提高土地效益,正在开发广州国际金融城起始区的地下空间。然而,高密度的开发增加了火灾的可能性。因此,本研究使用PyroSim和Pathfinder对起跑区地下空间的火灾烟气流动和人员疏散进行了研究。首先,分析了启动区I区的二维温度云图和A传感器记录的温度和能见度随时间的变化。然后,分析了三维烟雾扩散、三维温度扩散图以及II区传感器记录的热电偶和烟雾遮挡值。其次,模拟不同火源位置下启动区III ~ V区烟流。最后,建立人员疏散模型,模拟人员流动速率和密度。仿真结果表明,当所有消防设施失效,i区发生火灾时,人员的可用安全疏散时间为530秒。对于大型公共空间,火灾的整体蔓延速度快,这就要求及时使用消防系统控制火势的蔓延。幸运的是,疏散时间的空间相对充足;安全疏散II区的人员只需要143秒,这与火势完全蔓延的时间相比是足够的。对火灾安全管理提出建议,如火灾发生时将人员疏散到其他相邻区域的安全出口,在大型公共场所安装联动火灾报警系统等。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Fire-Switzerland
Fire-Switzerland Multiple-
CiteScore
3.10
自引率
15.60%
发文量
182
审稿时长
11 weeks
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