武汉光谷广场综合体全地下高大空间自然排烟可行性研究

Feasibility study on natural smoke exhaust in all underground and high space of Wuhan Optics Valley Plaza Complex

对武汉光谷广场综合体全地下高大空间最不利火源位置处行李引发火灾时,采用自然排烟设计方案的效果进行了研究,对火灾时烟气的蔓延过程、能见度、温度场及CO浓度等指标进行了模拟分析。研究表明,该地下高大空间利用顶部采光带设置自然排烟窗,在火灾发生时能将火灾烟气有效排出,且能为人员疏散提供安全环境。烟气上升过程中,装修吊顶对烟气的阻隔效应明显,随着吊顶镂空率的减小,自然排烟效率下降。建议吊顶镂空率应大于33%,以确保烟气有效排出和人员安全疏散。

Studies the design scheme effect using natural smoke exhaust when fire resulted from baggage occurs at the most unfavorable fire source position in the all underground and high space of Wuhan Optics Valley Plaza Complex. Analyses the smoke spread process, visibility, temperature field and CO concentration in case of fire by simulation. The result shows that the smoke can effectively exhaust from natural smoke exhaust windows set in the top when fire occurs in all underground and high space and there will be a safe environment for personnel evacuating. In the rising process of smoke, the decoration ceiling has obvious smoke-blocking effect. The efficiency of natural smoke exhaust decreases with the decrease of the ceiling hollowing rate. Suggests that the ceiling hollowing rate should be more than 33% to ensure the effective smoke exhaust and safe personnel evacuation.