摘要
高层建筑发生火灾时,疏散通道内的环境安全是重中之重。以马鞍山市某13层办公楼为原型,基于火灾动力学的理论,利用FDS火灾仿真软件对其楼梯间发生火灾时烟气流动特征进行了数值模拟,分别研究在楼梯间底部、中部、顶部起火时,在不同自然排烟开窗方式下烟气的流动规律,并根据模拟结果探讨了在楼梯间底部起火时,CO浓度和温度的分布规律,从而得出最佳的自然排烟的开窗方式,以减少烟气等有害气体对楼梯间疏散环境的影响,可为人员疏散及现场救援等决策提供参考。
The safety of the evacuation passageway of high-rise buildings is crucial in the fire accident.Based on the fire dynamics theory,this paper uses FDSfire simulation software to simulate the smoke movement in the staircase in a 13-floor office building in Ma'anshan as the model prototype.The paper studies the smoke movement characteristics with different natural smoke exhaust methods when the fire breaks out at different location of the staircase(bottom,middle,top).Based on the simulation results,the paper discusses the distribution law of CO concentration and temperature when the fire breaks out at the bottom of the staircase.Thus the paper concludes the best way of opening patterns for natural smoke exhaust to reduce the smoke in staircase,which provides a reference in the process of decision making for personnel evacuation and emergency rescue and so on.
引文
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