疏散通道的流通能力及人员的行走速度是预测建筑物内人员疏散时间的主要因素,而疏散通道的流通能力、人员的行走速度、人员密度三者之间密切相关。本文对现有典型的国内外密集人群沿水平通道、楼梯上行、下行的移动模型进行了对比,分析了不同模型中人群密度与行走速度及流通能力之间关系的异同,并通过工程案例对用不同模型预测的的疏散时间进行了对比分析。研究结果表明:对于不同类型的疏散通道,各模型在人员自由移动与人员高度密集状态下的结果差异较大。对于水平通道,大部分模型在0.5人/m2≤D≤2.5人/m2的人流密度范围内,结果比较接近。对于沿楼梯上行的人员移动,由于影响因素众多,各模型间差异较大。
The specific flow of the egress paths and the walking speed of the people are the key factors for the evacuation time prediction under emergency conditions. The research works on the movement behavior along the level paths and stairs are reviewed in this paper, and the evacuation time from a high-rise building predicted by different research models are compared. It is found that large differences of the movement speeds exist under the free walking and higher-density movement conditions. For the level surfaces, the results are almost same, when the crowd density is in the range of 0. 5 person/m2 D 2.5person/m2. However, for the walking upstairs, due to so many influence factors, the existing models are so different.