火灾事故下人群承受热辐射阈值差异分析

In order to ensure rationality of fire repulsion calculation in evacuation model and reduce casualties in fire accidents, field test was conducted. Firstly, radiation of a real fire source was simulated with a radiant heating plate at surface temperature of 600 and 900 ℃ used as a radiator, and maximum distance for subjects with different heights, genders and approaches was recorded. Then, multi-factor difference of their thermal radiation threshold under pressure of escape during evacuation was calculated and compared. The results show that thermal radiation threshold of individuals is related to height, gender and herd mentality in conformity with a normal distribution. It is positively and linearly correlated with height for a single person, and two-person approach can increase individuals ' tolerance to thermal radiation. Moreover, female's tolerance is lower than male, but more stable. As a reference for improving fire repulsion and ensuring personnel safety, thermal radiation threshold should be less than 3.49 kW / m² for a single-person approach, while less than 4.52 kW / m² in case of two-people approach.