关键词: 气承膜结构, 储煤棚, FDS, 火灾模拟, 膜材温度分布, 气膜内压

Abstract: In recent years, the country has continuously put forward new requirements for high?quality and green development. The novel air?supported membrane structure in building forms has been widely used in coal storage yards due to its unique advantages, but it corresponds to special fire safety issues. This article conducts numerical simulation research on the temperature distribution and pressure changes inside the membrane of air?supported membrane structure coal storage shed. The results show that the maximum temperature near the membrane surface depends on the distance between the fire source and the membrane surface. When the fire source is too close to the membrane surface, the membrane material will be heated and perforated, with a maximum perforation area of 29.75 m2. Most of the hot smoke will be discharged with the perforation, and the overall temperature inside the membrane will be greatly reduced. When the membrane material is not burned through, the trend of pressure changes inside the membrane at different fire source positions is similar, and the maximum value of internal pressure does not differ significantly. When the membrane material is burned through, the pressure inside the membrane rapidly decreases, which will affect the stability of the membrane structure and may lead to building collapse.

Key words: air?supported membrane structure, coal storage shed, temperature distribution of membrane material, internal pressure