【摘要】 利用经验公式和FDS模拟两种方法分别计算钢结构可能达到的最高温度。设航站楼钢结构失效温度为300℃。场景A:火源位于二层办票厅内办票岛处,火灾最大热释放速率5.7MW,经经验公式及FDS模拟其屋顶最低点钢构件温度分别为78.4℃、69.8℃。场景B:火源位于二层候机厅左侧商店内,自动喷水灭火系统和排烟系统失效时火灾最大热释放速率16.9MW,经FDS模拟屋顶最低点钢构件温度为249.6℃。两场景均能满足防火安全性要求。为提高安全性,应确保自然排烟窗有效,并对航站楼内钢柱进行防火保护,保护高度不低于8m,耐火极限不低于2h。更多还原

【Abstract】 The highest temperature of steel was simulated by FDS and empirical formula. The temperature make terminal collapsing was supposed to be 300 ℃. The fire at the check-in office on the second floor had the biggest heat release rate of 5.7 MW in scene A. The steel at lowest point of roof had the temperature of 78.4 ℃ or 69.8 ℃ by empirical formula or FDS. The fire at the left side shop of boarding lounge on second floor had the biggest Heat Release Rate of 16.9 MW when the auto-sprinkler system and smoke extraction system were out of work in scene B. The temperature of steel at lowest point of roof is 249.6 ℃ by FDS. Both scene A and scene B were safe. To make sure the natural smoke exhaust system work effectively was suggested. The steel column in terminal should be protected by not lower than 8 m and the fire duration of fire resistance should be longer than 2 h.更多还原