开合式屋盖结构的防火设计

摘要

针对黄龙体育中心网球中心钢结构开合式屋盖进行火灾危险性分析,首先分析开合式屋盖结构的机械/控制系统,分析其耐火薄弱部位,然后设定火灾场景A、B,基于普通热辐射理论的火焰动力学,分析钢结构屋盖的温度变化.结果表明,在火灾场景A下,结构基本处于安全状态；在火灾场景B下,需要采取措施进行耐火保护,如在机械/控制系统的电动机和电路上方布置喷淋,在主拱桁架中的构件上喷涂防火涂料等.%Fire risk analysis was made on steet structure retractable roof of tennis center, Huanglong Sports Center. Firstly, a-nalysis was made on mechanical/control system and its weakest part. Then, setting fire scenarios A and B, according to flame dynamic theory, temperature change of steel structure roof was analyzed. The results showed that in fire scenario A, roof structure is safe; while in fire scenario B, countermeasures for fire protection must be took such as installing sprinkler system above electrical motor and circuit of mechanical/electrical control system, spraying fireproof coating on the main arch truss component.