The methods of thermal radiation theory and FDS simula-tion for analyzing safety of fire barrier were introduced, the influ-encing factors including space height, fire release rate and the least radiation heat flux igniting combustibles on the fire barrier width was mainly discussed.The results showed that the larger the HRR is, the smaller the space height and the radiation heat flux igniting combustibles is, the larger the required fire barrier width is. 12-meter-wide fire barrier can meet the requirements of fire com-partment in large space building, and when the space height is close to 20 m, the influence of the thermal radiation of the smoke layer on the fire barrier width can be neglected.%介绍了利用热辐射理论计算和FDS模拟对防火隔离带分隔的安全性进行分析的方法,重点研究了建筑空间高度、火源热释放速率以及可燃物被引燃的最小辐射热流量对防火隔离带宽度的影响.结果表明,火源热释放速率越大、建筑空间高度越小,可燃物被引燃的辐射热流量越小,所需防火隔离带宽度越大.12 m宽度基本能满足防火隔离带作为大空间建筑防火分区分隔的安全要求,且当空间高度接近20 m时可忽略烟气层热辐射对防火隔离带宽度的影响.
展开▼
