通过1/2缩尺寸实验和FDS研究无风状态下防火挑檐对建筑外立面竖向火溢流蔓延的阻隔性能,实验结果与模拟结果吻合良好,验证了所建立模型的正确性。并应用FDS研究了室外风对防火挑檐竖向阻隔性能的影响。结果表明,在无风状态下,当防火挑檐的伸出长度为0.6m时,有效的阻隔开口溢出火羽流竖向蔓延;在室外风下,当室外风速为3m/s,风向为水平右侧吹风,窗槛墙高度为0.4m时,0.6m伸出长度的防火挑檐可继续有效阻隔火溢流的竖向蔓延。 The performance of the fire-proof cornice on vertical fire overflow of building facade was studied by ½-scale experiment and FDS. The experimental results agree well with the simulation results, and the correctness of the model is verified. FDS was used to study the influence of outdoor wind on the vertical barrier properties of fireproof eaves. The results show that under the condition of no wind, when the extending length of the fireproof canopies is 0.6m, the effective barrier opening overflows vertically and the fire plume flows vertically; when the outdoor wind speed is 3m / s and the wind direction is horizontal On the right side, when the height of the window sill is 0.4m, the fireproof eaves with a length of 0.6m can effectively stop the vertical spread of the fire overflow.