呼吸式玻璃幕墙火灾竖向蔓延阻隔方法对比研究

摘要

Using FDS, 9 fire scenes were simulated, to compare the methods of stopping fire vertical spreading in breathing-type glass curtain. The simulation showed the temperature distribution on the internal and external curtain wall, and center temperature-time distribution on the external wall of the room above the floor on fire under different window sill, fireproof eave, thermal channel width or entrance height. Results showed that, the fireproof eave has bigger effect on the smoke blocking than window sill; increas?ing the width of thermal channel within limits can lower the highest temperature of the entrance on the internal wall; entrance height and ventilation volume have small influence on the temperature.%利用FDS软件模拟,设计了9种工况,对比研究了对呼吸式玻璃幕墙热通道内火灾竖向阻隔的方法,通过模拟计算分析,获得了窗槛墙、防火挑檐、热通道宽度及进出口高度不同时内外幕墙壁面温度分布及着火层上层房间外墙中心温度随时间的变化关系.结果表明,防火挑檐对烟气的阻挡作用较设置窗槛墙明显;热通道在一定范围内增加宽度会降低内幕墙开口处的最高温度;进出风口高度和通风量对内幕墙温度降低影响较小.