改造工程中楼梯间防烟方式的FDS模拟研究

A FDS Simulation Study on the Way of Preventing Smoke from the Staircase in a Project Being Renovated

在改造工程中,低层建筑的楼梯间无法满足规范要求的自然排烟方式,若严格按照国家标准的要求又要增加前室,涉及结构、土建方面改造工程量较大。运用FDS模拟在楼梯间采用直灌式加压送风系统或者在楼梯间顶层设有一定的自然通风有效面积的防烟效果,与现行规范要求相比较,研究在不具备设置加压送风竖井的条件时,楼梯间采用直灌式加压送风系统的可行性。

In a project being renovated,especially in low building staircases cannot meet the requirements specification of natural smoke exhausting. Being renovated in strict accordance with the national standards,a renovation project needs a large amount of work. The FDS simulation is done in the stairwell with a direct pressurized air system or in the stairs top with a certain natural ventilation area in accordance with the current specification. Compared with a smoke effect study in which it does not have to set a pressurization ventilation shaft,this simulation study intends to figure out whether it is feasible for the staircase to be direct with a pressurized air system.