民用建筑典型场所机械排烟口分布因素分析

Distribution of Mechanical Smoke Exhaust Inlets in the Typical Rooms of Civil Architectures

参照GB51251—2017《建筑防烟排烟系统技术规范》,结合该规范正式实行后实际工程设计中出现的问题和解决方案,主要分析在民用建筑排烟系统工程设计中,对于建筑内走道在不同宽度、空间净高及排烟风口布置方式等条件下,一个防烟分区内符合该规范要求时,所要求的排烟风口数量最小值的变化规律。并由此引申讨论了基于GB51251—2017要求及给出的计算方法,地下室汽车库在不同空间净高下排烟口数量的最小值的变化规律。

Based on the Technical Code for Smoke Management Systems in Buildings(GB51251—2017),combining the problems and solutions in the actual engineering design after the formal implementation of the CODE,the paper analyzes the change law of the minimum smoke exhaust inlet quantities that are required and limited in a smoke bay,under with various levels of aisle width,clear height and smoke exhaust inlets distribution.The change law of smoke exhaust inlets in an underground garage under the different clear heights is expounded,according to the requirement and calculation methods given from GB51251—2017.