《建筑防烟排烟系统技术标准》GB 51251-2017中若干条文分析

Discussion on Several Provisions of Technical Standard for Smoke Management Systems in Buildings:GB 51251-2017

《建筑防烟排烟系统技术标准》GB 51251—2017立足实用和可靠的设计原则,得到了建筑消防设计人员和火灾学者的高度关注.通过对标准若干条款仔细研读,运用理论分析和文献分析的方法,对净高小于或等于6 m的着火房间排烟量、防烟分区的临界蓄烟面积、走道排烟设置、楼梯间顶部固定窗设置进行了仔细分析和公式推导,给出了典型部位具体的参数数值.本文研究可为防排烟规范的修订完善提供一定的指导.

Based on the practical and reliable design principles,Technical Standard for Smoke Management Sys-tems in Buildings:GB 51251—2017 has been highly concerned by building fire protection designers and fire scholars.By studying several provisions of the standard carefully and using the methods of theoretical analysis and literature analysis,the authors perform a careful analysis and formula derivation on the flow rate of smoke exhaust in fire rooms with a net height of less than or equal to 6 m,the critical smoke reservoir area,the smoke exhaust setting of the corridor,and the fixed window for fire forcible entry setting at the top of the stairwell,and give specific parameter values of typical parts.The research in this paper can provide some guidance for the revision and improvement of Technical Standard for Smoke Management Systems in Buildings.