Performance-based fire safety design of natural draft system of large-space building

Based on performance-based fire safety design,as the basic requirements of the smoke natural emission equal to the flue gas volume of output,use of fire smoke model and fire dynamics theory,calculate the physical parameters of fire flue gas in the large space building,put forward systematic theoretical calculation method on the fenestration area of natural smoke exhaust system in the large space.An indoor commercial walking street as example,by theoretical calculation,analysis of flue gas flow and smoke exhaust effects under the adverse fire scene,the existing exhaust port area of the building meet the exhaust requirements.