Abstract：

For validating the feasibility that direct blowing pressurization substitutes that with special air supply well specified on Code for Fire Protection Design of Tall Buildings, conducts experiments in actual high-rise buildings in Beijing, Shanghai, Taiyuan and Dujiangyan. Based on the measured data, makes theoretical calculation and CFD simulation, and analyses the economic effects of this pressurization method. The results show that adopting this method can not only obtain the pressure required but also make stairwell pressure uniform, and moreover increase utilization area and reduce engineering costs.