室外风压、火风压对建筑物热压中和面位置的影响

首次提出风压与热压可完全分解 ,风压不改变热压本身的压力特性的观点 ,确定风压与热压共同作用下的新的中和面 ;提出火灾层火风压造成的空气渗进、烟气的排出过程属内部循环的观点 ;对于火灾烟气窜入建筑内部竖井通道的情况 ,则根据中和面上下各楼层总渗进、渗出平衡的观点 ,确定火灾引起的新的中和面位置。

Effect of Outdoor Wind Pressure and Fire Wind Pressure on the Neutral Surface Position of the Building Hot Pressure

A new concept that the wind pressure and the hot pressure could be fully decomposed, and the pressure would not change the characteristics of the hot pressure is put forward. The new neutral surface coacted by these two pressures could be determined. Authors also consider that the air diffusion and the smoke emitting caused by fire wind pressure in fire layer are a process of internal recycling. As to the status of fire smoke fleeing into the vertical shaft of the building, the new neutral surface position formed by the fire could be determined according to the equilibrium of total amount of diffusion in and out from different floors up-and-down the neutral surface.