高层建筑电梯井内增压效应及防排烟措施

Study on Pressure Distribution in Elevator Shaft of a High-rise Building and Smoke Control Measures

根据高层建筑烟控理论,提出了耦合"活塞风效应"的防排烟系统送风压力设计原则。通过模拟电梯运动的活塞效应对火灾烟气流动的影响,分析推动力增压pin、牵引力增压pout,及各流段之间的静压差p1-p2,p3-p4的变化规律,并根据压差波动,划分电梯井内纵向气流压力特性,建立电梯井内压力分布模型,研究结果为优化现代建筑的防排烟系统压力设计和制定电梯协同疏散策略提供了理论基础。

Based on smoke-control theory in high-rise buildings, principles of air-supply pressure design are proposed to improve smoke control system to prevent the coupling impact on smoke propagation of piston effect and wind effect, etc. Through the analysis of simulating cases on air movement in shafts with elevator operation, the relationship between poison effect and pressurization has been verified to make sure of the law of some pressurizations, including impetus pressurization pin, traction pressurization pout and static pressure difference p1-p2 and p3-p4. Through the analysis of pressure fluctuation in elevator shafts, pressure characteristic model of vertical flow in the shafts has been established, which could be applied to optimize pressure design of smoke prevention and control system in modern buildings and provide theoretical basements for the development of elevator evacuation strategies.