关注超高层建筑烟囱效应可能引发的安全问题

Safety issues caused by stack effect in super high-rise buildings

针对寒冷地区超高层建筑,分析了烟囱效应的作用原理与影响因素。指出热压与烟囱效应并非等同概念,烟囱效应的实际效果不仅取决于热压,还受围护结构的密闭性及建筑内部隔断影响。阐述了烟囱效应可能引发的安全问题。分析了提高围护结构的密闭性、增加建筑内部隔断对减小烟囱效应危害的实际效果。指出治理烟囱效应危害的最简单易行、最可靠的办法是从建筑设计开始,做好建筑内部的水平隔断、竖直隔断,使作用于建筑内的热压被层层分割,并被内部隔断的阻力所消耗。

In view of the super high-rise buildings in the cold region, analyses the principle and influencing factors of stack effect. Points out that the thermal pressure and the stack effect are not the same concept. The actual effect of the stack effect depends on the thermal pressure and air tightness of the envelopes and internal partitions of the building. Expounds the safety issues resulted in by the stack effect. Analyses the actual effect of increasing the air tightness of building envelope and inside partitions on reducing the risk of the stack effect. Considers.that the easiest and the most reliable way of controlling the stack effect is to strengthen the horizontal and vertical partitions in buildings from building design. So that the thermal pressure is divided gradually by internal partitions and consumed by the internal resistance.