冬季寒冷地区超高层建筑防烟楼梯间热压效应研究

Study on stack effect on smoke-proof stairwell of ultra-high-rise building in cold areas in winter

采用现场实测与数值模拟方法,研究热压作用对超高层建筑楼梯间压差分布的影响。通过对楼梯间与前室压差分布进行实测,指出由于避难层对楼梯间的分隔作用,使得压差在不同分区内,呈现错位增长的分布规律。用Fluent模拟对实验研究进行补充,通过拟合模拟数据,对原有热压计算公式进行修正,提出适用于有一处避难层的超高层建筑的热压差计算公式。

The paper used the method of field measurement and numerical simulation to study the effect of stack effect on the pressure difference distribution in the stairwell of aultra-highrise building.By choosing typical ultra-high-rise building to carry out the measurement research,obtaining the pressure distribution between the stairwell and atria,the paper has quantitatively analyzed the influence of the stack effect.It is pointed out that due to the separation effect of the refuge floor on the stairwell,the pressure difference in different zones shows a distribution law of dislocation growth.Combined with the results of numerical simulation,the original theoretical calculation formula of"stack effect"was revised,and a calculation formula of pressure difference suitable for super high-rise buildings was proposed.