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建立了6个超高层建筑烟囱效应的测试模型,分析了室内外温差、内隔断、电梯转换及高大空间对烟囱效应的影响,同时对国家金融信息中心大厦进行了烟囱效应模拟分析。计算结果表明:外幕墙压差分布规律与测试模型类似,沿高度总体呈线性变化,但在加强层处出现跳跃,270m高度位置出现高大幕墙空间时,外幕墙压差由负压变为正压,再随高度增加变为负压;内幕墙压差基本不随高度增加而改变;设置转换的电梯可较好地将压差控制在±10Pa左右,未设置转换的电梯及其前室门在竖井上下部区段,压差超出了ASHARE建议的25Pa限值。
The test model of six chimney effects in super high-rise building was established. The influence of indoor and outdoor temperature difference, inner partition, elevator conversion and tall space on the chimney effect was analyzed. Simultaneously, the chimney effect simulation of National Financial Information Center Building was carried out. The calculation results show that the external wall pressure distribution is similar to that of the test model, and varies linearly along the height but jumps at the reinforcement layer. When the tall curtain wall space appears at the height of 270m, the pressure difference of the external curtain wall changes from negative pressure to positive pressure , And then increase with the increase of negative pressure; interior wall pressure difference does not increase with the basic increase; set the conversion of the elevator can better control the pressure difference of ± 10Pa or so, not set the conversion of the elevator and its front door in the shaft In the upper and lower sections, the pressure differential exceeds the 25Pa limit recommended by ASHARE.