超高层建筑周围风场特性实测研究

Field measurement of wind field characteristics around super high-rise buildings

摘要:

为探究超高层建筑周围风场特性，以天津高银117大厦为例，通过DZZ2型采集系统进行现场实测，对该大厦周围的平均风速、脉动风速、湍流强度、湍流积分尺度、Von Karman谱等风场特性进行分析。结果表明：顺风向及横风向脉动风速变化规律不服从标准高斯分布；顺风向及横风向湍流强度与平均风速呈负相关，且其变化程度与平均风速范围有关；顺风向及横风向湍流积分尺度均随平均风速的增加而增大；Von Karman谱对低频范围内超高层周围风场特性描述较为准确。

Abstract:

To explore the characteristics of wind field around super high-rise buildings, the Gaoyin 117 Building in Tianjin was taken as an example in this paper.The field measurement was conducted through DZZ2 acquisition system to analyze the wind field characteristics around the building, i.e., the average wind speed, the fluctuating wind speed, the turbulence intensity, the turbulence integral scale, and the Von Karman spectrum.The results showed that the variation of longitudinal and lateral fluctuating wind speed does not follow the standard Gaussian distribution; the longitudinal and lateral turbulence intensity is negatively correlated with the average wind speed, and its change degree is related to the range of average wind speed; the longitudinal and lateral integral scale of turbulence increases with the increase of average wind speed; the Von Karman spectrum is more accurate in describing the wind field characteristics around the super high-rise building in a low frequency range.