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为研究多栋高层建筑顶部的风场在台风影响下的风特性和相关性,在2013年的强台风“天兔”的登陆过程中,对海边三栋相邻的高层建筑顶部的台风风场进行了现场实测。选取适当的实测风场数据进行分析,统计了三栋建筑顶部的平均风特性和脉动风特性参数,探讨了分别位于三栋建筑顶端的3个测点的脉动风速之间的空间相关系数和相干函数。分析结果表明:此次台风中,三栋建筑顶部的平均风速和平均风向差异较小,随时间的变化趋势相似;脉动风特性的统计平均值差异较小,说明各测点之间的风速具有相关性;三栋建筑顶部测点相互之间的空间相关系数值较小,其平均值随着两测点之间距离的增加而减小;相干函数随着频率的增大而逐渐衰减,当频率接近零时,两测点间的距离越大,其相干函数值越小。
In order to study the wind characteristics and correlation under the influence of typhoon in the wind field at the top of many high-rise buildings, during the landing process of the 2013 typhoon “Tian-rabbit”, typhoons on the top of three adjacent high-rise buildings on the beach Wind field conducted a field test. According to the analysis of the measured wind field data, the average wind characteristics and fluctuating wind characteristics at the top of the three buildings were calculated. The spatial correlation coefficient and coherence between the fluctuating wind velocities at the three measuring points at the top of the three buildings were discussed function. The results show that the average wind speed and average wind direction at the top of the three buildings in this typhoon are quite small, and the trend with time is similar. The statistical average of the fluctuating wind characteristics is small, indicating that the wind speed between the measuring points has The correlation coefficient between the two measuring points at the top of the three buildings is small, and the average value decreases with the increase of the distance between the two measuring points. The coherence function gradually decays with increasing frequency. When the frequency is close to zero, the larger the distance between two measuring points, the smaller its coherence function value.