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Wind characteristics atop Shanghai Tower during typhoon Jongdari using field monitoring data
Journal of Building Engineering ( IF 6.7 ) Pub Date : 2020-09-17 , DOI: 10.1016/j.jobe.2020.101815
Jie Wu , Ningtao Hu , You Dong , Qilin Zhang , Bin Yang

In this paper, detailed analysis of field wind data atop the Shanghai Tower is conducted to investigate the wind characteristics evolution generated by typhoon Jongdari, which can provide useful information for high altitude wind features in dense building landform to aid wind-resistant design of 600 m + super-tall buildings. The necessity of data preprocessing is discussed, and some precautions for processing wind directions are pointed out. Correlations of the mean wind speeds in different averaging times are analyzed using a non-stationary wind velocity model. The fluctuation wind characteristics at evolutional stages of the typhoon, including turbulence intensity, gust factor, integral scale of turbulence and power spectrum, are discussed and compared with several typhoons measured atop other super-tall buildings. Based on analysis, the ratio of the mean wind speeds between 10 min and 1 h averaging times remains stable. It is found that there is a slight difference between the linear and nonlinear fitting of three longitudinal parameters (i.e., the gust factor, turbulence intensity and gust duration time), but obvious error exists as to the linear fitting of the lateral parameters. Statistical results of the turbulent integral scale reflect relatively violent excitation of the turbulent wind to the structure, and the spectra of turbulent velocity are associated with various characteristics in different stages of the typhoon.



中文翻译:

利用现场监测数据分析台风钟达里期间上海塔上的风特征。

本文通过对上海中心大厦顶风场数据的详细分析,研究了台风钟达里所产生的风特征演变,为稠密建筑地貌中的高空风特征提供了有用的信息,有助于600 m的抗风设计。 +超高层建筑。讨论了数据预处理的必要性,并指出了处理风向的一些注意事项。使用非平稳风速模型分析了不同平均时间中平均风速的相关性。讨论了台风演变阶段的起伏风特征,包括湍流强度,阵风因子,湍流积分比例和功率谱,并与在其他超高层建筑上测得的几种台风进行了比较。根据分析,平均风速在10分钟至1小时的平均时间之间的比率保持稳定。发现三个纵向参数(即阵风因子,湍流强度和阵风持续时间)的线性拟合和非线性拟合之间存在细微差异,但横向参数的线性拟合存在明显的误差。湍流积分标度的统计结果反映了湍流对结构的相对强烈的激发,并且湍流速度谱与台风不同阶段的各种特征有关。湍流强度和阵风持续时间),但在横向参数的线性拟合方面存在明显的误差。湍流积分标度的统计结果反映了湍流对结构的相对强烈的激发,并且湍流速度谱与台风不同阶段的各种特征有关。湍流强度和阵风持续时间),但在横向参数的线性拟合方面存在明显的误差。湍流积分标度的统计结果反映了湍流对结构的相对强烈的激发,并且湍流速度谱与台风不同阶段的各种特征有关。

更新日期:2020-10-08
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