Wind tunnel simulation of a thousand-meter high twisted wind flow

被引：0
作者：
Zheng C. [1 ,2 ]
Zhang K. [1 ,3 ]
Liu Z. [1 ,2 ]
Wu Y. [1 ,2 ]
Chen W. [1 ,2 ]
机构：
[1] Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin
[2] Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters (Harbin Institute of Technology), Ministry of Industry and Information Technology, Harbin
[3] China Academy of Building Research, Beijing
来源：
Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology | 2019年 / 51卷 / 12期
关键词：
Ekman spiral; Thousand-meter high twisted wind flow; Vane system; Wind tunnel test; Wind twist angle;
D O I：
10.11918/j.issn.0367-6234.201902072
中图分类号：
学科分类号：
摘要：
To investigate the effect of the twisted wind flow on the wind effects of megatall buildings, a modified passive simulation technology, i.e., a combination of a self-developed vane system and the traditional passive simulation devices, is developed to simulate the twisted wind flow with a length scale of 1:1 000. The mean wind speed and wind direction profiles determine by the field measurement, and the turbulence intensity profiles stipulated in the Chinese Load Code are determined to be the target wind characteristics for the thousand-meter high twisted wind flow. Then the effects of different devices on the twisted wind flow characteristics are analyzed in detail. Results show that the mean wind speed profile for the simulated twisted wind flow followed the power law with an exponent of 0.09, and the mean wind direction profile agrees well with the Ekman spiral with a maximum error of 1.5°. The simulated turbulence intensity profile fluctuate within those of the exposure categories C and D in Chinese Load Code, indicating the reasonability of the results. A good consistent wind property is obtained in an area of 2.5×1.5 m2 around the center of the turntable with a range of -0.5 - 2 m in the streamwise direction and -0.75 - 0.75 m in the span wise direction. Thus, the simulated twisted wind flow can provide a solid basis for the further study of the characteristics of wind loads and wind-induced responses for thousand-meter high mega tall buildings, as well as systematic evaluation of the effects of twisted wind flow. © 2019, Editorial Board of Journal of Harbin Institute of Technology. All right reserved.
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页码：71 / 78
页数：7
相关论文
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