Wind load characteristics of a large-span steel structure factory building under downburst
Shi Zhang,Kexin Guo,Xiaoda Xu,Qingshan Yang,Zengzhi Qian,Daxing Zhou,Yuji Tian
Abstract
The understanding and research on the wind field characteristics of downbursts and the wind loads on structures
under their influence have emerged as pivotal research topics in wind engineering. This paper employs a simulator to generate
downburst winds and investigates the wind load characteristics on the surface of a large-span steel structure factory building
under such conditions. Initially, based on the theory of impinging jet, a downburst wind field is generated, revealing the spatial
distribution patterns of wind speed, wind direction, and wind pressure. The validation of the simulated wind field is confirmed
by comparing experimental results with measurements and theoretical models. Subsequently, the wind load characteristics of the
factory building model are studied under the influence of downbursts by varying the radial distance of the downburst, wind
direction angle and ground surface roughness. The results indicate that within the core region of the downburst, the model is
primarily impacted by high pressure, resulting in relatively large positive surface wind pressures and forces. Conversely, in the
horizontal diffusion area of the downburst, the model is predominantly influenced by horizontal wind speeds. Specifically, near
the radial distance of the diameter of the simulator, the maximum negative pressure emerges at the leading edge of the roof's
windward side, corresponding to the occurrence of the maximum lift force, lateral force, and overturning moment. In addition,
higher roughness substantially elevates the wind pressure and wind force coefficients on the factory.
Shi Zhang — School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, No.1 Zhanlanguan Road, Xicheng District 100044 Beijing, China
Kexin Guo — School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, No.1 Zhanlanguan Road, Xicheng District 100044 Beijing, China
Xiaoda Xu — Academician Bin Zeng Studio, Central Research Institute of Building and Construction Co., Ltd. MCC, No.33 Xitucheng Road, Haidian District 100088 Beijing, China
Qingshan Yang — School of Civil Engineering, Chongqing University, No. 83 Shabei Street, Shapingba District, 400045 Chongqing, China
Zengzhi Qian — China Railway Construction Group Co., No. 20 Shijingshan Road, Shijingshan District, 100040 Beijing,China
Daxing Zhou — China Railway Construction Group Co., No. 20 Shijingshan Road, Shijingshan District, 100040 Beijing,China
Yuji Tian — School of Civil Engineering, Beijing Jiaotong University, No. 3 Shangyuan Village, Haidian District 100044 Beijing, China
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