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Wind and Structures Volume 30, Number 2, February 2020 , pages 165-180 DOI: https://doi.org/10.12989/was.2020.30.2.165 |
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Influence of a community of buildings on tornadic wind fields |
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Zhi Li, Ryan Honerkamp, Guirong Yan and Ruoqiang Feng
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| Abstract | ||
| To determine tornadic wind loads, the wind pressure, forces and moments induced by tornadoes on civil structures have been studied. However, in most previous studies, only the individual building of interest was included in the wind field, which may be suitable to simulate the case where a tornado strikes rural areas. The statistical data has indicated that tornadoes induce more significant fatalities and property loss when they attack densely populated areas. To simulate this case, all buildings in the community of interest should be included in the wind field. However, this has been rarely studied. To bridge this research gap, this study will systematically investigate the influence of a community of buildings on tornadic wind fields by modeling all buildings in the community into the wind field (designated as \"the Community case under straight-line winds\") are also simulated. The results demonstrate that the presence of a number of buildings completely destroys the pattern of regular circular strips in the distribution of tangential velocity and pressure on horizontal planes. Above the roof height, the maximum tangential velocity is lower in the Community case under tornadic winds than that in the Single-building case under tornadic winds because of the higher surface friction in the Community case; below the roof height, greater tangential velocity and pressure are observed in the Community case under tornadic wind fields, and more unfavorable conditions are observed in the Community case under tornadic winds than under the equivalent straight-line winds. | ||
| Key Words | ||
| translating tornadic wind fields; computational fluid dynamics; gable-roofed buildings; straight-line wind | ||
| Address | ||
| Zhi Li:Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, 1401 Pine St, Rolla, MO 65409 Ryan Honerkamp:Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, 1401 Pine St, Rolla, MO 65409 Guirong Yan:Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, 1401 Pine St, Rolla, MO 65409 Ruoqiang Feng: Structural Engineering Service Dept., Sumitomo Mitsui Construction co., ltd., Tsukuda, Chuou-ku, Tokyo 104-0051, Japan | ||