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Comparisons of Aerodynamic Data with the Main Wind Force-Resisting System Provisions of ASCE 7-16. Ⅰ: Low-Rise Buildings
| 题名： | Comparisons of Aerodynamic Data with the Main Wind Force-Resisting System Provisions of ASCE 7-16. Ⅰ: Low-Rise Buildings |
| 正文语种： | eng |
| 作者： | Wang, Jin;Kopp, Gregory A. |
| 作者单位： | Univ Western Ontario Fac Engn Boundary Layer Wind Tunnel Lab London ON N6A 5B9 Canada;Univ Western Ontario Fac Engn Boundary Layer Wind Tunnel Lab London ON N6A 5B9 Canada |
| 关键词： | Wind loads;Building aerodynamics;Mid-rise buildings;High-rise buildings;ASCE 7 |
| 摘要： | The purpose of this study is to investigate the effects of building geometry on tall-building aerodynamics, accompanying the analysis for low-rise buildings found in the companion paper. Aerodynamic data for total of 30 rectangular-plan buildings were obtained in wind tunnel experiments. This work tested building configurations with plan aspect ratios, L/B (where L is the horizontal dimension parallel to the wind and B is the across-wind dimension) ranging from 0.25 to 4 and height ratios, H/W (where H is roof height and W is the least horizontal dimension) ranging from 1 to 12. Additionally, this work made systematical comparisons with wind load provisions in Chapter 27 of ASCE 7-16. Buildings with ratios of H/W > similar to 4 have aerodynamic coefficients that are approximately constant, which means that this can be a practical aerodynamic definition of high-rise buildings. There is continuous variation of the aerodynamic coefficients for H/W < 4 such that differentiation of mid-rise and low-rise buildings may be considered as arbitrary from an aerodynamics perspective. Wind load coefficients for mid-rise buildings are observed to be lower than for high-rise buildings. However, for both mid-rise and high-rise buildings, largest load coefficients are observed for L/B similar to 0.67. The plan ratio of L/B captures the variation of the load coefficients for high-rise buildings. For lower buildings, both L/B and H/W ratios are needed to define the wind loads. (C) 2020 American Society of Civil Engineers. |
| 出版年： | 2021 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | 147 |
| 期： | 3 |
| 页码： | 04020347.1-04020347.20 |
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