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Estimating Exposure Roughness Based on Google Earth
| 题名： | Estimating Exposure Roughness Based on Google Earth |
| 正文语种： | eng |
| 作者： | Yu, Jianhan;Stathopoulos, Ted;Li, Mingshui |
| 作者单位： | Concordia Univ Dept Bldg Civil & Environm Engn Montreal PQ H3G 1M8 Canada;Concordia Univ Ctr Zero Energy Bldg Studies Dept Bldg Civil & Environm Engn Montreal PQ H3G 1M8 Canada;Southwest Jiaotong Univ Res Ctr Wind Engn Sch Civil Engn Chengdu 610031 Sichuan Peoples R China |
| 关键词： | Exposure roughness;Design wind load;Wind codes and standards;Google Earth Pro |
| 摘要： | Exposure roughness is significant in the evaluation of design wind loads. The roughness length (z(0)) is a key parameter to determine the exposure coefficient. In current wind load provisions, z(0) is determined generally according to the exposure categories. However, subjective interpretation of upstream roughness by designers may lead to disagreements of exposure type. To address this issue, a more accurate method of determining the value of z(0) is proposed in this paper. This approach uses morphometric methods in combination with the application of Google Earth Pro or equivalent. A three-dimensional modeling methodology is proposed which is based on the twodimensional images captured in Google Earth Pro. The city center of London, UK and Tampa International Airport, US are chosen as case studies to verify the accuracy of the proposed method by comparison with available measured data. The comparison shows that this method works well for the estimation of z(0) of upstream exposure. (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： | 04020353.1-04020353.12 |
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