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Wind and Structures Volume 32, Number 3, March 2021 , pages 193-204 DOI: https://doi.org/10.12989/was.2021.32.3.193 |
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Evaluation of full-order method for extreme wind effect estimation considering directionality |
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Ying Luo, Guoqing Huang, Yan Han and C.S. Cai
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| Abstract | ||
| The estimation of the extreme wind load (effect) under a mean recurrence interval (MRI) is an important task in the wind-resistant design for the structure. It can be predicted by either first-order method or full-order method, depending on the accuracy and complexity requirement. Although the first-order method with the consideration of wind directionality has been proposed, less work has been done on the full-order method, especially with the wind directionality. In this study, the full-order method considering the wind directionality is proposed based on multivariate joint probability distribution. Meanwhile, considering two wind directions, the difference of the corresponding results based on the first-order method and full-order method is analyzed. Finally, based on the measured wind speed data, the discrepancy between these two methods is investigated. Results show that the difference between two approaches is not obvious under larger MRIs while the underestimation caused by the first-order method can be larger than 15% under smaller MRIs. Overall, the first-order method is sufficient to estimate the extreme wind load (effect). | ||
| Key Words | ||
| extreme wind load (effect); first-order method; full-order method; wind directionality; multivariate joint distribution; mean recurrence interval | ||
| Address | ||
| Ying Luo:School of Civil Engineering, Changsha University of Science & Technology, Changsha, China 410114 Guoqing Huang:School of Civil Engineering, Chongqing University, Chongqing, China 400044 Yan Han:School of Civil Engineering, Changsha University of Science & Technology, Changsha, China 410114 C.S. Cai:Department of Civil and Environmental Engineering, Louisiana State University, Baton Rouge, LA 70803, U.S.A. | ||