Wind and Structures

Techno-Press (테크노프레스)
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Evaluation of full-order method for extreme wind effect estimation considering directionality

  • Luo, Ying (School of Civil Engineering, Changsha University of Science & Technology) ;
  • Huang, Guoqing (School of Civil Engineering, Chongqing University) ;
  • Han, Yan (School of Civil Engineering, Changsha University of Science & Technology) ;
  • Cai, C.S. (Department of Civil and Environmental Engineering, Louisiana State University)
  • Received : 2020.05.17
  • Accepted : 2021.02.10
  • Published : 2021.03.25
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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).

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References

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