Estimation of directional design wind speeds via multiple population genetic algorithm. Issue 210 (March 2021)

• Record Type: Journal Article
• Authors: Wang, Jingcheng; Quan, Yong; Gu, Ming
• Is Part Of: Journal of wind engineering and industrial aerodynamics. Issue 210(2021)
• Publication Date: 2021-03
• Subjects: Wind-resistant design -- Design wind speeds -- Directional factors -- Multiple population genetic algorithm -- Extreme wind loads -- Building envelopes; Wind-pressure -- Periodicals; Buildings -- Aerodynamics -- Periodicals; Pression du vent -- Périodiques; Constructions -- Aérodynamique -- Périodiques; Buildings -- Aerodynamics; Wind-pressure; Periodicals
• DOI: 10.1016/j.jweia.2021.104534
• Languages: English
• ISSNs: 0167-6105

Abstract

Abstract: The implementation of the probability analysis method on extreme wind loads considering the directionality and uncertainties of the wind load effect coefficients and wind speeds can yield accurate design wind loads. However, it is difficult to popularize this method among structural designers because its theory and calculation process are complicated. The directional design wind speeds for a given city, which are more suitable in the commonly used simplified method for estimating the wind loads (i.e., the sector-by-sector method), are obtained in this study via multi-parameter optimization. A multiple population genetic algorithm program is established for optimization based on the time histories of the wind pressure coefficients obtained from numerous wind pressure taps of different rigid models. For different structural aerodynamic characteristics, the proposed directional design wind speeds can be combined with the sector-by-sector method to obtain results that are closest to the overall reference values of the design wind pressures of all pressure taps under a certain safety guarantee. The applicability, economy, and safety of the sector-by-sector method with the proposed directional design wind speeds are discussed in comparison to other simplified estimation methods using examples of Des Moines, IA, USA, and Shanghai, China, for non-typhoon and typhoon-prone climates, respectively. Highlights: An MPGA (multiple population genetic algorithm) program was proposed to determine the directional design wind speeds. The results of the MPGA program can significantly improve the effect of the sector-by-sector method. The use of the results of the MPGA program does not affect the concision of the sector-by-sector method. The results of the MPGA program can be easily reused to estimate the extreme wind pressures on different buildings.