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The “Durst curveDurst curve” is widely used to estimate gust factorGust factor which relates gust wind speeds between different averaging periods. Gust factorGust factor is a function of mean wind speed, turbulenceTurbulence intensity, integral length scale, and observation period for the mean wind speed. Durst curveDurst curve is applicable for a specific wind conditionWind conditions and therefore does not vary with the aforementioned parameters. On the other hand, ESDU provides a detailed approach to calculate gust factorGust factor for different wind characteristics. The ESDU approach is computationally demanding, which poses challenges for mass use. In this study, an adjustment to the Durst curveDurst curve is proposed that is applicable for different wind conditionsWind conditions including model scales. The adjusted Durst curveDurst curve is then compared with full-scale and wind tunnelWind tunnel data as well as the ESDU approach. It is evident from the comparison that the adjusted Durst curveDurst curve would be a good alternative to the ESDU approach for easier adaptation with much less computation than ESDU, allowing implementation in wind loading standards.

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Importance of Approach Flow Conditions on Gust Factor

  • 会议论文

  • 发表日期：

    2026年

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  • Jubayer Chowdhury,
  • David Banks

摘要

The “Durst curveDurst curve” is widely used to estimate gust factorGust factor which relates gust wind speeds between different averaging periods. Gust factorGust factor is a function of mean wind speed, turbulenceTurbulence intensity, integral length scale, and observation period for the mean wind speed. Durst curveDurst curve is applicable for a specific wind conditionWind conditions and therefore does not vary with the aforementioned parameters. On the other hand, ESDU provides a detailed approach to calculate gust factorGust factor for different wind characteristics. The ESDU approach is computationally demanding, which poses challenges for mass use. In this study, an adjustment to the Durst curveDurst curve is proposed that is applicable for different wind conditionsWind conditions including model scales. The adjusted Durst curveDurst curve is then compared with full-scale and wind tunnelWind tunnel data as well as the ESDU approach. It is evident from the comparison that the adjusted Durst curveDurst curve would be a good alternative to the ESDU approach for easier adaptation with much less computation than ESDU, allowing implementation in wind loading standards.