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Definition of Wind Profiles in ASCE 7

机译:ASCE 7中风廓线的定义

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One of the major changes in the recent versions of ASCE 7 concerns the introduction of three-second gust as the reference wind speed. The three-second gust speed is derived using Durst's model in terms of the mean wind speed and turbulence intensity given in the former versions of ASCE 7. A review of these profiles suggests a notable inconsistency in the embedded relationship among the wind profiles in ASCE 7-98, which is also apparent when these are compared to the profiles in major international codes and standards. To overcome this inconsistency in the definition of wind profiles, this paper proposes a modified turbulence intensity profile and suggests retaining the current mean wind and gust speed profiles. This modification not only ensures consistency in the definition of wind profiles in ASCE 7-98, but also renders the definition of these profiles consistent with those in major international codes and standards.
机译:最新版本的 ASCE 7 的主要变化之一是引入三秒阵风作为参考风速。三秒阵风速度是使用 Durst 模型根据 ASCE 7 早期版本中给出的平均风速和湍流强度得出的。对这些剖面的回顾表明,ASCE 7-98中风廓线之间的内在关系存在明显的不一致,当这些剖面与主要国际规范和标准中的剖面进行比较时,这一点也很明显。为了克服风廓线定义的这种不一致,本文提出了一种修正的湍流强度剖面,并建议保留当前的平均风速和阵风风速剖面。这一修改不仅确保了ASCE 7-98中风廓线定义的一致性,而且使这些剖面的定义与主要国际规范和标准中的定义一致。

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