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作者:

Fang, Genshen (Fang, Genshen.) | Liu, Zihang (Liu, Zihang.) | Pang, Weichiang (Pang, Weichiang.) | Zhao, Lin (Zhao, Lin.) | Xu, Kun (Xu, Kun.) | Cao, Shuyang (Cao, Shuyang.) | Ge, Yaojun (Ge, Yaojun.)

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Scopus SCIE

摘要:

The gust factor commonly is used in wind engineering community to convert mean wind speeds into gusty winds, which exhibit significant variability in real observations of typhoon winds. This study proposes a probabilistic gust factor model that accounts for uncertainties of wind speed statistics. The statistical characteristics of wind speed from nine typhoons, including the mean, standard deviation, skewness, kurtosis, power spectral density (PSD) parameter, peak factor, and gust factor, were examined. The effects of nonstationary characteristics in terms of time-varying mean wind speed and non-Gaussian attributes of fluctuating winds on the gust factor are discussed. These wind speed statistics were incorporated into a non-Gaussian moment-based translation model to perform the Monte Carlo simulation of peak factor and gust factor. The simulation results for different gust durations were juxtaposed with observations to substantiate the accuracy of the probabilistic model. Subsequently, a standardization framework for estimating site-specific probabilistic gust factor curves was developed. This approach was applied to determine the gust typhoon wind speed hazard curve at a real bridge site with flat open terrain. The present model enables the consideration of gust factor dispersion to achieve a probabilistic gust wind hazard curve and facilitate the development of performance-based wind engineering.

关键词:

Gust factor Nonstationary Non-Gaussian Typhoon Probabilistic model Uncertainty quantification

作者机构:

  • [ 1 ] [Fang, Genshen]Tongji Univ, State Key Lab Disaster Reduct Civil Engn, Shanghai 200092, Peoples R China
  • [ 2 ] [Liu, Zihang]Tongji Univ, State Key Lab Disaster Reduct Civil Engn, Shanghai 200092, Peoples R China
  • [ 3 ] [Zhao, Lin]Tongji Univ, State Key Lab Disaster Reduct Civil Engn, Shanghai 200092, Peoples R China
  • [ 4 ] [Cao, Shuyang]Tongji Univ, State Key Lab Disaster Reduct Civil Engn, Shanghai 200092, Peoples R China
  • [ 5 ] [Ge, Yaojun]Tongji Univ, State Key Lab Disaster Reduct Civil Engn, Shanghai 200092, Peoples R China
  • [ 6 ] [Pang, Weichiang]Clemson Univ, Dept Civil Engn, Clemson, SC 29634 USA
  • [ 7 ] [Xu, Kun]Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China

通讯作者信息:

  • [Zhao, Lin]Tongji Univ, State Key Lab Disaster Reduct Civil Engn, Shanghai 200092, Peoples R China;;

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来源 :

JOURNAL OF STRUCTURAL ENGINEERING

ISSN: 0733-9445

年份: 2024

期: 1

卷: 150

4 . 1 0 0

JCR@2022

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SCOPUS被引频次: 3

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