Study on Non-Gaussian Characteristics and Peak Factors of Fluctuating Wind Pressure on a Special-Shaped Curved Roof Structure

ZHANG Tao; GU Ziqi; CHEN Fubin

doi:10.13204/j.gyjzG22052611

Volume 53 Issue 4

Apr. 2023

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ZHANG Tao, GU Ziqi, CHEN Fubin. Study on Non-Gaussian Characteristics and Peak Factors of Fluctuating Wind Pressure on a Special-Shaped Curved Roof Structure[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(4): 94-101. doi: 10.13204/j.gyjzG22052611

Citation:

ZHANG Tao, GU Ziqi, CHEN Fubin. Study on Non-Gaussian Characteristics and Peak Factors of Fluctuating Wind Pressure on a Special-Shaped Curved Roof Structure[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(4): 94-101. doi: 10.13204/j.gyjzG22052611

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Study on Non-Gaussian Characteristics and Peak Factors of Fluctuating Wind Pressure on a Special-Shaped Curved Roof Structure

doi: 10.13204/j.gyjzG22052611

ZHANG Tao¹,
GU Ziqi¹,
CHEN Fubin^{1,2
,
,}

1. School of Civil Engineering, Changsha University of Science & Technology, Changsha 410114, China;
2. Key Laboratory of Safety Control of Bridge Engineering of Ministry of Education, Changsha University of Science and Technology, Changsha 410082, China

Received Date: 2022-05-26
Available Online: 2023-07-01

Abstract

Abstract

A pressure measurement test was conducted on a special-shaped curved roof in the atmospheric boundary layer wind tunnel, and the time series of fluctuating wind loads on the roof surface was obtained. The skewness, kurtosis, probability density, correlation coefficient and coherence of fluctuating wind pressure on the roof were analyzed. The peak factor method and Sadek-Simiu method were used to evaluate the peak factors of typical measurement points in the non-Gaussian regions. The results indicated that the skewness, kurtosis and probability density function of the fluctuating wind pressure at the leading edge of the roof and the place where the radian changed greatly was significantly different from the Gaussian distribution, and had obvious non-Gaussian characteristics. The correlation coefficients of measurement points decreased with the increase of distance between measurement points, and the correlation coefficients of measurement points at edges were higher than that of measurment points in the middle. The coherence of fluctuating wind pressure decreased with the increase of frequencies in the low frequency band, and the coherence maintained about 0.2 in the high frequency band. The coherence decreased with the increase of distance between measurement points. The peak factors obtained by Sadek-Simiu method could more safely estimate the extreme wind pressure of measurement points in the non-Gaussian region.
- wind tunnel test,
- non-Gaussian characteristic,
- correlation coefficient,
- coherence function,
- peak factor

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References(24)

References

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