EXPERIMENTAL STUDY ON NON-GAUSSIAN DISTRIBUTION CHARACTERISTICS OF FLUCTUATING WIND LOADS ON A LONG-SPAN CURVED ROOF

LI Zhiguo; PENG Yuxuan; QIN Chuan; YANG Xiongwei

doi:10.13204/j.gyjzG21012603

Volume 51 Issue 7

Nov. 2021

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LI Zhiguo, PENG Yuxuan, QIN Chuan, YANG Xiongwei. EXPERIMENTAL STUDY ON NON-GAUSSIAN DISTRIBUTION CHARACTERISTICS OF FLUCTUATING WIND LOADS ON A LONG-SPAN CURVED ROOF[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(7): 84-89,106. doi: 10.13204/j.gyjzG21012603

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EXPERIMENTAL STUDY ON NON-GAUSSIAN DISTRIBUTION CHARACTERISTICS OF FLUCTUATING WIND LOADS ON A LONG-SPAN CURVED ROOF

doi: 10.13204/j.gyjzG21012603

School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China

Received Date: 2021-01-26
Available Online: 2021-11-11

Abstract

Abstract

The non-Gaussian distribution characteristics of fluctuating wind loads on a long-span curved roof and the determination method for the peak factor of wind loads in the non-Gaussian distribation region were studied by using synchronous pressure measurement of rigid models in the turbulent flow field simulated atmospheric boundary layers. According to wind pressure data under three typical wind directions, the characteristics of mean wind pressure, fluctuating wind pressure, skewness and kurtosis of fluctuating wind loads on roof surfaces were analyzed, the differences between the probability density function of fluctuating wind loads and standard Gauss distribution curves were also compared. It was found that the skewness, kurtosis and probability density function of wind loads under different wind directions deviated from the standard Gaussian distribution, which had significant non-Gaussianity. Thus, the Hermite moment model was used to calculate the peak factor of wind loads for measured points in non-Gaussian region of curved roof, which provided more reasonable reference values of peak factors of wind loads for the complex long-span curved roof compared to the values of Load Code for the Design of Building Structures(GB 50009-2012).
- long-span curved roof,
- fluctuating wind load,
- non-Gaussianity,
- peak factor,
- wind tunnel test

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References

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