Studies on spatial correlation of wind loads on streamlined closed box girder cross-section

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Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (2) : 76-80,1.

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Studies on spatial correlation of wind loads on streamlined closed box girder cross-section

ZHANG Guan-hua1,2; ZHAO Lin1; GE Yao-jun1

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Abstract

The simultaneous measurement of wind load pressure on streamline closed box girder cross-section were test with pressure scanning valve in Tongji University wind tunnel, the spatial distribution conditions of wind load were understood, the reasons of the phenomenon were explored, compared with the different wind average speed, turbulence intensity, wind attack angle and span-wise distance; the spatial correlation on wind speed and its load effect were in-depth study from two aspects of time domain and frequency domain; with the correlation coefficient and coherence function, the mechanism and influence factors were analyzed; it were elaborated and confirmed that the span-wise correlations of lift force and torsion moment are much greater than the ones of wind speed and drag force, and there is the similar law of the correlation lift force and torsion moment, the similar law to wind speed and drag force; shortcomings of the traditional random aerodynamic buffeting theory were verified.

Key words

aerodynamic loads / spatial correlation / coherence function / correlation coefficient / turbulence

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ZHANG Guan-hua;ZHAO Lin;GE Yao-jun. Studies on spatial correlation of wind loads on streamlined closed box girder cross-section [J]. Journal of Vibration and Shock, 2012, 31(2): 76-80,1