Numerical Simulation Study On Reynolds Number Effect Of Aerostafic Coefficients Of Representative Bridge Sectlons

The three component coefficients are necessary parameters in Bridge Wind Analysis.They are very important parameters in buffeting responses analysis,galloping analysis and stability analysis. The value of the three component coefficients affects the precision of the bridge Wind Analysis directly. Therefore, it has great significance to calculate the three component coefficients of bridge deck accuratly. The scope of reynolds number of this paper is to consider the temperature in different seasons(-30-40℃), the actual wind speed(10-70m/s), Characteristic length(different sizes of Real bridge and the wind tunnel test models), Several factors caused the range of Reynolds numbers. In this paper, research three typical bridge deck,such as flat box beam, (?)-type section, Blunt box section.under the attack angle of-6°,-3°,0°,3°,6°, The three component coefficients Reynolds number effect. This article does the following areas of work:1. Research the effect of reynolds number to three kinds of typical bridge section under different angle attack,such as flat box beam,(?)-type,blunt box beam section. And given the flow field characteristics graph under different reynolds number.2. Research three component coefficients reynolds number effect of three kinds of typical bridge section under real bridge, obtained three component coefficientsunder is not a constant coefficient, but a range of changes.3. Based on the three component coefficients reynolds number effect, propose a model downscaling critical calculation formula which can control the error of the three component coefficients in the wind tunnel test.