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在较大的雷诺数范围内测量了不同宽高比箱形桥梁断面的三分力系数 ,研究了三分力系数雷诺数效应以及宽高比对断面三分力系数雷诺数效应的影响。流线型桥梁断面的阻力系数、升力系数都有明显的雷诺数效应。宽高比对断面的三分力系数雷诺数效应有明显的影响。低雷诺数风洞试验得到的三分力系数用于实桥分析时偏于保守
The third-component force coefficients of box-girder bridges with different aspect ratios were measured in the range of large Reynolds number. The effect of Reynolds number and the aspect ratio on Reynolds number effect of cross-section third-component force coefficient were studied. The drag coefficient and the lift coefficient of the streamlined bridge section all have obvious Reynolds number effect. The aspect ratio has a significant effect on the Reynolds number effect of the third component coefficient of the cross section. Low Reynolds wind tunnel test obtained third-component coefficient for real bridge analysis partial conservative