Study of aerodynamic characteristics of variable cross-section box girders under three-dimensional fluctuating wind field.

In H/B = 0.4 and H/B = 0.6 sections, the torque coefficients show a decreasing trend with increasing angle of attack, while in H/B = 0.3 section, the torque coefficients show an increasing and then decreasing trend with increasing angle of attack.

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Under the influence of fluctuating winds, only the near windward end of the upper and lower surfaces of the main girder showed a trend of negative pressure enhancement, while most of the rest of the section showed a trend of negative pressure weakening.

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