| Citation: | ZHAO Qiu, LI Tian-yu, CHEN Yi-yan. Calculation method for shear capacity of corrugated steel web composite box girder bridges[J]. Journal of Traffic and Transportation Engineering, 2026, 26(5): 154-165. doi: 10.19818/j.cnki.1671-1637.2026.044
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To develop a method for calculating the shear capacity of corrugated steel webs in bridges, experiments were conducted on three specimens with initial geometric imperfections and nine specimens with longitudinal residual stresses. The actual initial geometric imperfections and the distribution patterns of longitudinal residual stresses of corrugated steel webs were obtained. Based on these results, a finite element model incorporating the actual distribution of initial imperfections was developed and validated. Using the finite element model, extensive numerical calculations and parametric analyses were carried out, and reasonable values for the elastic buckling coefficient of corrugated steel webs in bridges were proposed. Based on the results of nonlinear finite element parametric analysis, a calculation formula for the shear stability capacity of corrugated steel webs for bridges was proposed. The analysis results indicate that the longitudinal residual stresses of corrugated steel webs are symmetrically distributed within one wavelength, with maximum values occurring at the midpoints of the bend segments, inclined plate segments, and flat plate segments, reaching approximately 24.3%-43.4% of the steel yield strength. The initial geometric imperfections of corrugated steel webs exhibit a half-wave sinusoidal distribution along the web height direction, and the amplitudes of the initial geometric imperfections are all less than the acceptance requirement of 1/750 of the web height specified in the code. When calculating the elastic shear buckling strength of corrugated steel webs for bridges, the global buckling coefficient should be taken as 40, and the combined buckling coefficient should be taken as 2. Compared with existing formulas, the proposed formula more accurately calculates the shear capacity of corrugated steel webs under local buckling and combined buckling control, while it is more conservative when applied to corrugated steel webs governed by global buckling.
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