Abstract: In order to study the effect of the concrete casting sequence of the bridge panel on the structural performance of the curved beam bridge with corrugated webs, this paper relies on a project in Gansu Province, selects three concrete casting sequences for comparison during the construction stage of the curved beam bridge with corrugated webs. The results indicate that, regarding vertical deflection, the distribution patterns of the bottom slab deflections of the inner and outer box girders are consistent under varying casting sequences. The outer box girder experiences greater deflection than the inner box girder. Casting concrete first at the support regions results in the minimum mid-span deflection and the most uniform bridge alignment. Concerning section warping deformation, the longitudinal warping deformation values of the steel box girder bottom slab at mid-span are minimal and show negligible differences across conditions. In terms of normal stress distribution, the upper flange and bottom slab of the steel box girder at mid-span are significantly affected by the casting sequence. For shear stress, no significant differences in web shear stress were observed among the conditions; the shear stress varies linearly along the web height, with consistent shear force distribution ratios among webs under different casting sequences. Additionally, the web bottom shear stress exceeds that at the top, and the shear stress gradient along the height of the outer box girder web is lower than that of the inner box girder web.

Key words: corrugated steel web, composite curved beam bridge, structural performance