Abstract: In order to study the shear lag effect of box girder with corrugated steel web plate, the longitudinal displacement warping function of box girder was established, which considered the shear deformation of corrugated steel web plate, longitudinal and inplane shear deformation of the top and the bottom flange. Based on the energy variational principle, an analytical solution was derived for the shear lag analysis of the box girder with corrugated steel webs. Results of model test, finite element analysis and variational solution method were compared with each other. Study shows that: the calculation results of the shear lag effect of box girder with corrugated steel webs are in a good agreement with those of the model test and finite element analysis; the effect area of shear lag only occurs at both sides near the loading position in a very small range; the closer the loading position near the bearing position, the more obvious the shear lag effect. The ratio of width to height has no effect on shear lag. The shear lag coefficient is linearly related with the ratio of width to span. The shear lag coefficient of box girder increases with flange width.

Key words: bridge engineering, corrugated steel webs, box girder, shear lag, variation, model test, the finite element

摘要： 为了研究波形钢腹板箱梁的剪力滞效应，建立了考虑波形钢腹板剪切变形的箱梁纵向位移翘曲函数，考虑顶底板的纵向、面内剪切变形能和钢腹板的剪切变形能；基于能量变分原理，推导了适用于波形钢腹板箱梁剪力滞分析的解析解；综合对比模型试验、有限元分析及变分解析解的计算结果。研究表明：推导的波形钢腹板剪力滞解析解计算结果与模型试验、有限元分析结果吻合；集中荷载加载工况下，剪力滞影响区域仅在加载位置左右两侧附近很小范围；加载位置越靠近支座位置，剪力滞效应越明显；宽高比对剪力滞无影响，剪力滞系数与宽跨比呈线性相关；翼缘板宽度增加后箱梁的剪力滞系数增大。

关键词: 桥梁工程, 波形钢腹板, 箱梁, 剪力滞, 变分, 模型试验, 有限元