Moment and shear load distribution are important in bridge design. Most existing studies have focused on the distribution of girders under vehicle loading, neglecting the dead load distribution between the webs of multicell box-girders. Through the “Sum of Local Internal Forces” function, the shear force of each web in the multicell box-girder 3D finite element model was extracted and analysed using the dead load shear force distribution factor. The research parameters include the slope of the web, support condition, and cell number with respect to the dead load shear force distribution factor. The results indicate that the dead load shear distribution in the webs of multicell box-girders is uneven. The outermost inclined web bears a shear force greater than the average shear force, which must be considered in bridge design.

中文翻译：

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多单元斜腹箱形箱梁桥腹板中恒载剪力分布的数值分析

弯矩和剪力荷载的分布在桥梁设计中很重要。现有的大多数研究都集中在车辆载荷下的大梁分布，而忽略了多单元箱形梁腹板之间的静载分布。通过“局部内力总和”功能，提取多单元箱梁3D有限元模型中每个腹板的剪力，并使用恒载剪力分配因子进行分析。研究参数包括腹板的斜率，支撑条件和相对于恒载剪切力分布因子的孔数。结果表明，多单元箱梁腹板中的恒载剪力分布不均匀。最外侧的倾斜腹板承受的剪力大于桥梁设计中必须考虑的平均剪力。