基于有限元法给出了一种通用的建模方法分析箱梁的剪力流,提出了在悬臂梁上进行两点加载获得纯剪面的简化模式。使用ANSYS对一薄壁箱形截面进行剪力流分析,并与传统的用于箱梁剪力流分析的理论公式法进行对比,结果表明有限元法分析剪力流具有通用性强、计算速度快精度高等优点,同时可应用于复杂截面和复合材料截面的剪力流分析。 Based on the finite element method, a general modeling method is presented to analyze the shear flow in the box girder. A simplified model of pure shearing at two points on the cantilever is proposed. The shear flow analysis of a thin-walled box section with ANSYS is carried out and compared with the traditional theoretical method for shear flow analysis of box girder. The results show that the finite element method has the advantages of universal versatility, computational speed High accuracy, etc. It can also be applied to shear flow analysis of complex section and composite section.