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箱梁因其箱形截面具有良好的结构性能,比如,截面抗扭刚度大、能有效地抵抗正负弯矩、施工方便、截面使用效率高等,因而在现代各种桥梁中得到了广泛应用。因此,对箱梁的各种受力特性应有明确的了解,其中横向内力也是混凝土箱梁设计过程中必不可少的计算内容。文中分别采用MIDAS,ANSYS有限元软件建立单箱三室混凝土箱梁节段模型,加载对比分析其横向受力特点,得出结论:无横隔板箱梁横向呈框架受力模式,二者计算结果基本是吻合的,同时说明了MIDAS平面杆系模型可以满足一般计算精度要求。
Because of its box-shaped cross-section box has good structural properties, such as cross-section torsional stiffness, can effectively resist the positive and negative bending moment, construction convenience, cross-section use efficiency, which has been widely used in a variety of modern bridges. Therefore, the box girder various stress characteristics should have a clear understanding of which horizontal internal force is also an essential calculation of concrete box girder design. In this paper, the finite element software MIDAS and ANSYS were used to establish the single-box three-compartment concrete box girder section model, and the transverse load characteristics were compared and analyzed. The conclusion was drawn that: Basically coincides with the description of the MIDAS plane rod model can meet the general calculation accuracy requirements.