Abstract In this research effort, the generalized warping and distortional problem of straight or horizontally curved composite beams of arbitrary cross section, loading and boundary conditions is presented. An inclined plane of curvature is also considered (with respect to the horizontal plane) in order to account for a slope in the cross-section plane. Additionally, a finite stiffness of diaphragmatic plates has been introduced in the formulation in order to compare with the beam models where rigid diaphragms are considered, as usually is assumed in practice. The numerical method employed for the 1D beam formulation is based on Isogeometric tools (NURBS) while the 3D shell or solid models are developed in Finite Element commercial software for composite cross sections with diaphragms. The influence of friction on the contact interaction between the concrete and steel parts is also considered. The number of intermediate diaphragms is determined according to commonly used bridge design guidelines and the results are compared to the developed arrangements in order to assess the overall structural behavior of bridge decks. Straight or curved beam models with open or closed composite cross sections of full (1D proposed beam) or partial material-bonding (3D solid/shell models) and various arrangements of intermediate diaphragms and materials have been studied.

中文翻译：

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具有中间横隔板的复合桥的分析和设计指南的评估

摘要 在这项研究工作中，提出了任意截面、荷载和边界条件的直线或水平弯曲组合梁的广义翘曲和变形问题。还考虑了倾斜的曲率平面（相对于水平面），以解决横截面中的斜率。此外，在公式中引入了隔膜板的有限刚度，以便与考虑刚性隔膜的梁模型进行比较，这在实践中通常是假设的。用于 1D 梁公式的数值方法基于等几何工具 (NURBS)，而 3D 壳或实体模型是在有限元商业软件中开发的，用于带隔膜的复合横截面。还考虑了摩擦对混凝土和钢部件之间接触相互作用的影响。根据常用的桥梁设计指南确定中间隔板的数量，并将结果与​​开发的布置进行比较，以评估桥面板的整体结构性能。已经研究了具有完整（1D 建议梁）或部分材料结合（3D 实体/壳模型）的开放或闭合复合横截面的直梁或弯曲梁模型以及中间隔膜和材料的各种布置。