节点连接刚度对钢桁梁拱桥受力性能影响分析

摘要

以某钢桁梁拱桥为研究背景,建立不同节点连接刚度下全桥有限元模型,研究了节点刚接与铰接两种形式对桥梁受力性能的影响,通过计算桥梁在施工过程中的三种工况：边跨施工完成、中跨施工完成、成桥后,得到了桥梁在自重作用下的变形和应力变化情况,对比了节点刚接与铰接情况下桥梁的受力性能。%Taking a steel truss girders arch bridge as the research background,establish the finite element model of the whole bridge under the different joint stiffness of nodes,research the influence of mechanical properties of bridges on two connection forms of nodes which is between rigid connection and hinged.Through calculating bridge in the construction process of three conditions： the side cross completion in construction,across completion in construction,bridge built,obtained the action of deformation and stress changes of bridges in self-respect case,compared the stress performance of bridge under the case of rigid connection nodes and hinged nodes.