箱梁桥断面优化设计分析

Section Optimization Design and Analysis of Box Girder Bridge

为了兼顾箱梁桥使用功能和经济性,论文总结了桥梁结构优化的基本概念、优化要素、优化内容等,从桥跨布置、腹板、底板、顶板厚度、横隔梁(板)等方面分析了箱梁桥断面的优化参数,探讨了箱梁桥的纵向预应力筋、竖向预应力筋、底板预应力筋配置原则和配置方法,以提高梁体的抗剪强度和抗拉能力。

In order to take into account the use function and economy of box girder bridge,this paper summarizes the basic concept,optimization elements and optimization contents of bridge structure optimization,then analyzes the optimization parameters of box girder bridge section from the aspects of bridge span layout,web,bottom plate,roof thickness,diaphragm(plate) and other detail dimensions,and discusses the longitudinal prestressed reinforcement,the allocation principles and methods of vertical prestressed reinforcement and bottom slab prestressed reinforcement are used to improve the shear strength and tensile capacity of the beam.