大跨度预应力门架墩分析设计

Analysis on the Design of Large-Span Prestressed Gantry Pier

文章以某高速公路项目大跨度预应力门架墩为研究对象,通过建立下部结构三维有限元分析模型,对桥墩盖梁在施工过程及桥梁使用阶段的受力进行分析,通过优化预应力盖梁构造尺寸、盖梁与立柱的连接形式,使得盖梁满足现行设计规范,为桥梁设计施工提供参考依据,并为同类工程提供参考。

In this paper,a large-span prestressed gantry pier of an expressway project is taken as the research object,and through the establishment of a three-dimensional finite element analysis model,the stress of the pier cap beam during the construction process and the use stage of the bridge is analyzed.By optimizing the structure size of the prestressed capping beam and the connection form between the capping beam and the vertical column,the capping beam can meet the current design standard,and provide a reference for the design and construction of the bridge as well as for similar projects.