二七长江大桥主跨斜拉桥钢主梁设计

Design of Steel Main Girder of Erqi Yangtze River Bridge

以二七长江大桥主桥为例,对其斜拉桥钢主梁设计进行了简要阐述,结合桥梁实际情况,从满足结构受力、方便施工制造及经济合理等方面,对主梁横截面形式、混合梁方案、钢-混结合段、中塔处塔-梁间约束固定等设计进行了比选研究。

Based on Erqi Yangtze River Bridge,the steel-girder design of cable-stayed bridge was elab-orated briefly,which included comparative study of the cross section form,mixed girder,steel-con-crete joint section,constraint between tower and beam,and also included innovative design of open section hybrid composite steel girder structure,U limit at the middle tower.The study can provide reference to design the same type bridge for its economy,reasonable structure and convenient con-struction.