综合法初定斜拉桥合理成桥状态

Reasonable State of Cable-stayed Bridge by Synthesis Method

以某顶推施工独塔斜拉桥钢箱梁为背景,在斜拉桥各种设计理论的基础上,提出了一种更适合于钢箱梁斜拉桥的索力优化方法。采用最小弯曲能量法初定成桥状态,力平衡法确定主梁的弯矩可行域,作为进一步约束优化的约束条件,从而得到斜拉桥各部件受力合理的成桥状态。

On the background of a steel girder of cable-stayed bridge of single pylon of Incremental Launching, based on the design theories of cable-stayed bridge, the paper put forward an optimization method for the cable of steel box girder. Firstly, bending energy method is used to determine the initial state, then the stress-balance method is used to determine the bending moment of the main beam, so the reasonable stress state of completed bridge is obtained.