箱桁结合梁先箱后桁的桁梁合龙口变形适应性分析

Analysis of Adaptability to Deformation in Truss-Girder Closure of Box-Truss Composite Girder After Box Completion

斜拉桥在大跨度桥梁中占据重要位置,高速铁路大跨度斜拉桥梁体多采用钢桁梁、钢箱梁或钢箱钢桁结合梁,本文要探讨的是钢桁钢箱结合梁架设过程中先架设钢箱梁,在钢箱梁合龙的基础上利用已有平台架设钢桁梁时存在的问题及解决方法。运用ANSYS/Civil FEM程序计算钢桁梁拼装合龙口变形调整值,引领施工顺利实现大桥的合龙。

Cable-stayed bridges play an important role in long span bridges. Steel truss girder, steel box girder or steel box-truss composite girder are used for high speed railway cable-stayed bridges. The process with erection the steel box girder first of steel box-truss composite girder,the problem and solution of using existing platforms to erect steel truss girder on the basis of the closure of steel box girder were discussed in this paper. The ANSYS/Civil FEM program was used to calculate the deformation adjustment value of the closure of steel truss girder,which led the construction to achieve the closure of bridge successfully.