大跨度山区悬索桥钢桁加劲梁施工方案研究

Study on Construction Plan of Steel-truss Stiffening Girder for Large-span Mountainous Suspension Bridge

文章以坝陵河大桥为研究对象,建立了全桥施工过程空间非线性分析模型,并采用全刚结法及有铰逐次刚结法两种加劲梁施工方案进行了施工全过程的模拟仿真计算,研究了不同加劲梁方案下大桥结构受力状态及钢桁加劲梁安装阶段临时架设铰的作用,确定了合理的钢桁加劲梁施工方案。

With Baling River Bridge as the research object,the article established the spatial nonlinear analysis model of bridge construction process,and used two stiffening girder cor struction plans of rigid structure method and hinge successive rigid structure method to conduct the simulation calculations of the whole construction process, studied the bridge structure stress state under the different stiffening girder programs and the role of temporary hinge erection during steel-truss stiffening girder installation stage, and determined the reasonable steel-truss stiffening girder construction program.