空间异形索塔组合梁斜拉桥张拉顺序优化研究

On optimal study for tensioning sequence on cable-stayed bridge’s composite beam for spatial special-shaped cable tower

空间异形索塔钢混组合梁斜拉桥,相较一般对称混凝土斜拉桥,拉索索力对主梁和主塔的内力状态和变形影响更为显著。针对某异形索塔组合梁斜拉桥,提出了三种不同的张拉方案,分析了三种张拉方案下桥梁结构的受力和变形情况,从而选取一种最优的张拉方案,该优化方案的实际施工控制相关测试数据,验证了其合理性。

The paper indicates that as for the spatial cable-stayed and steel-concrete composite beam,its cable forces have more obvious influence on the internal force and deformation of the main beam and main tower with the comparison with the common symmetrical concrete cable-stayed bridges,points out three tensioning schemes according to some cable-stayed bridge's composite beam for special-shaped cable tower,analyzes the stresses and deformations of the bridge structures of the three schemes to select the optimal tensioning scheme,and proves its reasonable features through the related tested data of the construction control in the optimal scheme.