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介绍一种新型的上承式拉索组合拱桥。从立面上看,拱肋和桥面结构之间除了拱上立柱之外,另外还安装5对斜拉索,目的是通过调整拉索的索力来改变拱肋弯矩大小。采用RMV8i建立了200 m跨径的上承式拉索组合拱桥的有限元模型,计算在恒载和活载作用下的结构内力和截面应力,并与相同跨径的普通上承式钢管混凝土拱桥进行对比。结果表明,在恒载和活载作用下拱肋弯矩和拱顶轴力明显减小。
Introducing a new type of combined cable bridge. From the facade point of view, in addition to the arches between the arch rib and the bridge deck structure column, in addition to the installation of five pairs of stay cables, the purpose is to adjust the cable force by changing the cable arch bending moment size. The finite element model of 200 m long span cable-stayed arch bridge was established by using RMV8i to calculate the structural internal force and cross-section stress under constant load and live load, and compared with the common span CFST arch bridge comparing. The results show that the bending moment and the axial force of vault are obviously reduced under the action of dead load and live load.