空间多肢弯斜钢拱桥设计

Design of Spatial Multi-limb Skew Steel Arch Bridge

为满足人民群众更高品质的生活需求,作为城市中最重要的公共建筑形式之一,城市桥梁需要更好的呈现建筑美和技术美,从而对桥梁结构设计也提出了更高的要求。青海西宁北川河片区滨河西路桥为更好表现建筑结构形态,并适应道路平面线形和与河道斜交的桥位条件,桥梁结构呈现"空间、多肢、弯斜"的显著特点,属于复杂景观钢拱桥,因此在设计方法上明显有别于常规拱桥。结合桥梁全过程的BIM正向设计,对结构体系、空间拱轴线、多边形变截面多肢拱肋、吊杆及连杆、弯斜钢箱梁等关键设计内容进行了论述和探讨,以期为类似城市景观桥梁设计提供参考。

In order to satisfy the needs of the people for a higher quality of life,as one of the most important public buildings in a city,the urban bridge is required to show the better architecture beauty and technical beauty,thereby the higher requirements are also put forward for the design of bridge structures.In order to better express the architectural structure form and adapt the road plane alignment and oblique bridge location with the river,the structure of West Binhe Road Bridge in Beichuan River Area of Xining in Qinghai presents the remarkable characteristics of "space,multi-limb and oblique",which belongs to a complex landscape steel arch bridge.Therefore,its design method is obviously different from the design of the conventional arch bridge.Combined with the BIM forward design of the whole process of the bridge,the key design contents of structural system,spatial arch axis,polygon variable cross-section multi-limb arch rib,suspender and link rod and,oblique steel box beam are discussed in order to provide the reference for the design of the similar urban landscape bridges.