合肥市广德路非对称钢拱桥结构设计

Structural Design of Hefei Guangde Road Asymmetrical Steel Arch Bridge

合肥市广德路大桥主桥为一座非对称三跨连续钢拱桥,跨径布置为50 m+135 m+45 m,总长230 m。从方案构思出发,依托桥梁景观需求,通过从传统钢结构拱桥对称结构体系的布置到非对称布置的转换过程,形成了结构即景观的方案。由于结构的非对称性,本桥与其他桥梁相比具有特殊的设计。首先对主要结构构件的特殊设计进行了说明;然后在抗震设计方面,首次采用了大悬臂横向摆动抗震体系,应用此抗震体系降低了风撑30%的地震作用应力;最后说明了BIM模型在本桥的应用特点。

The main bridge of Hefei Guangde Road Bridge is an asymmetric three-span continuous steel arch bridge with a span of 50 m+135 m+45 m and the total length is 230 m.Starting from the conception of the scheme,relying on the demand of the bridge landscape,through the transformation process from the symmetrical structure system of the traditional steel arch bridge to the asymmetrical layout,the scheme that the structure is the landscape is formed.Because of the asymmetry of the structure,this bridge has a special design compared with other bridges.Firstly,the special design of the main structural components is explained.Then,in the aspect of seismic design,the large cantilever lateral swing seismic system is adopted for the first time,which reduces the seismic stress of wind bracing by 30%.Finally,the application characteristics of BIM model in this bridge are explained.