卢浦大桥系梁设计

Design of Bowstring Girder for Lupu Bridge

上海卢浦大桥为主跨550m的拱梁组合体系中承式系杆拱桥,系梁采用正交异性板全焊接钢箱梁结构。该文着重介绍计算各截面应力时,考虑剪力滞后效应。根据各截面受力特性,按英国规范BS5400计算出各截面的有效分布宽度,得出相应的各阶段应力。同时介绍了大立柱顶特殊节段的设计构造。

Shanghai Lupu Bridge is a half-through bowstring arch bridge with the main span of 550m. It is a bridge of girder-arch combined system. The structure of the bowstring girder is all-welded steel box girder with orthotropic slab. The article focuses introduction on the method of stress calculation considering shear lag effect. According to the Britain Standard of BS5400,the article calculates the effective distribution widths of the different sections and gives the corresponding stresses of the different stages on the stress characteristics of the different sections. The article also introduces the structure and design of the special segment combined with the big column.