市政大跨径简支钢混组合梁桥总体设计
Overall Design of Municipal Long-span Simple-supported Steel-concrete Composite Beam Bridge
杨荣荣1
作者信息
- 1. 上海市政工程设计研究总院(集团)有限公司,上海市 200092
- 折叠
摘要
针对城市高架桥梁跨越横向道路常用的简支60 m大跨径槽型钢混组合梁桥,对横断面梁片数布置、不同施工方案、降低桥面板收缩徐变措施进行分析.结果表明:(1)少主梁设计相较于多主梁设计经济性更好,但跨中上翼缘板厚会增加较多.(2)设置2个临时支墩,基本可实现钢筋混凝土共同承担一期恒载的效果.(3)与少支架施工相比,整体吊装虽方便施工,但大大提高了钢材的用钢量.(4)无支架施工时,预制桥面板在90 d的存放龄期下,频遇组合可降低混凝土桥面板30％的轴向拉力.
Abstract
Aiming at the simple-supported 60 m long-span steel-concrete composite beam bridge commonly used for the urban viaduct spanning road,the layout of cross-section beam number,the different construction schemes,and the measures to reduce the shrinkage and creep of deck slab are analyzed.The result shows that the economy of few-girder design is better than that of the multi-girder design.But the thickness of top flange slab in the middle of span will increase much.2 temporary branch piers are set up,which can basically realize the effect of steel and concrete jointly bearing the first phase of dead load.Compared with the few-support construction,the integral hoisting is easy for construction,but will greatly increase the amount of steel material.The frequent combination can reduce the 30％axial tensile force of prefabricated concrete deck slab at the storing age for 90 d in the construction without support.
关键词
钢混组合梁/MIDAS/横断面布置/施工工序Key words
steel-concrete composite beam/MIDAS/cross-section layout/construction procedure引用本文复制引用
出版年
2024
NETL
NSTL
万方数据