摘要
某市快速路上跨京杭运河桥上部结构采用85 m+100 m+70 m+65 m不等跨变高钢结构连续梁,单箱双室布置;下部结构采用板式主墩,扶壁式桥台。在保证桥梁使用功能及节约资源的同时,兼顾了桥梁的景观和谐。针对全桥非对称的施工方法,分别计算了各个施工阶段及成桥阶段的截面有效宽度,所得到的截面强度满足规范要求。最后介绍了该不等跨结构的预拱度设置,以期为同类桥梁的设计提供借鉴。
The superstructure of the bridge spanning Beijing-Hangzhou Canal in an urban expressway is a(85 + 100 + 70 + 65)-m unequal-span variable-height steel structural continuous girder. The single-box double-cell layout is adopted. Its substructure is a plate-type main pier and a counterfort abutment. While ensuring the using function and saving resources of the bridge, the harmony of the bridge landscape is also considered. For the asymmetric construction method of the whole bridge, the effective widths of the sections at each construction stage and the bridge completion stage are calculated respectively. The achieved section strength meets the requirements of the code. Finally, the camber setting of this unequal-span structure is introduced in order to provide reference for the design of similar bridges.
出处
《城市道桥与防洪》
2020年第7期91-94,108,M0010,M0011,共7页
Urban Roads Bridges & Flood Control
关键词
老桥利用
钢箱梁
有效宽度
预拱度
utilization of existing bridges
steel box girder
effective width
camber
