某三跨连续钢箱系杆拱桥设计分析  

Design And Analysis of a Three-span Continuous Steel Box Girder Arch Bridge

作　　者：饶浩淼 杨林 RAO Haomiao;YANG Lin

机构地区：[1]广州市城市规划勘测设计研究院有限公司,广东广州510610 [2]中水珠江规划勘测设计有限公司,广东广州510060

出　　处：《城市道桥与防洪》2024年第11期108-112,M0012,共6页Urban Roads Bridges & Flood Control

摘　　要：某特大型跨铁路市政桥为(121+125+121)m三跨连续单拱肋钢箱系杆拱桥,主拱矢高36 m,矢跨比1/3.47,边跨矢高20 m矢跨比为1/6.05,拱轴线采用正弦函数,拱肋创新地采用了变高变宽的空间扭曲设计,桥梁整体景观效果佳。标准桥面宽度38 m,双向8车道,在大里程侧衔接南北侧快速路立交匝道,主梁加宽至55.8 m。在同类型桥梁中,桥梁施工精度要求相对高,难度大。详细介绍桥梁整体及局部设计及计算情况,证明了扭曲的拱肋腹板结构可以有效传递结构内力,能保证结构受力安全,以期为今后类似工程提供有益的设计思路和借鉴经验。A large-scale cross-rail municipal bridge is a continuous single-arch rib steel box girder arch bridge with three spans of(121+125+121)m.The main arch is 36 m high,with a span-to-span ratio of 1/3.47,and the side span is 20 m high,with a span-to-span ratio of 1/6.05.The arch axis adopts the sine function,and the arch rib is innovatively designed with a higher and wider space twist,which has a good overall landscape effect of the bridge.The standard bridge deck is 38 m wide,with 8 bi-directional lanes.At the large mileage side,the north and south sides of the expressway are connected,and the main beam is widened to 55.8 m.In the same type of bridges,the construction accuracy of the bridge is relatively high and difficult.The overall and local design and calculation of the bridge are introduced in detail,which indicates that the twisted arch rib web structure can effectively transfer the internal force of the structure and ensure the safety of the structure,in order to provide useful design ideas and reference experience for similar projects in the future.

关 键 词：系杆拱 正弦函数 连续梁拱桥 扭曲结构 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]