多跨钢筋混凝土连续拱桥设计  

Design of Multi-span Reinforced Concrete Continuous Arch Bridge

作　　者：闫康健 YAN Kangjian

机构地区：[1]同济大学建筑设计研究院(集团)有限公司,上海市200092

出　　处：《城市道桥与防洪》2024年第9期91-93,M0010,M0011,共5页Urban Roads Bridges & Flood Control

摘　　要：多跨钢筋混凝土连续拱桥以其造型优美的特点,在城市景观桥梁中得到了越来越多的应用。以苏州市吴江区一座22孔钢筋混凝土连拱桥为工程背景,分析其结构建模要点、受力特点及设计思路,同时对该桥施工过程中设置止推墩前后工况进行对比分析。结果表明,不平衡推力是影响连续拱桥设计施工的关键因素,通过在施工期间合理设置止推墩,可明显改善施工过程中主拱结构的受力和位移,成桥后全桥的不平衡推力主要由桥台承担,为同类型的钢筋混凝土连续拱桥工程提供了有益的参考。The multi-span reinforced concrete continuous arch bridge is increasingly used in the urban landscape bridges because of its graceful shape.Taking a 22-span reinforced concrete continuous arch bridge in Wujiang District,Suzhou City as the engineering background,its structural modeling essentials,loading features and design thinking are analyzed.At the same time,a comparative analysis is conducted on the working conditions before and after the installation of thrust piers during the construction process of the bridge.The results show that unbalanced thrust is a key factor affecting the design and construction of continuous arch bridge.The thrust piers reasonably installed during the construction can significantly improve the stress and displacement of the main arch structure.The unbalanced thrust of the whole bridge after being completed is mainly born by the abutment,which provides the beneficial reference for the similar reinforced concrete continuous bridge projects.

关 键 词：上承式拱桥 连拱桥 止推墩 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]