既有大跨度拱桥病害评估及加固设计方案  

Disease Assessment and Reinforcement Design Scheme of Existing Long-span Arch Bridge

作　　者：韩雨 秦羚 Han Yu;Qin Ling(Central&Southern China Municipal Engineering Design and Research Institute Co.,Ltd.,Wuhan,China)

机构地区：[1]中国市政工程中南设计研究总院有限公司,湖北武汉

出　　处：《科学技术创新》2024年第20期149-152,共4页Scientific and Technological Innovation

摘　　要：针对某大跨度钢筋混凝土连续拱桥的病害状况,通过现场检查和荷载试验,识别出桥梁的主要病害类型,包括裂缝、混凝土腐蚀和结构变形,利用有限元模拟分析进一步确定了病害对桥梁结构性能的影响,基于病害评估结果,提出加固设计方案,通过采用碳纤维加固布和高性能混凝土覆盖层等措施,桥梁加固后的承载能力和耐久性得到提升,特别是在主拱圈与桥面交接区域的应力集中现象得到有效缓解,横向稳定性增强,延长了桥梁的使用寿命。Aiming at the disease condition of a long-span reinforced concrete continuous arch bridge,the main disease types of the bridge were identified through on-site inspection and load test,including cracks,concrete corrosion and structural deformation.The influence of the disease on the structural performance of the bridge was further determined by finite element simulation analysis.Based on the disease assessment results,a reinforcement design scheme was proposed.By using carbon fiber reinforced cloth and high-performance concrete covering layer,the bearing capacity and durability of the bridge after reinforcement were improved,especially in the main arch ring and the bridge deck.The stress concentration phenomenon is effectively alleviated and the lateral stability is enhanced.Extend the service life of the bridge.

关 键 词：拱桥病害 非破坏性检测 有限元模拟 结构加固 

分 类 号：U445.7[建筑科学—桥梁与隧道工程]