套拱法在加固大跨径空腹式石拱桥中的应用  

Application of Cover Arch Method in Reinforcing Long-span Open-web Stone Arch Bridge

作　　者：李铁盔 LI Tiekui(Hubei Zhongguang Highway Survey and Design Co.,Ltd.,Yichang 443000,Hubei,China)

机构地区：[1]湖北中广公路勘察设计有限公司,湖北宜昌443000

出　　处：《工程技术研究》2024年第7期24-26,共3页Engineering and Technological Research

摘　　要：为研究大跨径空腹式石拱桥经套拱加固后的受力状态,文章以某大跨径空腹式石拱桥的套拱加固设计为依托,建立了整体有限元模型,采用双单元法模拟旧石拱圈及新加固钢筋混凝土拱圈。计算分析表明,套拱加固后,在汽车荷载及其他外荷载作用下,旧石拱圈内力和承载能力显著增强,因此该加固方案理论可行,可为今后类似工程设计提供参考。In order to study the stress state of long-span open-web stone arch bridge after arch reinforcement,based on the arch reinforcement design of a long-span open-web stone arch bridge,the whole finite element model was established,and the double element method was used to simulate the old stone arch ring and the new reinforced concrete arch ring.The calculation and analysis show that the internal force and bearing capacity of the old stone arch ring are significantly enhanced under the action of vehicle load and other external loads after the arch reinforcement.Therefore,the reinforcement scheme is theoretically feasible and can provide reference for similar engineering design in the future.

关 键 词：空腹式石拱桥 套拱法 加固设计 有限元模型 

分 类 号：U445.7[建筑科学—桥梁与隧道工程]