体外预应力技术在连续钢箱梁桥中的应用  

Application of External Prestressing Technology in Continuous Steel Box Girder Bridge

作　　者：孟凡良 MENG Fanliang

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海市200092

出　　处：《城市道桥与防洪》2023年第3期117-119,M0012,共4页Urban Roads Bridges & Flood Control

摘　　要：以上海市某连续钢箱梁桥为依托,分析了体外预应力技术在连续刚箱梁桥中的作用,介绍了为确保锚固和传力构件强度和稳定所采用的钢锚箱和转换器构造;同时采用Midas/Civil建立有限元模型,分析了体外预应力技术在降低支点负弯矩区段钢箱梁上缘应力的作用。所得结论可为大跨径钢桥设计提供参考。Relying on a continuous steel box girder bridge in Shanghai,the effect of the external prestressing technology in the continuous steel box girder bridges is analyzed.In order to ensure the strength and stability of anchoring and force transferring components,the applied steel anchor box and transverter structures are introduced.At the same time,the finite element model is established by using Midas Civil to analyze the effect of external prestressing technology on reducing the stress on the upper edge of steel box girder at the negative bending moment zone of fulcrum.The achieved conclusion can provide the reference for the design of the long-span steel bridges.

关 键 词：体外预应力 钢结构 大跨径桥梁 有限元分析 连续钢箱梁 

分 类 号：U441[建筑科学—桥梁与隧道工程]