钢管混凝土组合桥塔拉索锚固区受力分析  

Stress Analysis of the Anchorage Zone of the Concrete-filled Steel Tube Composite Pylon

作　　者：王戈 田波 梁健 文凯 Wang Ge;Tian Bo;Liang Jian;Wen Kai(Sichuan Provincial Highway Planning,Survey,Design and Research Institute Co.,Ltd.,Chengdu 610000,China)

机构地区：[1]四川省公路规划勘察设计研究院有限公司,四川成都610000

出　　处：《市政技术》2024年第9期19-25,共7页Journal of Municipal Technology

基　　金：四川省交通运输科技项目(2020-A-04)。

摘　　要：利用钢管混凝土抗压承载力高的特点,提出了一种斜拉桥钢管混凝土组合桥塔结构。索塔锚固段采用锚固、传力相互独立的索塔锚固构造,最大限度地发挥了钢管混凝土的抗压性能和钢箱混凝土的抗弯性能。建立了索塔锚固段实体有限元模型,分析了索塔钢板、混凝土和PBL键的受力特性,并把索塔锚固区简化为平面框架模型,给出了塔壁抗弯、抗剪、偏心抗拉承载力估算方法。研究结果表明:索塔各部分受力良好。Because of advantage of the high compressive bearing capacity of concrete-filled steel tube,a steel tube concrete composite bridge tower structure of cable-stayed bridge was proposed.The anchorage section of the cable tower adopts a cable tower anchorage structure with independent anchorage and force transmission,which maximized the compressive performance of concrete-filled steel and the bending performance of steel box concrete.A solid finite element model was established to analyze the stress characteristics of the steel plate,concrete,and PBL connector.The anchorage zone of the cable tower was simplified into a planar frame model.The estimation methods for the bending,shear,and eccentric tensile bearing capacity of the tower wall were provided.The research results indicate that all parts of the cable tower stressed well.

关 键 词：斜拉桥 索塔 钢管混凝土 组合结构 索塔锚固 钢锚箱 受力分析 

分 类 号：U441.2[建筑科学—桥梁与隧道工程] U448.27[交通运输工程—道路与铁道工程]