钢-STC组合桥面板静力及疲劳性能分析  

Static and Fatigue Performance Analysis of Steel-STC Combined Bridge Deck Slabs

作　　者：邓德伦 李新春 杨盼杰 DENG Delun;LI Xinchun;YANG Panjie(Guangzhou Municipal Engineering Design&Research Institute Co.,Ltd,Guangzhou,510060,Guangdong,China;Guangxi Transportation Design Group Co.,Ltd,Nanning 530022,Guangxi,China)

机构地区：[1]广州市市政工程设计研究总院有限公司,广东广州510060 [2]广西交通设计集团有限公司,广西南宁530022

出　　处：《广东交通职业技术学院学报》2024年第3期34-39,共6页Journal of Guangdong Communication Polytechnic

摘　　要：传统正交异性钢桥面板结构易疲劳开裂,掺入钢纤维的超高性能混凝土因其优异的韧性和抗拉强度,可提高桥面结构的刚度和耐久性,缓解疲劳开裂问题。然而,目前结合实际工程对考虑超高性能混凝土作为结构层受力与传统正交异性桥面板性能的差异的量化分析仍较欠缺。因此,以清远市北江某桥为背景建立节段箱梁精细化有限元模型,对纯钢桥面板和钢-STC组合桥面板的结构进行超高性能混凝土层参与受力对桥面结构静力及疲劳差异的量化分析。结果表明,铺设超高性能混凝土层后可显著提高主梁刚度,较大幅度降低箱梁顶板应力,基本消除钢桥面的疲劳开裂病害问题。Traditional orthotropic steel bridge deck structures are prone to fatigue cracking,and ultra-high-performance concrete incorporated with steel fibers can improve the stiffness and durability of the bridge deck structure and alleviate the fatigue cracking problem due to its excellent toughness and tensile strength.However,quantitative analysis of the differences in the performance of bridge decks considering ultra-high performance concrete as a structural layer and traditional orthotropic anisotropic bridge decks in conjunction with practical engineering is still lacking.Therefore,the refined finite element model of segmental box girder was established in the background of a bridge in Beijiang,Qingyuan,to quantitatively analyze the difference in static force and fatigue of the bridge deck structure with the participation of ultra-high-performance concrete layer in the force on the structure of the pure steel bridge deck and the structure of the steel-STC combination bridge deck.The results show that the laying of ultra-high performance concrete layer can significantly improve the stiffness of the main girder,reduce the top plate stress of the box girder,and basically eliminate the fatigue cracking problem of the steel bridge deck.

关 键 词：大跨斜拉桥 钢-STC组合桥面板 精细化有限元模型 静力分析 疲劳性能分析 

分 类 号：U488.27[交通运输工程—载运工具运用工程]