基于欧洲规范的组合梁叠合桥面板横向受力分析  

Transverse Mechanical Property of Composite Deck System Consisting of Steel Trusses and Precast Concrete Slabs Together with a Cast-in-Situ Layer

作　　者：谭超 李文武 熊先勇 贺君[3] 张俊豪 TAN Chao;LI Wenwu;XIONG Xianyong;HE Jun;ZHANG Junhao(Hunan Provincial Communications Survey and Design Institute Co.,Ltd.,Changsha 410200,China;Hunan Road&Bridge Construction Group Co.,Ltd.,Changsha 410004,China;Changsha University of Science&Technology,Changsha 410114,China)

机构地区：[1]湖南省交通规划勘察设计院有限公司,湖南长沙410200 [2]湖南路桥建设集团有限责任公司,湖南长沙410004 [3]长沙理工大学,湖南长沙410114

出　　处：《世界桥梁》2023年第4期1-7,共7页World Bridges

基　　金：国家自然科学基金项目(51978081);湖南省自然科学基金项目(2022JJ10049);湖南省科技重大专项(2017SK1010)。

摘　　要：为研究钢筋桁架叠合桥面板的横向受力性能,以格鲁吉亚E60高速公路上某主跨60 m组合梁桥为背景,针对14.4~16.6 m桥宽(5 m宽梁间距和2.2~3.3 m悬臂长度)采用“70 mm厚钢筋桁架预制板+180 mm厚现浇层”叠合桥面板方案,基于欧洲规范,应用弹性分析方法和MIDAS Civil有限元分析软件分别对施工阶段以及使用阶段不同桥宽桥面板横向受力进行分析。结果表明:除16.6 m宽桥面板外支点截面需要在原设计基础上加强配筋外,14.4 m和15.2 m宽桥面板的受力均满足欧洲规范要求;“70 mm厚钢筋桁架预制板+180 mm厚现浇层”叠合桥面板方案适用于5 m宽梁间距和2.2~3.3 m悬臂长度的桥面板,可满足实际桥梁结构受力需求。The transverse mechanical property of bridge deck system consisting of trusses made of reinforced bars,precast concrete slabs and a cast-in-situ layer is studied.A composite girder bridge with main spans of 60 m of E60 Highway in Georgia is used as a case.To accommodate a deck width of 14.4 to 16.6 m(the steel I girders are transversely spaced at 5 m and the cantilevers flanked the steel I girders are 2.2 to 3.3 m long),a solution of 70 mm-deep steel trusses and precast concrete slabs together with 180 mm-thick cast-in-situ layer is proposed.Based on Eurocode,an elastic analysis supplemented with finite element analysis in MIDAS Civil was conducted to analyze the transverse mechanical property of the deck system of different widths at the construction and service stages,respectively.As per the analysis,extra reinforcement is needed for the two outermost cross-sections in the 16.6 m-wide deck,and the load bearing capacities of the 14.4 m-and 15.2 m-wide decks meet the code requirements.The proposed deck system solution is applicable to the bridge where the steel girders are transversely spaced at 5 m and the cantilevers flanked the steel I girders are 2.2 to 3.3 m long and enables the bridge to achieve the expected load bearing requirements.

关 键 词：组合梁桥 钢筋桁架叠合桥面板 横向受力 欧洲规范 有限元法 

分 类 号：U448.216[建筑科学—桥梁与隧道工程] U443.31[交通运输工程—道路与铁道工程]