不同截面形式钢-混组合梁桥面板横向受力性能分析  

Analysis of Transverse Mechanical Properties of Overlying Concrete Slabs over Steel Girders of Different Cross-Sections

作　　者：邓文琴 张汶金 刘朵 张建东[1,4] DENG Wenqin;ZHANG Wenjin;LIU Duo;ZHANG Jiandong(College of Civil Engineering,Nanjing Tech University,Nanjing 211816,China;Hefei Ruisheng Intelligent Technology Co.,Ltd.,Hefei 230051,China;Hefei Integrated Pipe Corridor Investment Operation Co.,Ltd.,Hefei 230051,China;Jiangsu Transportation Research Institute Co.,Ltd.,Nanjing 211112,China)

机构地区：[1]南京工业大学土木工程学院,江苏南京211816 [2]合肥睿昇智慧科技有限公司,安徽合肥230051 [3]合肥市综合管廊投资运营有限公司,安徽合肥230051 [4]苏交科集团股份有限公司,江苏南京211112

出　　处：《桥梁建设》2024年第5期116-123,共8页Bridge Construction

基　　金：国家自然科学基金项目(51908282);2020年度山东省交通运输科技计划项目(2020B47)。

摘　　要：为研究不同截面形式对钢-混组合梁桥面板横向弯曲效应的影响,以山东九龙东枢纽天桥为背景进行研究。采用有限元软件建立4种截面主梁(波形钢腹板工字梁、波形钢腹板箱梁、平钢板工字梁及混凝土箱梁)精细化模型,对比分析轮载作用数量、轮载横向作用位置对桥面板有效分布宽度的影响,同时对自重、轮载作用以及二者共同作用下的桥面板横向弯矩进行分析,并与《公路钢筋混凝土及预应力混凝土桥涵设计规范》(JTG 3362—2018,简称《桥规》)计算值进行对比。结果表明:双轮载作用下的桥面板有效分布宽度明显大于单轮载作用下的桥面板有效分布宽度,横向设计时应考虑轮载作用数量对桥面板安全设计的影响;钢-混组合梁桥面板有效分布宽度计算时,当轮载作用在横向跨中、支承附近处,采用《桥规》计算,当轮载作用在支承、悬臂板处,建议桥面板有效分布宽度修正系数分别取0.60、1.50;建议波形钢腹板工字梁、波形钢腹板箱梁、平钢板工字梁桥面板弯矩修正系数在轮载作用下分别取0.60、0.60、0.65,在自重、轮载共同作用下分别取0.55、0.55、0.60。In the steel-concrete composite girder bridge,different types of steel girders result in different transverse stress performances of the overlying concrete slabs.The Tianqiao Bridge of Jiulong East Junction in Shandong Province was used as a case.High-fidelity finite element models of four different types of steel-concrete composite girders were established,including the composite girders with steel I girders and corrugated steel webs,steel box girders with corrugated steel webs,steel I-section plate girders,and concrete box girders.The effects of numbers of loading wheels and locations of wheel loads on the effective breadth width of concrete slabs were compared.The transverse bending moments of the concrete slabs associated with self-weight of concrete,wheel loads and the synergy of the two were analyzed and compared with the calculations given in the Specifications for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and Culverts(JTG 3362-2018).The results show that the effective breadth width of concrete slabs under dual-wheel loads is notably bigger than that under single-wheel loads.In the transverse design,the influence of number of acting wheels on the safety of the bridge deck should be considered.To calculate the effective breadth width of concrete slabs of the steel-concrete composite girder,when the wheels act at midspan(along bridge width)and near the supports,the specification JTG 3362-2018 should be referenced,but when the wheels act at supports and cantilevers of the main girder,it is suggested to adopt the correction factors of 0.6 and 1.5,respectively.The suggested bending moment correction factors for the steel I girder with corrugated steel webs,steel box girder with corrugated steel webs and steel I-section plate girder are 0.60,0.60 and 0.65,respectively,and under the synergy of the self-weight and wheel loads,the values should be 0.55,0.55 and 0.60,respectively.

关 键 词：钢-混组合梁桥 截面形式 横向受力 有效分布宽度 弯矩 修正系数 有限元法 

分 类 号：U443.31[建筑科学—桥梁与隧道工程] U441[交通运输工程—道路与铁道工程]