摘要
为了解多主梁钢箱-叠合板组合梁桥的受力特性及其影响参数,以某60 m跨多主梁钢箱-叠合板简支组合梁桥右幅桥为背景,开展成桥试验及有限元分析。对该桥分别进行静载试验、环境振动试验、无障碍行车试验,结合有限元计算结果,分析主梁应变、挠度、模态及冲击系数等,并研究钢箱梁高度、混凝土板厚、横向联系梁高度对结构横向受力的影响。结果表明:多主梁钢箱-叠合板组合梁桥在设计荷载下结构均处于弹性状态,钢箱梁与叠合板可以实现协同工作,整体性能良好;钢箱梁高度越小、横向联系梁高度越大,结构整体性能越好,混凝土板厚对结构横向受力的影响较小。
The study focuses on the mechanical property of the bridge consisting of multiple steel box girders and composite deck slabs as well as influential parameters.The right deck of a simply-supported multi-girder bridge that has a length of 60 m is used as a case.Static load test,ambient vibration test,driving test were conducted,together with numerical simulation,to analyze the strain,deflection and vibration modes of main girder and impact factors.The influence of multiple parameters on the transverse load bearing behavior of the structure was studied,including the depth of steel box girders,thickness of concrete slabs and depth of cross beams.The results demonstrate that under design loads,the bridge is at elastic state,where the steel box girders and composite concrete slabs can work coordinatedly,and the integral mechanical property of the bridge is sound.Smaller depth of steel box girders and bigger depth of cross beams lead to better mechanical property of the bridge,while the influence of the concrete slab thickness on the transverse mechanical property of the bridge is minor.
作者
王雨伦
张泽军
庄亮东
薛志超
张文亮
WANG Yulun;ZHANG Zejun;ZHUANG Liangdong;XUE Zhichao;ZHANG Wenliang(Department of Civil Engineering,Tsinghua University,Beijing 100084,China;Innovation Research Institute,Shandong Hi-Speed Group Co.,Ltd.,Jinan 250101,China;Shandong Hi-Speed Infrastructure Construction Co.,Ltd.,Jinan 250014,China)
出处
《桥梁建设》
EI
CSCD
北大核心
2023年第5期90-96,共7页
Bridge Construction
基金
国家自然科学基金重大项目(51890903)。
关键词
组合梁桥
多主梁钢箱-叠合板组合梁
参数分析
受力性能
成桥试验
有限元法
composite girder bridge
bridge with multiple steel box girders and composite deck slabs
parametric analysis
mechanical property
load test after completion of bridge
finite element method
