GFRP-钢组合梁桥的荷载试验  

Experiment of Load Test of GFRP-Steel Composite Girder Bridge

作　　者：朱坤宁[1] 万水[1] 

机构地区：[1]东南大学交通学院,江苏南京210096

出　　处：《公路交通科技》2011年第11期48-54,共7页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(50878048;50978055);国家高技术研究发展计划(八六三)项目(2006AA11Z103);河北省交通厅科技重点项目(Y-060136)

摘　　要：对国内首座GFRP-钢组合梁桥进行荷载试验,并将荷载试验的实测结果与理论计算结果进行了分析比较。对GFRP桥面板的局部变形进行测量,并与有限元计算值进行对比,分析了在车轮荷载作用下桥面板结构的变形情况与沥青混凝土铺装层的应变状态。结果表明各主梁变形实测值和理论值接近,由车轮荷载引起的铺装层表面拉应力小于沥青混凝土的抗拉极限强度,结构处于安全受力状态。分析结果可为GFRP-钢组合梁桥的设计和应用提供参考依据。The load test on the first GFRP-steel composite girder bridge in China was implemented,the test result was compared with theoretical values.The local deformation of GFRP bridge deck was also measured,and the values were compared with the finite element calculations,then the deformation of bridge deck and the strain of asphalt concrete pavement under wheel loads were studied.The results show that the measured deformation of steel beams is close to the theoretical value,the tensile stress in the deck pavement caused by wheel load is less than the ultimate tensile strength of the asphalt concrete pavement,and the structure is in safe state.The analytical results could provide a reference for design and application of GFRP-steel composite girder bridges.

关 键 词：桥梁工程 组合结构 荷载试验 GFRP桥面板 有限元 

分 类 号：U448.381.2[建筑科学—桥梁与隧道工程]