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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 of the first GFRP-steel composite beam bridge in China is carried out, and the measured results of the load test are compared with the theoretical calculation results. The local deformation of the GFRP bridge deck was measured and compared with the calculated value of the finite element method. The deformation of the deck structure and the strain state of the asphalt concrete pavement were analyzed under the wheel load. The results show that the deformation of each main girder is close to the theoretical value. The tensile stress of pavement layer caused by wheel load is less than the ultimate tensile strength of asphalt concrete, and the structure is in safe stress state. The analysis results can provide reference for the design and application of GFRP-steel composite beam bridge.