中文摘要：

为解决由自攻螺钉机械连接的玻璃纤维增强塑料（GFRP）复合桥面板在仅承受18个月通行车辆荷载后即出现的承载能力削弱及失效问题，以试验结果和数值计算结果共同分析并对比了拟采用的铆钉和原有自攻螺钉所加固桥面板的结构性能差异。实验室试验中包括承受准静荷载作用的2个全比例尺寸试件，以分别研究桥面板在不同连接件加固情况下的弯曲特性。最后采用有限元模型判断理想刚性机械连接下桥面板的受力状态。研究结果表明：铆钉所加固桥面板的力学性能曲线呈现线性关系并与有限元分析结果吻合，自攻螺钉所加固桥面板的力学性能曲线均呈非线性关系并与有限元分析结果和铆钉试验结果均有较大差别，在加载范围内紧固件均具有充足的弹性变形空间，机械连接孔洞处的应力集中导致的材料强度破坏是桥面板整体性能下降或破坏的主要原因，2种连接均使复合桥面板无法满足平截面假定，这表明在实际工程应用中铆钉相比自攻螺钉是更加合理的选择，表现出更接近理想刚性连接的性能，桥面板材料的强度及其与紧固件形式的配合情况是在规范荷载范围内比试验中的连接件更影响桥面板整体受力性能的关键因素，更有效的连接技术有待被开发。

英文摘要：

To overcome the problems of weaken bearing capacity and failures of a glass fiber rein- forced polymer （GFRP） composite bridge deck panel system which had been mechanically con- nected with self-tapping screws and undergone only eighteen-month passing vehicle loadings, ex- perimental and numerical studies were undertaken to compare the structural performance of the decks with proposed new rivets and the original ones. The test program consisted of two full- scale tests was conducted under quasi-static loading to experimentally investigate the flexural be- havior of the decks with the two connectors respectively. Finite element modeling of the flexural specimens was also carried out to determine the state of the bridge deck with the mechanical con- nection, which was ideal rigid link. The results show that the mechanical behavior curve of the rivet test maintains linear relationship and agrees well with the numerical result, whereas the be- havior curves of the self-tapping screw test are nonlinear and inconsistent with those of both the rivet test and numerical result. It can also be determined that the connectors are all qualified with abundant elasticity to subject to external loads, and it is the stress concentration at the hole areas of mechanical connectors that is the main reason for the strength failure of the GFRP material and the slippage of the connectors, but those two connectors do not obey the plane assumption. These indicate that the rivet is a more favorable choice than the self-tapping screw, and performs almost as great as ideal rigid link of the finite element modeling. More effective connection tech- nology is anticipated, and the deck material strength and its compatibility with the fasteners are more significant factors to the overall structural performance of the bridge decks than the connec- tors in the loading range.