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该文提出了采用平钢板剪力连接件连接的钢-RPC组合桥面板结构,该结构不仅能解决公路钢桥沥青铺装层的病害,还能有效地提高桥面横向刚度,有助于缓解U肋加劲处应力集中和疲劳开裂现象。为了掌握该组合结构界面抗剪性能,连接件板厚分别取10 mm和4 mm,进行了两组平钢板连接件的推出试验,试验考察了平钢板连接件厚度对抗剪破坏形态及承载力的影响。结果表明:平钢板厚度较小时,表现为平钢板连接件根部受拉屈服;厚度较大时表现为连接件附近混凝土被压碎,工作机理类似于型钢连接件。10 mm板厚连接件相比4 mm板厚抗剪承载力提高了43.6%,抗剪刚度提高了35%,同时延性略有下降,但两组试件的延性系数均大于3.5。最后给出了平钢板连接件的抗剪承载力简化计算公式,计算结果相比试验结果偏于安全,可供设计参考。
In this paper, a steel-RPC composite bridge deck structure connected by flat steel plate shear connectors is proposed, which can not only solve the disease of asphalt pavement of highway steel bridge, but also effectively improve the lateral stiffness of bridge deck, U-rib stiffener stress concentration and fatigue cracking phenomenon. In order to grasp the shear resistance of the composite structure interface, the thickness of the connecting piece is taken as 10 mm and 4 mm, respectively. The launching test of two sets of flat steel connecting pieces is carried out. The thickness of the flat steel connecting piece affects the shear failure mode and the bearing capacity Impact. The results show that when the thickness of the flat steel plate is small, the root of the flat steel plate is subjected to yielding. When the thickness is large, the concrete near the connecting piece is crushed, and the working mechanism is similar to that of the steel plate. Compared with 4 mm plate thickness, the shear resistance of 10 mm plate thickness joint increased by 43.6% and the shear stiffness increased by 35%, while the ductility decreased slightly, but the ductility coefficient of both specimens was greater than 3.5. Finally, the simplified formula for calculating the shear strength of flat steel plate connectors is given. The calculation results are safer than the test results and can be used as design reference.