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对高强混凝土组合梁桥梁中的钢和混凝土的连接件的静力和瞬时性能进行研究。在一系列条件下完成了拔出(Push-out)试验,并且依靠3D-F模型进行了分析。试验结果显示,平均最终剪切应力约为5·5MPa,而且结构响应主要依靠二维应力状态下的混凝土的行为。此外,粘合的连接件显示出很高的刚度和几乎与机械连接件一样的强度。对梁的模拟也表明,粘合的连接可以像梁一样被很精确地模拟。在混凝土桥面上开裂的风险也被显著减小,与那些采用机械连接相比的结构而言,这可能会增加粘合的钢-混凝土组合结构的耐久性。
The static and transient properties of steel-concrete connectors in high-strength concrete composite beam bridges were studied. Push-out tests were performed under a series of conditions and were analyzed using the 3D-F model. The experimental results show that the average final shear stress is about 5.5 MPa, and the structural response mainly depends on the behavior of concrete in two-dimensional stress state. In addition, the bonded connectors exhibit high stiffness and almost the same strength as mechanical connectors. The simulation of the beam also shows that the bonded connection can be simulated very accurately like a beam. The risk of cracking on the concrete deck is also significantly reduced, which may increase the durability of the bonded steel-concrete composite structure compared to those using mechanical connections.