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首页> 外文期刊>International journal of steel structures >Analysis of Shear Connector of Steel-Concrete Composite Box-Girder Bridge Considering Interfacial Bonding and Friction
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Analysis of Shear Connector of Steel-Concrete Composite Box-Girder Bridge Considering Interfacial Bonding and Friction

机译：考虑界面粘接与摩擦的钢混凝土复合箱梁桥剪切连接器分析

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摘要

Steel-concrete composite bridges consist of steel and concrete parts which are connected by shear connector such as the widely-used headed stud. Through the chemistry bonding, interface friction and mechanical action the two different materials parts are combined as a composite structure system. Because of the structural mechanism, longitudinal and lateral relative slip and normal separation between the concrete deck and steel girder flange will inevitably exist during the loading process. Further, the complex interface mechanical behavior causes difficulties with nonlinear numerical analysis. Multiple broken lines mode cohesive zone model considering bonding and friction is used in this paper to describe the tangent slip and normal crack of the interface. A zero thickness cohesive element was implemented via the user-defined element subroutine UEL in ABAQUS. Using this method, numerical simulation analysis of a two span composite continuous box-girder was carried out. Results showed load-displacement curves of the structure, relative displacement between the steel girder and the concrete slab interface, interface stress distribution, and internal force of shear studs. Discontinuous deformation numerical simulation has been realized, and effectiveness of the proposed method and accuracy of the program were verified. Although shear stress was assumed to be transmitted by shear connector in the design stage, interface bonding and friction resistance can affect the force state of the shear connector. Results of this study can be used for detailed analysis and evaluation of the composite box-girder bridge without the need to rely on the constitutive laws of shear connectors obtained from push-out tests.
机译：钢混凝土复合桥组成的钢和混凝土零件由剪切连接器连接，如广泛使用的头螺柱。通过化学粘接，界面摩擦和机械作用两种不同的材料部件作为复合结构系统组合。由于结构机制，在装载过程中，混凝土甲板和钢梁梁之间的纵向和横向相对滑动和正常分离将不可避免地存在。此外，复杂的接口机械行为导致非线性数值分析的困难。本文使用了考虑粘接和摩擦的多个断线模式粘性区域模型，描述了界面的切线滑动和正常裂缝。通过ABAQU中的用户定义元素子程序UEL实现零厚度粘性元件。使用该方法，进行了两个跨度复合连续箱梁的数值模拟分析。结果表明，钢梁和混凝土板界面之间的结构，相对位移，剪切螺柱的内部力，相对位移的载荷 - 位移曲线。已经实现了不连续变形数值模拟，验证了所提出的方法和准确性的有效性。尽管假设剪切应力由设计阶段中的剪切连接器传输，但是接口键合和摩擦阻力可以影响剪切连接器的力状态。该研究的结果可用于对复合箱梁桥的详细分析和评估，而无需依赖于从推出测试获得的剪切连接器的组成型定律。

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