Substituting normal concrete with engineered cementitious composites (ECC) is a promising way to address the cracking issue in steel-concrete composite structures. For realizing a synergetic deformation between ECC and steel, headed stud connectors can be incorporated to ensure an effective shear transfer along their interface. To understand the shear transfer mechanism of headed studs in ECC, a comprehensive experimental, numerical, and analytical approach is employed in this research. Firstly, a set of 13 push-out tests were carried out to explore the shear load-slip behavior of studs in ECC. Then, a parametric analysis was further conducted based on the finite element model to evaluate the influence of the diameter and length of stud, compressive strength of ECC, reinforcement ratio, and thickness of ECC layer. Finally, comprehensive analytical models for evaluating the shear carrying capacity, stiffness, and slipping ability of headed studs in ECC were established based on the elastic foundation beam model and regression analysis of experimental and numerical results.

中文翻译：

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工程水泥基复合材料 （ECC） 中有头螺柱连接器的剪切传递机制：实验观察、数值研究和分析模型


用工程水泥基复合材料 （ECC） 代替普通混凝土是解决钢-混凝土组合结构开裂问题的一种很有前途的方法。为了实现 ECC 和钢之间的协同变形，可以采用带头螺柱连接器，以确保沿其界面进行有效的剪切传递。为了了解 ECC 中带头螺柱的剪切传递机制，本研究采用了一种全面的实验、数值和分析方法。首先，进行了一组 13 次推出试验，以探究 ECC 中螺柱的剪切载荷滑移行为。然后，基于有限元模型进一步进行参数分析，评估螺柱直径和长度、ECC 抗压强度、配筋率和 ECC 层厚度的影响。最后，基于弹性基础梁模型和试验和数值结果的回归分析，建立了评价 ECC 中带头螺柱承载能力、刚度和滑移能力的综合分析模型。