The behavior of perfobond rib shear connectors (PBL shear connectors) under monotonic loading has been widely studied. However, the performance of these connectors under cyclic loading is poorly understood and has seldom been investigated. This work presents an experimental study focusing on the cyclic performance of representative PBL shear connectors with passing rebar. Optical fibers were introduced to measure the detailed strain distributions. Results showed that the bearing capacity of these connectors could reduce up to 55.04% when compared with that under monotonic loading. The performance of these connectors differed significantly between the pull and push directions in the cyclic loading process. The concrete cracks, relative slip, and strains were developed earlier and more completely under pull than under push. Furthermore, rapid stiffness degradation, severe cracking and deformation of the concrete dowels were revealed, indicating the rapid failure of the adhesive effect, reduction of both the shear-friction effect and the dowel action of the passing rebars. These factors all contributed to the observed significant cyclic deterioration of the peak load and the slip. Based on this, a modified formula was proposed to consider the reduction effect. Comparisons between the analytical solution and test results validated the formula.

中文翻译：

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perfobond 肋剪力连接件循环性能试验研究

perfobond 肋剪力连接器（PBL 剪力连接器）在单调载荷下的行为已被广泛研究。然而，这些连接器在循环负载下的性能知之甚少，也很少被研究。这项工作提出了一项实验研究，重点是具有通过钢筋的代表性 PBL 剪力连接件的循环性能。引入光纤来测量详细的应变分布。结果表明，与单调加载相比，这些连接器的承载能力最多可降低55.04%。这些连接器的性能在循环加载过程中的拉和推方向之间存在显着差异。混凝土裂缝、相对滑移和应变在拉力下比在推力下更早、更完全。此外，显示出混凝土销钉的刚度迅速退化、严重开裂和变形，表明粘合效应迅速失效，剪切摩擦效应和通过钢筋的销钉作用均降低。这些因素都导致了观察到的峰值负载和滑差的显着循环恶化。在此基础上，提出了一个修正公式来考虑减少效果。解析解与测试结果之间的比较验证了该公式。在此基础上，提出了一个修正公式来考虑减少效果。解析解与测试结果之间的比较验证了该公式。在此基础上，提出了一个修正公式来考虑减少效果。解析解与测试结果之间的比较验证了该公式。