Abstract Perfobond Leiste (PBL) shear connector is a widely-applied shear connector that rely on the concrete tenons and penetrating steel bars in the open hole steel ribs to resist slipping. Perfobond Hoop (PBH) shear connector uses the stirrups in the concrete structure to replace the independent penetrating straight reinforcement in the PBL shear connector, which has better spatial rigidness, and shear performance. In this paper, the static and fatigue tests of PBH shear connector are designed to analyze the static and fatigue failure characteristics and study the fatigue damage mechanism and fatigue damage evolution model of PBH shear connector. The study found that PBH shear connector has higher shear stiffness and fatigue properties than PBL shear connector. The concrete tenon in the open-hole steel rib plate is the key part of the PBH shear connector, and its failure form is different during static and fatigue failure. The fatigue shear stiffness of the PBH shear connector is shown as a jump reduction, which is different from the static shear stiffness as a smooth decline. The fatigue damage process of PBH shear connector is divided into three stages according to the failure mechanism: the bond failure stage of the steel-concrete composite interface, the crushing and migration stage of the concrete tenon, and the bending and failure stages of the penetrating steel bar. The three stages take up 10%, 80% and 10% of the fatigue life in turn. With the damage degree as the fatigue process variable, a two-line fatigue damage evolution model of the PBH shear connector is established, which can be used to predict the final interface slip value and fatigue life.

中文翻译：

---

钢-混凝土组合结构PBH剪力连接件的疲劳破坏

摘要 Perfobond Leiste（PBL）剪力连接件是一种应用广泛的剪力连接件，它依靠混凝土榫头和裸眼钢肋中的贯穿钢筋来抗滑。Perfobond Hoop（PBH）剪力连接件利用混凝土结构中的箍筋代替PBL剪力连接件中的独立贯穿直筋，具有更好的空间刚度和抗剪性能。本文设计了PBH剪力连接件静力和疲劳试验，分析了PBH剪力连接件的静力和疲劳破坏特性，研究了PBH剪力连接件的疲劳损伤机理和疲劳损伤演化模型。研究发现，PBH剪切连接器比PBL剪切连接器具有更高的剪切刚度和疲劳性能。开孔钢肋板中的混凝土榫是PBH剪力连接件的关键部位，其在静力和疲劳破坏时的破坏形式不同。PBH 剪切连接件的疲劳剪切刚度显示为跳跃减少，与静态剪切刚度不同，显示为平滑下降。PBH剪力连接件的疲劳破坏过程按破坏机理分为三个阶段：钢-混凝土组合界面的粘结破坏阶段、混凝土榫头的压碎和迁移阶段、贯穿件的弯曲破坏阶段。金属棒。三个阶段依次占疲劳寿命的10%、80%和10%。以损伤程度为疲劳过程变量，建立了PBH剪力连接件的两线疲劳损伤演化模型，