Abstract The connection of precast joints is an important factor that affects the seismic and endurance performance of precast concrete structures. Currently, the seismic performance of existing precast joints cannot satisfy the application requirements of complex and harsh environments. This paper proposes a cogging high-strength bolt composite joint (C-HSB joint), and introduces its main components and assembly methods. Two precast beam-column joint (B-C joint) specimens are designed and manufactured using C-HSB joints. The C-HSB joints are arranged outside (SJ2) and inside (SJ3) the plastic hinge area of the beam. For comparison, a B-C joint specimen using a traditional cogging joint (T-C joint) is also designed and manufactured. The T-C joint is arranged outside of the plastic hinge area of the beam (SJ1). Then, quasi-static tests of these three specimens are performed. The seismic performance of the C-HSB and T-C joints are systematically analysed through the following parameters: damage phenomenon, bearing capacity, displacement ductility, rigidity deterioration, energy dissipation, operating state of the cogging seam, and bond-anchorage performance of rebar. Moreover, the influence of the arrangement location and HSB settlement of the C-HSB joint is discussed in detail. The results show that cogging can limit the development of seam cracks and improve the shear capacity of the joint. The HSB can delay the seam cracking, improve the bond-anchorage performance of rebar, and increase the crack resistance and self-resetting capacity of joints. The C-HSB joint can delay the development of seam cracks. The longitudinal rebar of the specimen can utilise more effectively using a C-HSB joint. The location of the C-HSB joint significantly affects the failure mode of the specimen. The internal arrangement (inside the plastic hinge area) of the C-HSB joint will induce the upward motion of the beam plastic hinge and exacerbate the core area damage. The external arrangement (outside the plastic hinge area) will increase the bearing capacity and energy dissipation of the specimens, and the rigidity deterioration will also be slowed. Compared with the C-HSB joint, the T-C joint has a lower displacement ductility, lower energy dissipation, and more rapid rigidity deterioration. The seismic performance of the T-C joint is significantly inferior. The C-HSB joint can be applied to precast concrete structures under complex and harsh environments. The external arrangement (close to the upper boundary of the plastic hinge area) of the C-HSB joint is a better choice.

中文翻译：

---

预制齿槽高强螺栓复合节点抗震性能及布置位置影响试验研究

摘要 预制节点的连接是影响预制混凝土结构抗震和耐久性能的重要因素。目前，现有预制节点的抗震性能不能满足复杂恶劣环境的应用要求。本文提出了一种齿槽高强度螺栓复合接头（C-HSB接头），并介绍了其主要部件和装配方法。使用 C-HSB 接头设计和制造了两个预制梁柱接头（BC 接头）试样。C-HSB 节点布置在梁塑性铰区的外侧（SJ2）和内侧（SJ3）。为了进行比较，还设计和制造了使用传统齿槽接头（TC 接头）的 BC 接头试样。TC 接头布置在梁（SJ1）的塑性铰区之外。然后，对这三个试样进行了准静态试验。通过损伤现象、承载力、位移延性、刚度劣化、能量耗散、齿槽缝运行状态、钢筋粘结锚固性能等参数，系统地分析了C-HSB和TC接头的抗震性能。此外，详细讨论了C-HSB接头布置位置和HSB沉降的影响。结果表明，齿槽效应可以限制接缝裂纹的发展并提高接头的抗剪能力。HSB可以延缓缝开裂，提高钢筋的粘结锚固性能，增加接头的抗裂性和自复位能力。C-HSB 接头可以延迟接缝裂纹的发展。使用 C-HSB 接头可以更有效地利用试样的纵向钢筋。C-HSB 接头的位置显着影响试件的失效模式。C-HSB接头的内部布置（塑性铰区内部）会引起梁塑性铰向上运动，加剧核心区损伤。外部布置（塑性铰区外）会增加试件的承载能力和耗能，刚度劣化也会减缓。与C-HSB接头相比，TC接头位移延展性较低，耗能较低，刚度退化较快。TC接头的抗震性能明显较差。C-HSB接头可应用于复杂恶劣环境下的预制混凝土结构。