This article investigated four concrete beam-column connections experimentally, including an interior precast specimen, an exterior precast specimen and two corresponding cast-in-place (CIP) specimens. Longitudinal rebars of precast columns were connected by embedded bolt connectors, while longitudinal rebars of precast beams were welded in CIP core areas. These full-scale beam-column connections with axial compression ratio 0.5 were tested under reversed cyclic loading to estimate seismic behavior. The results revealed that failure pattern of all specimens was flexural failure which occurred at beam ends near column face. No obvious damage took place in core areas and columns. The hysteresis curves of all specimens were relatively plump, showing relatively good energy dissipation capacity. The difference of bearing capacity between precast specimens and corresponding CIP specimens was not greater than 5%. Displacement ductility of the interior and exterior precast specimens was 3.17 and 2.70, which was about 5.4% lower and 3.4% higher than that of corresponding CIP specimens, respectively. A degenerated four-linear restoring force model was proposed for the precast beam-column connections with bolt connectors in columns.

中文翻译：

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柱内螺栓连接件预制混凝土梁柱连接的抗震性能

本文通过实验研究了四个混凝土梁柱连接，包括一个内部预制试样、一个外部预制试样和两个相应的现浇 (CIP) 试样。预制柱的纵向钢筋通过预制螺栓连接件连接，而预制梁的纵向钢筋在CIP核心区焊接。这些轴向压缩比为 0.5 的全尺寸梁柱连接在反向循环载荷下进行了测试，以估计地震行为。结果表明，所有试件的破坏模式均为弯曲破坏，发生在靠近柱面的梁端。核心区和柱子没有发生明显的损坏。所有试件的滞后曲线都比较丰满，表现出较好的能量耗散能力。预制试件与相应的CIP试件承载力差异不大于5%。内部和外部预制试样的位移延展性为 3.17 和 2.70，分别比相应的 CIP 试样低 5.4% 和 3.4%。针对柱内螺栓连接的预制梁柱连接，提出了退化四线恢复力模型。