The prefabricated residential buildings have become one of the most dominating construction methods in the modern construction industry. The seismic behavior of prefabricated components is crucial in the limit state design of the precast structure. This paper investigates the seismic behavior of a new type precast concrete column that has clustered steel reinforcement with grouting connection. Quasi-static tests are carried out on three cast-in-situ columns and seven precast columns. Axial compression ratio, lap length and lap space are the main variables considered. The failure process, hysteresis curve, skeleton curve, stiffness degradation, displacement ductility and energy dissipation are elaborated. The experimental results show that the precast columns with cluster reinforcement have similar seismic behavior to the cast-in-situ columns. Reducing the axial pressure can improve the ductility and energy consumption performance of the cluster-reinforced columns and exert its ductility to improve its seismic performance. During the assembly, a moderate increase in lap length can improve the seismic behavior of precast columns, whereas the lap space has an insignificant effect on the seismic behavior which indicates that the lap space is not an important factor during construction. The research outcome can serve as a reference for further development and application of precast structures.

中文翻译：

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灌浆-锚杆连接簇增强预制混凝土柱抗震性能试验研究

装配式住宅已成为现代建筑业中最主要的建筑方式之一。预制构件的抗震性能在预制结构的极限状态设计中至关重要。本文研究了一种新型预制混凝土柱的抗震性能，该柱采用注浆连接成簇钢筋。对三根现浇柱和七根预制柱进行准静态试验。轴向压缩比、搭接长度和搭接空间是考虑的主要变量。详细阐述了失效过程、滞后曲线、骨架曲线、刚度退化、位移延性和能量耗散。试验结果表明，簇配筋预制柱与现浇柱具有相似的抗震性能。降低轴压可以提高集束加强柱的延性和能耗性能，发挥延性提高抗震性能。在装配过程中，搭接长度的适度增加可以改善预制柱的抗震性能，而搭接空间对抗震性能的影响不显着，这表明搭接空间不是施工过程中的重要因素。研究成果可为预制结构的进一步开发和应用提供参考。而搭接空间对抗震性能的影响微乎其微，这表明搭接空间不是施工期间的重要因素。研究成果可为预制结构的进一步开发和应用提供参考。而搭接空间对抗震性能的影响微乎其微，这表明搭接空间不是施工期间的重要因素。研究成果可为预制结构的进一步开发和应用提供参考。