This contribution presents quasi-static tests of three modular prefabricated composite beam-column interior joints (MPCIJs), analyzing the strain distribution, ductility, energy consumption, strength, and stiffness degradation. Three finite element models were established by ABAQUS and compared with quasi-static test results to verify their correctness. The stress mechanism of different materials in MPCIJs was further analyzed. Results showed that the absolute value of the plastic drift ratio was 6.41-8.01% rad, the ductility coefficient was 3.50-4.50, and the equivalent viscous damping coefficient was 0.32-0.33. The overall degradation performance of MPCIJs strength and stiffness were relatively stable. MPCIJs achieved good seismic performance and large rotational deformation capacity. The stress (strain) in the joint module, consistent with the ‘diagonal compression bar’, was diagonally distributed. The high-stress connection bolt at the column end is located on both sides of the centerline along the direction of the beam length. The internal stress of concrete follows an antisymmetric distribution along the diagonal direction and diffuses outward at an angle of 45°.

本文介绍了三个模块化预制复合梁柱内部节点 (MPCIJ) 的准静态测试，分析了应变分布、延展性、能耗、强度和刚度退化。利用ABAQUS建立了三种有限元模型，并与准静态试验结果进行对比，验证其正确性。进一步分析了MPCIJs中不同材料的应力机制。结果表明，塑性漂移比的绝对值为6.41-8.01% rad，延性系数为3.50-4.50，等效粘滞阻尼系数为0.32-0.33。MPCIJs强度和刚度的整体退化性能相对稳定。MPCIJs具有良好的抗震性能和大的旋转变形能力。关节模块中的应力（应变），与“对角压缩杆”一致，呈对角分布。柱端高应力连接螺栓沿梁长度方向位于中心线两侧。混凝土内应力沿对角线方向呈反对称分布，并以45°角向外扩散。