This study investigates the seismic impact of concrete floors on reduced beam section beam-to-column joints through four quasi-static cyclic tests. We examine mechanical properties, failure modes, and processes against specific criteria. Additionally, we analyze hysteretic response, energy dissipation, stiffness, capacity, and stress–strain mechanisms. Moreover, the ABAQUS platform was used to reproduce the specimen nonlinear finite element model to compare and analyze the test results. The results showed that the specimens exhibit excellent energy dissipation capacity and ductility (with a coefficient of 5.00); the column-bar connection characteristics affect the maximum capacity and plastic hinge behavior in the reduced beam area. The reduced section of beam's upper flange could not improve the overall seismic performance of the joint. The observed failure sequence is as follows: concrete floor cracking, beam flange yielding, reinforcement fracture, lower flange yielding in the reduced beam area, and overall joint failure. This sequence confirms that the joint fulfills the design criteria of a “strong column-weak beam” by achieving the target of plastic hinge outward movement.

中文翻译：

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考虑混凝土楼板效应的减径梁截面节点抗震性能

本研究通过四次准静态循环试验研究了混凝土楼板对减少梁截面梁柱节点的地震影响。我们根据特定标准检查机械性能、故障模式和工艺。此外，我们还分析迟滞响应、能量耗散、刚度、容量和应力应变机制。此外，利用ABAQUS平台再现试件非线性有限元模型，对试验结果进行对比分析。结果表明，试件表现出优异的耗能能力和延展性（系数为5.00）；柱-杆连接特性影响梁面积减小时的最大承载力和塑性铰性能。梁上翼缘截面的减小并不能提高节点的整体抗震性能。观察到的破坏顺序如下：混凝土楼板开裂、梁翼缘屈服、钢筋断裂、梁面积缩小时翼缘屈服较低、接头整体破坏。这一序列证实了接头通过实现塑性铰向外移动的目标而满足“强柱弱梁”的设计标准。