新型钢结构梁端翼缘削弱型梁柱节点受力性能研究

Study on the mechanical behavior of new steel structure beam end flange weakened beam-column joints

为实现地震作用下塑性铰的外移,本文研究了新型梁端削弱型塑性铰节点的滞回耗能能力。使用有限元软件ABAQUS分别对5组模型进行数值模拟,分析各节点的滞回曲线、骨架曲线、刚度退化曲线、延性及塑性耗能曲线等。分析结果表明:新型节点的滞回曲线饱满、骨架曲线有明显的弹性与塑性阶段、刚度退化走势良好;延性指标显示随着拼接板削弱深度的增加,节点的延性也在增加;合适的削弱深度会增加节点的耗能能力。本文研究内容可为削弱型梁柱节点的应用与研究提供参考。

In order to realize the external displacement of the plastic hinge under the action of earthquake,the hysteretic energy dissipation capacity of the new beam end weakened plastic hinge joint is studied.The finite element software ABAQUS is used to analyze the five groups of models,and the hysteresis curves,skeleton curves,stiffness degradation curves,ductility and plastic energy dissipation curves of each node are analyzed.The analysis results show that the hysteresis curve,skeleton curve and stiffness degradation curve of the new node are good;the ductility index shows that the ductility of the node increases with the weakening depth of the splice plate;the appropriate weakening depth will increase the energy consumption of the node.The research content of this paper could provide reference for the application and research of weakened beam-column joints.