蜂窝梁钢框架十字型节点抗震性能分析

Analysis of Hysteresis Performance of Cross-Type Nodes of Steel Frames with Cellular Beams

为研究蜂窝梁–实腹柱框架中节点的受力性能,利用ABAQUS有限元软件对不同开孔率和开孔位置的蜂窝梁实腹柱十字型节点足尺模型进行了数值模拟分析,详细研究了蜂窝梁–实腹柱十字型节点的破坏模式、塑性铰产生位置、滞回曲线、骨架曲线、延性性能和耗能能力。结果表明:适当地调整蜂窝梁–实腹柱十字型节点的开孔率和开孔位置可以很好地将塑性铰由节点域向梁上第1个孔洞处转移;当开孔率为60%,首孔距离为400 mm时;蜂窝梁–实腹柱十字型节点的承载力较高,滞回曲线饱满,具有良好的延性与耗能能力,符合“强柱弱梁;强节点弱构件”的抗震设计要求。

To study the stress performance of nodes in cellular beam-solid web column frames, numerical simulations were carried out using ABAQUS finite element software to analyze the foot-rule model of cellular beam-solid web column cross-shaped nodes with different opening rates and opening positions, and the damage modes, plastic hinge generation locations, hysteresis curves, and hysteresis curves of cellular beam-solid web column cross-shaped nodes were studied in detail. The hysteresis curve, skeleton curve, ductility performance and energy dissipation capacity of the cellular beam-solid web cross-shaped node were studied in detail. The results show that the plastic hinge can be transferred from the node domain to the first hole in the beam by properly adjusting the opening rate and the opening position of the cellular beam-solid web cross-shaped node;when the opening rate is 60% and the distance of the first hole is 400 mm, the node has a high load capacity, a full hysteresis curve and good ductility and energy dissipation capacity. It meets the seismic design requirements of “strong column and weak beam;strong node and weak member”.