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为研究延性节点在整体钢框架中的抗震机理及性能,设计了3个缩尺比例为1∶3的不同节点构造形式的空间钢框架计算模型,分别为圆弧削弱型节点钢框架RBF、直接扩翼型节点钢框架KYF和普通标准节点型钢框架OSF,并利用ANSYS有限元分析软件进行了拟静力加载分析,创新性地采用二层施加位移、一层同时施加力荷载的同步混合加载制度施加水平地震作用。分析结果表明:圆弧削弱型节点钢框架和直接扩翼型节点钢框架均能较好地实现塑性铰外移的设计目的,有效保护了梁柱连接节点处焊缝不发生脆性破坏,并能延缓柱脚处的塑性变形和破坏。与普通节点钢框架相比,延性节点钢框架滞回曲线饱满、延性好、耗能能力强。
In order to study the seismic resistance mechanism and performance of ductile joints in the whole steel frame, three space steel frame calculation models with different node structures in scale ratio of 1: 3 are designed, which are arc-weakening node steel frame RBF, direct The airfoil with expanded joints and the common standard steel frame OSF, and the ANSYS finite element analysis software is used to analyze the quasi-static loading. The two layers are used to apply the displacement in a creative way, and a layer of synchronous mixed loading system Apply horizontal seismic action. The analysis results show that both the arc-weakening node steel frame and the direct-expanding node steel frame can achieve the goal of plastic hinge outward design effectively and effectively prevent the brittle fracture of the weld joint at the beam-column connection and can Delays the plastic deformation and destruction of the column foot. Compared with the common node steel frame, ductile steel frame hysteresis curve full, good ductility, energy-consuming ability.