【摘要】 对焊接孔尺寸变化的钢框架梁 柱刚性节点进行了空间非线性有限元分析。结果表明 ,焊接孔长度的扩大显著地降低了梁 柱连接面处对接焊缝和焊接孔切角端开裂以及翼缘脆性破坏的可能性 ,但过长的焊接孔也会导致梁翼缘侧向稳定的丧失。焊接孔高度的降低只有利于目前常用的焊接孔长度较短的“标准型”节点。更多还原

【Abstract】 The effect of changing the size of access hole on the behavior of steel beam-column moment connections is studied through 3D nonlinear finite-element analyses of connection subassemblies.The analytical results show that increasing the length of access hole remarkably minimizes the potential of fracture at the groove welds of beam-column interface and the root of access hole,therefore the potential of brittle failures in the beam flange is reduced.But over increasing the length of the access hole will give rise to the loss of lateral stability of beam flange.Reducing the height of the access hole only does benefit to the standard connection in common use whose length of the access hole is shorter; for the fracture potential at the root of the access hole is minimized.更多还原