Behavior of H-Beam to Square-Tube-Column Connection without Stiffener

提出了一种方管柱钢框架梁柱连接的新设计方法，使梁的纵向与柱截面的对角线重合。在系列I试验中，研究了焊接到柱上的梁的法兰在受压或受拉作用下连接的局部强度。根据试验结果，给出了考虑连接弹性刚度和屈服强度的有效管壁宽度公式。管内填充的混凝土增加了连接的强度和刚度。在系列II中，对8个十字形试件进行了重复荷载试验，其中4个采用了建议的连接方式，其余的采用了常规的连接方式。这些柱子要么是空心的，要么是用混凝土填充的。试验结果表明，无加劲连接框架可以实现强柱弱梁的破坏机制。

A new design method is proposed for beam-to-column connections in steel building frame with square-tube column so that the longitudinal direction of the beams coincides with the diagonal of the column cross section. In the test of series I, local strength of the connection were investigated under compression or tension force from flanges of beam that are welded to the column. Based on the test results, effective width of the tube wall are formulated for elastic rigidity and yield strength of the proposed connection. Concrete-filled in the tube increased both strength and rigidity of the connection.In the series II, eight cruiciform specimens were tested under repeated load, four of them with the proposed connection and the rest with a conventional connection. the columns were either hollow or filled with concrete. the test results show that the strong-column, weak-beam collapse mechanism can be achieved in frames with non-stiffener connection.