The elasto-plastic behaviors of joint panels at the connection of rectangular steel column and two H-shaped beams with different depth

本文对矩形钢柱与两根不同高度的H型梁节点板的弹塑性性能进行了研究。从理论上推导了这些板的弯矩、平衡方程、弹性刚度和抗剪强度。并对节点板进行了试验。试件为矩形钢柱与两根不同高度的H型梁连接处节点板的十字形组合。试验参数为梁高差、轴力比差和宽厚比差。结果表明：(1)柱与等高两梁连接处的标准板的弯矩、平衡方程和弹性刚度公式与标准板基本相同。(2)通过塑性分析，从理论上推导了标准板的抗剪强度。在这一分析中，考虑了两种坍塌机制。一种是板材为塑性的机理，另一种是板材、梁翼缘和梁腹板的局部为塑性的机理。(3)理论推导的抗剪强度和破坏机理与试验结果吻合较好。

In this paper, the elasto-plastic behavior of joint panels at the connection of rectangular steel column and two H-shaped beams with different depth are reported. Panel moment, equilibrium equation, elastic stiffness and shear strength of these panels are derived theoretically. And the tests of the joint panels are carried out. The specimens are cruciform subassemblages of the joint panels at the connection of rectangular steel column and two H-shaped beams with different depth. The parameters of these tests are difference of beam depth, axial force ratio and width-thickness ratio. The result are as follows.(1) The formulas of panel moment, equilibrium equation and elastic stiffness are almost the same ones of the standard panel at the connection of column and two beams with same depth.(2) The shear strength of those panel is derived theoretically, using plastic analysis. In this analysis, two collapse mechanism are considered. One is the mechanism in which panel is plastic, the other is the mechanism in which parts of panel, beam flange and beam web are plastic.(3) The shear strength and collapse mechanism derived theoretically were good agreement with results of test.