矩形钢管混凝土节点域受剪承载力计算

Analysis of Shear Load-carrying Capacity of Concrete-filled Rectangular Tube Joint Region

由于对矩形钢管混凝土梁柱连接节点受力性能的研究较少,现有理论和试验研究不完善。本文介绍了带内隔板的矩形钢管混凝土柱-钢梁节点域的构造措施,提出了矩形钢管混凝土梁柱节点域受剪屈服机制,根据薄腹板梁受剪理论分析节点域钢管受剪承载力,根据斜压短柱理论分析节点域混凝土受剪承载力,应用虚功原理推导出节点域受剪承载力计算公式,将公式计算值与试验数据、现行规程公式和有限元计算结果进行比较分析。分析结果表明,本文公式概念明确,应用简单,与试验数据值吻合较好,且偏安全,可供工程设计参考。

There are few reports on the connecting method between CFRT column and steel beam. The existing theories and experimental research about the joint region are not perfect. This paper analyzed the construction and the shear yield mechanism of joint region of CFRT column and steel beam with internal diaphragms. The shear load-bearing mechanism theory of beam with thin web plate and the strut mechanism were used respectively in the analysis of shear load- bearing capacity of web plate and concrete of the joint region. Then the formulas of how to calculate the shear load- bearing capacity of the joint region were concluded by applying the virtual work principle. And then, the comparison between the formulas given in this paper and those of the code as well as experiment data given by others and simulation analysis with FEM were presented. The formulas given by this paper are simple, safe and the comparison shows that the formulas result coincide with experiment data. So these formulas can be used as reference for engineering design.