等宽K型间隙方管节点静力工作性能的研究

焊接矩形管结构设计中的关键问题是节点的受力性能。利用非线性有限元分析方法，采用典型节点分析与较大规模几何参数分析相结合的研究手段，对等宽K型间隙方管节点的静力工作性能进行了研究。不仅跟踪了节点荷载－位移曲线的全过程，而且全面考察了主要参数对节点刚度、极限承载力、变形、失效模式等方面的影响，并将分析结果与CIDECT公式计算结果相比较，得出控制此类节点的失效模式主要是弦杆的整体 剪切失效、“有效宽度”失效、腹板局部承压破坏以及这几种破坏形式的混合模式。

Static behavior of gapped K-type full-width RHS-joints

The static behavior of gapped K type full width RHS joints is studied by using typical joint analysis and a large scale of variable parameter analysis methods. Not only the upward and downward phases of the load displacement curve are traced, but also the influence of the main parameters on the stiffness, ultimate capacity, deformation and failure modes of the joints are studied. The comparison of FEA results with CIDECT formula results shows that the shear failure of the entire chord section, chord wall bearing or local buckling under the compression bracing member, effective width failure or a combination of them are the main failure modes of the joint.