矩形钢管混凝土K型节点数值分析探讨

Investigation on Numerical Simulation of Concrete-filled Rectangular Steel Tube K-joints

采用有限元分析技术,针对矩形钢管混凝土桁架K型节点的受力性能问题,进行了非线性数值模拟,计算值与试验值吻合较好。结果表明,论文所建立的三维有限元模型是有效的。通过研究钢管混凝土K型节点典型的荷载-变形全过程关系曲线的特征,考察了节点区域受力变形发展过程、应力应变分布情况以及钢管和混凝土相互作用等受力机理。

In this paper, the finite element analysis technique is used to analyze the mechanical behavior of the Concrete-Filled Rectangular Steel Tube(CFRST)K-joints, and the nonlinear numerical simulation is carried out. and the calculated results were agreed well with the experimental ones. The results show that the 3D finite element analysis model is effective. By analysis to the characteristics of typical load-deformation curves of the CFRST K-joints, the developments of the forces and deformations in the joint region were investigated. The stress and strain distribution over the joint region and the interaction between the steel tubular wall and the core concrete were also studied.