空间TK形钢管相贯节点极限承载力有限元分析

Finite Element Analysis on Bearing Capability of Multi-planar TK Steel Tubular Joints

通过考虑材料非线性和几何非线性,利用有限元方法对TK形空间钢管结构相贯节点的应力分布、塑性区的扩展过程以及节点变形等重要力学性能进行分析,研究了影响钢管节点承载力的主要参数以及这些参数与承载力之间的关系,在参考平面K形节点承载力计算公式,以及一些参考资料基础上,考虑多杆件汇交和多轴受力的影响。

An ideal elastic-plastic material is assumed,along with the material and geometry being considered nonlinear.With the finite element method,the distribution of stress,plastic-zones and deformation of joints is studied on multi-planer TK steel tubular joints through various geometric parameters by using the nonlinear finite element analysis in this paper.The primary parameters and the influence of these parameters on the ultimate strength are investigated.Based on the bearing capacity formula of K-joint and some reference data,the strength formula for multi-planar TK joints is suggested in view of the effects of multi-staff intersection and multi-axis bearing force.