管节点承载力的非线性有限元分析

NONLINEAR FINITE ELEMENT ANALYSIS FOR THE ULTIMATE STRENGTH OF MULTIPLANNAR TUBULAR JOINT

本文提出了运用四边形等参壳元构造管节点有限元模型，用自动步长增量法来计算管节点的极限承载力：在ＡＤＩＮＡ程序的基础上开发了前处理和后处理程序，使管节点（包括空间管节点）的有限元分析的成本大大降低；平面管节点的算例表明本文方法与实验结果相吻合，在此基础上本文提出并计算了圆管与矩形管管节点。

A four-node general quadrilateral shell element for geometric and material non-linear analysis is employed in the modeling of tubular joint, an automatic incremental algorithm is adopted in the solution of nonlinear finite element equations. Based on the ADINA code, the preprocessing and post-processing programs are developed which reduce the computational cost of the ultimate strength of multiplannar tubular joints including joints between circular hollow sections, joints between square hollow sections and circular hollow sections. Numerical results are compared with to the experimental results. Good agreement is achieved.