几种典型钢框架节点连接性能的有限元仿真分析

采用有限元程序ABAQUS进行仿真分析,探讨了钢框架节点的非线性连接性能。针对几种典型节点,包括焊接连接、外伸式端板螺栓连接、平齐式端板螺栓连接、双腹板顶底角钢连接等,分别建立了相应的精化有限元分析模型,实现了结构非线性行为的真实再现和连接性能的准确评估。数值结果还给出了钢框架节点的弯矩-相对转角、弯矩-剪切转角及弯矩-节点转角三种关系曲线,并针对弯矩-节点转角曲线进行了回归分析,从而得到了四种钢框架节点的弯矩-节点转角关系式。建立的有限元分析模型可真实地模拟钢框架节点的非线性行为,分析得到了半刚性节点弯矩-转角关系的一般规律,可为钢框架梁柱连接节点的计算理论和设计方法提供重要参考和依据。

Finite element simulation analysis on connections performance of several typical steel frame joints

Finite element program ABAQUS is adopted for simulation analysis in this paper.Nonlinear connection performance of steel frame joints is discussed.The corresponding refined finite element analysis models are established for several typical joints,including the welding connection,the extended end-plate bolted connection,the flush end-plate bolted connection and the double web top-seat angle connection.The real representation of the nonlinear behavior of structure and the accurate evaluation of the connection performance are realized.Three relation curves are given in numerical results,including the moment-relative rotation,the moment-shear rotation and the moment-rotation curves.And according to the regression analysis of the moment-rotation curve,the moment-rotation expression of four steel frame joints is obtained.The finite element models can be used to simulate the nonlinear behavior of steal frame joints,and the general rule of moment-angle relationship is obtained.It provides an important reference and basis for the calculation theory and design method of beam-column connection joints of steel frame.