崔家春^1,2
    （1 同济大学，上海200092；2 上海现代建筑设计（集团）有限公司，上海200041）

[摘要] 节点是桁架结构的重要组成部分，其强度与刚度直接决定了桁架体系的力学性能。对于一般的桁架，节点可以按照有关规范和图集进行设计。但是对于构件尺寸较大的桁架结构，现有规范和图集中的设计方法则不一定适用，必须利用有限元方法对其进行三维建模分析，以校核其强度，必要时还要分析局部板件的稳定性。本文对某展览中心巨型桁架节点进行有限元分析，研究现有节点设计方法的适用性。通过分析结果提出了合理的建议，供其他工程参考。
[关键词] 巨型桁架；焊接节点；有限单元法；非线性分析
中图分类号：TU391    文献标识码：A    文章编号：1002-848X(2011) Sl-0840-03

    Finite element analysis on mega-truss joints of an exhibition center
    Cui Jiachun^1,2
    (1 Tongji University, Shanghai 200092, China; 2 Shanghai Xian Dai Architectural Design( Group)  Co., Ltd., Shanghai 200041, China)

Abstract: Joint is an important part of truss structure, its strength and stiffness directly determines mechanical properties of the truss system. For general truss structure, node can be designed in accordance with specifications and collective drawings. But for truss structure with larger span and larger section size, the existing design specifications and collective drawings may not applicable;a three-dimensional finite element analysis must be done to check its strength and, local stability of panels if necessary. A truss joint of an exhibition center is analyzed by finite element method to study the applicability of the existing design method for joint. By results some reasonable proposals are put forwarded that can be reference for other projects.
Keywords: mega-truss; welded joint; firute element method; non-linear analysis