刘尚伦¹，  陈  雷²
    （1 联创国际北京分公司，北京100034；2 深圳市筑博工程设计有限公司北京分公司，北京100013）

[摘要] 以跨度为33m的人行天桥钢桁架为分析对象，对桁架和下部框架柱组成的整体模型与单独桁架模型的受力进行对比分析，确定了较为合适的计算模型，进而设计杆件截面与节点；对桁架腹杆与下弦H型钢组成的节点进行了有限元分析，分别选取支座节点和桁架节点为分析对象，对腹杆、型钢翼缘板、横向加劲肋在荷载作用下的von Mises应力分布进行分析，结果表明所设计的节点满足设计要求；本文的分析可为此类工程设计提供有益参考。
[关键词] 人行天桥；桁架；节点分析；有限元；von Mises应力
中图分类号：TU391    文献标识码：A    文章编号：1002-848X(2011) Sl-0847-06

    Analysis of pedestrian truss bridge and FEM analysis of truss joints
    Liu Shanglun¹, Chen Lei²
    (1 United Design Grou PBeijing, Inc., Beijing 100034, China; 2 Zhubo Architectural&Engineering Design Co., Ltd., Beijing 100013, China)

Abstract: As a object studied on the 30m span of pedestrian truss bridge, between the whole model of truss with supportmg structure and separate model were analyzed contrastively, appropriate model were established and section and joint were designed; Joint composed of the truss web members and bottom chord H-section steel were analyzed, supporting joint and truss joint were analyzed, and truss web members.steel flange plate.transverse stiffener plate of the von Mises stress distribution were also analyzed, which the results show that the designed joints were to meet the requirements. This analysis can benefit to the design of such projects.
Keywords: pedestrian truss bridge; truss; joint analysis; FEM; von Mises stress