两跨连续方钢管桁架次应力的有限元分析  

FINITE ELEMENT ANALYSIS ON SECONDARY STRESS FOR TWO-SPAN CON TINUOUS SQUARE STEEL-PIPE TRUSS

作　　者：王慧[1] 程瑞杰 

机构地区：[1]华北水利水电学院,郑州450011 [2]河南第一火电建设公司,郑州450012

出　　处：《钢结构》2008年第4期4-7,共4页Steel Construction

摘　　要：对管桁结构的次应力问题进行研究,并以有限元软件ANSYS为平台,建立26榀理想铰接或具有一定刚性连接的两跨连续方钢管桁架模型。通过对比分析不同几何参数、次应力的分布状况以及次应力对结构整体受力性能的影响,结果表明,某些杆件的次应力已达到一定数值,且随几何参数的改变,呈现相应的变化规律,在设计时应予以考虑。In this article, the emphasis is put on the secondary stress of square steel-pipe truss. Based on FEA software ANSYS,26 two-span continuous square steel-pipe truss models with hinge joints or semi-rigid joints are presented,the distributions of secondary stress and the influences on the mechanical behavior of total structure are analysed. The results indicate that the secondary stress on several links has reached the certain value, and changes regularly following the change of geometric parameters. It should be considered in engineering design.

关 键 词：方钢管桁架 次应力 几何参数 

分 类 号：TU392.3[建筑科学—结构工程]