冷弯薄壁型钢开口三肢拼合立柱轴压性能有限元分析-学兔兔 www.xuetutu.com.pdf

学魚知w. wnetlltll.cm
第28卷第3期
建筑科学与工程学报
Vol 28 No. 3
2011年9月
Journal of Architecture and Civil Engineering
Sept. 2011
文章编号:16732049(2011)030119-08
冷弯薄壁型钢开口三肢拼合立柱轴压
性能有限元分析
刘向斌,周天华,聂少锋2,吴函恒2
(1.长安大学基建处,陕西西安710064:2,长安大学建筑工程学院,陕西西安710061)
摘要:建立了考虑材料、几何和接触非线性的有限元模型,利用 ANSYS有限元程序分析了长细比、
螺钉连接间距、載面板件最大宽厚比对冷弯薄壁型钢开口三肢拼合立柱轴压性能的影响。结果表
明:立柱长细比对A、B两类截面拼合立柱轴压承載力和轴压性能有很大影响,随着立柱长细比的
增大,立柱轴压极限承載力逐渐降低;当螺钉连接间距为450、300、150mm时,A、B两类截面拼合
立柱轴压极限承載力和刚度变化均不大;由于基本构件板材厚度不同引起截面板件最大宽厚比的
不同,对A、B两类截面3种长度的拼合立柱的承載力和刚度影响很大;对于A、B两类截面立柱,
当立柱长度和截面厚度相同时,基本构件腹板高度由89mm增加到140mm,拼合截面轴压立柱轴
压极限承載力变化不大。
关键词:冷弯薄壁型钢;拼合立柱;极限承载力;非线性有限元;轴压性能
中图分类号:TU392.1
文献标志码:A
Finite Element Analysis of Cold-formed Thin-walled Steel Three Open
Limbs Built-up Columns Under Axial Compression
LIU Xiang-bin ZHOU Tian-hua, NIE Shao-feng WU Han-heng
(1. Infrastructure Projects Office, Chang an University, Xian 710064, Shaanxi, China;
2. School of Civil Engineering, Chang an University, Xi'an 710061, Shaanxi, China)
Abstract: The finite element model involving materials nonlinearity, geometric nonlinearity and
contact nonlinearity was established, the influences of slenderness ratios, screw connection
spacings, maximum width-thickness ratios on cold-formed thin-walled steel three open limbs
built-up columns under axial compression were analyzed by using ANSYS finite element program
Results show that the slenderness ratio has great influence on the bearing capacity of axial
compression and the axial compression performance for class A, B section built-up columns, with
the increasc of the column slenderness ratio, the ultimate bearing capacity gradually decreases.
For two class scction built-up columns, when screw connection spacing has arranged 450, 300, 150
mm, the ultimate bearing capacity of axial compression and the rigidity are little affected. For the
three different lengths to the two class section built-up columns, as different thicknesses of the
basic component plates cause different width-thickness ratios of the section, the ultimate bearing
capacity of axial compression and the rigidity are obviously affected. When length and thickness
of class A, B section built-up columns are same, and the basic component web height is increased
收稿日期:2011-06-20
基金项目:陕西省自然科学基础研究计划项目(SJO8E211)
作者简介;刘向斌(1983-),男?陕西凤翔人、工学硕士,Ctail:lbx_818c163.com。