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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

29卷

期数:

2012年04期

页码:

1-6

栏目:

出版日期:

2012-12-30

文章信息/Info

Title:

Calculation Method for Bearing Capacity of Cold-formed Steel Built-up Columns Under Axial Compression

作者:

周绪红^1,2,李喆¹,刘永健¹,石宇¹

1. 长安大学 建筑工程学院,陕西 西安 710061; 2. 兰州大学 土木工程与力学学院,甘肃 兰州 730000

Author(s):

ZHOU Xu-hong^1,2, LI Zhe¹, LIU Yong-jian¹, SHI Yu¹

1. School of Civil Engineering, Chang'an University, Xi'an 710061, Shaanxi, China; 2. School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, Gansu, China

关键词:

冷弯薄壁型钢;  轴压承载力;  数值分析;  拼合效应;  屈曲模态

Keywords:

cold-formed steel;  bearing capacity under axial compression;  numerical analysis;  built-up effect;  bucking mode

分类号:

TU392.1

DOI:

-

文献标志码:

A

摘要:

为了研究冷弯薄壁型钢拼合截面柱的轴压承载力,对各国有关冷弯薄壁型钢拼合截面柱的轴压试验进行了ANSYS有限元模拟分析,有限元计算结果与试验结果吻合良好,从而验证了有限元方法的正确性。采用有限元方法分析了构件截面形式、截面尺寸以及长细比对冷弯薄壁型钢拼合截面柱拼合效应的影响,提出了冷弯薄壁型钢拼合截面柱轴压承载力的简化计算方法。分析结果表明:随着长细比的增大,拼合截面柱的拼合效应随之增大。对于主要通过螺钉将腹板进行拼合的构件,当翼缘宽厚比一定时,随着截面宽高比的增大,腹板拼合的整体性增强,从而使拼合效应增大,而截面面积的改变对拼合效应的影响则不是很明显。

Abstract:

In order to investigate bearing capacity of cold-formed steel built-up columns under axial compression, authors used ANSYS finite element program to analyze the cold-formed steel built-up columns at home and abroad. Compared with experimental results, the validity of the finite element method(FEM)was verified. Furthermore, a detailed parametric study by FEM was carried out to mainly determine the influence of cross-section form, cross-section dimension and slenderness ratio of component for the built-up effect. The simplified calculation method to the bearing capacity of cold-formed steel built-up columns under axial compression was extracted. The analytical results show that with the increase of the slenderness ratio, the built-up effect improves. As for these columns connected with screws through web, when width-thickness ratio of flange is certain, with the increase of width-height ratio of cross-section, the integrity of the built-up web increases, which leads the built-up effect to strengthen. But the influences of different areas of cross-sections are not so obvious.

参考文献/References:

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备注/Memo

备注/Memo:

收稿日期:2012-10-12
基金项目:国家自然科学基金项目(51108033); 中央高校基本科研业务费专项资金项目(CHD2012ZD006)
作者简介:周绪红(1956-),男,湖南南县人,教授,博士研究生导师,中国工程院院士,工学博士,E-mail:zhouxuhong@126.com。

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更新日期/Last Update: 2012-12-20