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

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

Issue:
2012年04期
Page:
1-6
Research Field:
Publishing date:

Info

Title:
Calculation Method for Bearing Capacity of Cold-formed Steel Built-up Columns Under Axial Compression
Author(s):
ZHOU Xu-hong1; 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
Keywords:
cold-formed steel;  bearing capacity under axial compression;  numerical analysis;  built-up effect;  bucking mode
PACS:
TU392.1
DOI:
-
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.

References:

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Last Update: 2012-12-20