Abstract
This paper presents an analytical study of the flexural buckling and lateral–torsional buckling of cold-formed
steel channel section beams subject to combined compression and bending about their major and minor axes.
For channel section beams a bending about the minor axis creates a non-symmetric pre-buckling stress distribution,
which has a significant influence on the lateral–torsional buckling of the beams. This kind of feature
has not been discussed in the existing literature. The focus of this present study is the interaction between the
compression load and the bending moments about the major and minor axes. It has been found that for a section
subject to combined compression and the major-axis bending the bending moment will decrease the
critical compression load, although the critical value of the largest compressive stress in the section actually
increases with the applied bending moment. However, for a section subject to combined compression and
the minor-axis bending the effect of the bending moment on the critical compression load depends on the
direction of bending applied. For bending that creates a compressive stress in the lips the bending moment
will reduce the critical compression load. However, for bending that creates a compressive stress in the
web the bending moment has almost no influence on the critical compression load.
Original language | English |
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Pages (from-to) | 174-180 |
Number of pages | 0 |
Journal | Journal of Constructional Steel Research |
Volume | 80 |
Issue number | 0 |
DOIs | |
Publication status | Published - 1 Jan 2013 |
Keywords
- Cold-formed
- Channel sections
- Lateral–torsional buckling
- Combined compression and bending
- Interactive buckling