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Flexural behaviour of cold-formed steel square and rectangular hollow sections with moderate heat-treatment
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DOI：10.1016/j.jcsr.2022.107454.png)
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Abstract
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This paper discusses the flexural behaviour of cold-formed square and rectangular hollow steel sections (SHSs and RHSs) with subsequent heat-treatment through experimental and numerical investigations. Firstly, an experimental programme comprising tensile coupon tests on flat and corner regions and three-point bending beam tests were conducted. A total of 12 specimens were tested under monotonic bending loads, covering a variety of section slenderness. Failure modes, moment-rotation curves and plastic hinge lengths have been evaluated highlighting the effect of the web-flange interaction on rotation capacity. Successively, experimental results were combined with numerical FE results to assess the corresponding moment and deformation capac-ities. Current cross-section classification limits given in Eurocode 3 and AISC 360-16 were assessed and new limits has been proposed.
Keywords:
Structural hollow section
Cold-forming with heat-treatment
Bending tests
Finite element modelling
Cross-section classification
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