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Experimental investigation on axial compression behaviour of cold-formed thick-walled steel tubes
Abstract This paper presents an experimental and numerical investigation on the stability behaviour of cold-formed thick-walled steel tubes. Axial compression tests were conducted on 15 steel tubes with square and rectangle cross-sections to investigate their structural behaviours. The primary test parameters were slenderness and width-to-thickness ratios. Material properties, failure modes, load-deflection curves, and load-strain curves of the specimens are discussed. Furthermore, a numerical simulation was conducted to further investigate the effects of the slenderness ratio, width-to-thickness ratio, and initial geometric imperfection on the axial compression behaviour of cold-formed thick-walled tubes. Based on the experimental and numerical results, the applicability of the design codes, GB50018–2002, AISI S100–16, and EN 1993-1-1 was assessed. Results revealed that all three codes predicted the yield strength well after considering the cold-formed effect. With an increase in the slenderness ratio, GB50018–2002 and AISI S100–16 yielded increasingly unsafe predictions for overall stability, whereas EN 1993-1-1 yielded safe predictions. Finally, a modified design method for the overall buckling resistance of cold-formed thick-walled rectangular tubes under axial compression was proposed based on EN 1993-1-1 and verified using test and FEM results.
Highlights Axial compression behaviour of cold-formed thick-walled steel tubes is studied. Cold-formed thick-walled steel tubes with square and rectangle sections were tested. A nonlinear finite element model was developed and verified using tests results. Eurocode 3 well predicted axial resistances of cold-formed thick-walled steel tubes. A modified method for predicting axial overall buckling resistances was proposed.
Experimental investigation on axial compression behaviour of cold-formed thick-walled steel tubes
Abstract This paper presents an experimental and numerical investigation on the stability behaviour of cold-formed thick-walled steel tubes. Axial compression tests were conducted on 15 steel tubes with square and rectangle cross-sections to investigate their structural behaviours. The primary test parameters were slenderness and width-to-thickness ratios. Material properties, failure modes, load-deflection curves, and load-strain curves of the specimens are discussed. Furthermore, a numerical simulation was conducted to further investigate the effects of the slenderness ratio, width-to-thickness ratio, and initial geometric imperfection on the axial compression behaviour of cold-formed thick-walled tubes. Based on the experimental and numerical results, the applicability of the design codes, GB50018–2002, AISI S100–16, and EN 1993-1-1 was assessed. Results revealed that all three codes predicted the yield strength well after considering the cold-formed effect. With an increase in the slenderness ratio, GB50018–2002 and AISI S100–16 yielded increasingly unsafe predictions for overall stability, whereas EN 1993-1-1 yielded safe predictions. Finally, a modified design method for the overall buckling resistance of cold-formed thick-walled rectangular tubes under axial compression was proposed based on EN 1993-1-1 and verified using test and FEM results.
Highlights Axial compression behaviour of cold-formed thick-walled steel tubes is studied. Cold-formed thick-walled steel tubes with square and rectangle sections were tested. A nonlinear finite element model was developed and verified using tests results. Eurocode 3 well predicted axial resistances of cold-formed thick-walled steel tubes. A modified method for predicting axial overall buckling resistances was proposed.
Experimental investigation on axial compression behaviour of cold-formed thick-walled steel tubes
Men, Pengfei (author) / Di, Jin (author) / Qin, Fengjiang (author) / Lin, Enze (author) / Wang, Jie (author) / Peng, Xi (author)
2023-12-20
Article (Journal)
Electronic Resource
English
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