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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Experimental study of laser-welded stainless steel angle columns
https://orcid.org/0000-0002-5367-6843
https://orcid.org/0000-0003-1001-9154
https://orcid.org/0000-0003-3005-6251
https://orcid.org/0000-0002-3910-5534
Abstract Substantial research has been conducted in the last years into the structural responses of cold-formed and hot-rolled stainless steel equal-leg angle columns, whereas there is no experimental data on laser-welded stainless steel angle columns despite these sections being increasingly used in the modern construction industry. To fill this gap and provide benchmarks for design, a comprehensive experimental investigation into the structural strength and stability of laser-welded austenitic stainless steel equal-leg angle columns under pure axial compression was performed and described in this paper. A series of laboratory tests, performing on two test groups of specimens with nominal dimensions of 60 6 mm and 100 10 mm and different lengths, involved 6 stub column tests and 20 global buckling tests together with measurements on material properties, initial geometric imperfections and residual stresses. The experimental observations reveal that the column ultimate capacity and prevalent failure mode – major-axis flexural–torsional buckling and minor-axis flexural buckling – are highly dependent on the column slenderness and initial imperfections. The full load-lateral displacement, load-torsional rotation and load-axial strain responses of the specimens were fully reported and discussed. The results were employed to evaluate the accuracy of the current European and North American stainless steel design standards. The evaluation results revealed that the codified design procedures yield conservative resistance predictions of laser-welded stainless steel equal-leg angle columns, showing a prospective for their modification and improvement by providing more optimized and realistic results in design considering the actual residual stress distributions, material nonlinearity and strain hardening.
Highlights Residual stress distribution in laser-welded angles found using the sectioning method. Twenty-six laser-welded stainless steel equal-leg angle columns were tested. Different buckling responses were systematically examined. Buckling loads conservatively predicted by European and North American design codes.
Experimental study of laser-welded stainless steel angle columns
https://orcid.org/0000-0002-5367-6843
https://orcid.org/0000-0003-1001-9154
https://orcid.org/0000-0003-3005-6251
https://orcid.org/0000-0002-3910-5534
Abstract Substantial research has been conducted in the last years into the structural responses of cold-formed and hot-rolled stainless steel equal-leg angle columns, whereas there is no experimental data on laser-welded stainless steel angle columns despite these sections being increasingly used in the modern construction industry. To fill this gap and provide benchmarks for design, a comprehensive experimental investigation into the structural strength and stability of laser-welded austenitic stainless steel equal-leg angle columns under pure axial compression was performed and described in this paper. A series of laboratory tests, performing on two test groups of specimens with nominal dimensions of 60 6 mm and 100 10 mm and different lengths, involved 6 stub column tests and 20 global buckling tests together with measurements on material properties, initial geometric imperfections and residual stresses. The experimental observations reveal that the column ultimate capacity and prevalent failure mode – major-axis flexural–torsional buckling and minor-axis flexural buckling – are highly dependent on the column slenderness and initial imperfections. The full load-lateral displacement, load-torsional rotation and load-axial strain responses of the specimens were fully reported and discussed. The results were employed to evaluate the accuracy of the current European and North American stainless steel design standards. The evaluation results revealed that the codified design procedures yield conservative resistance predictions of laser-welded stainless steel equal-leg angle columns, showing a prospective for their modification and improvement by providing more optimized and realistic results in design considering the actual residual stress distributions, material nonlinearity and strain hardening.
Highlights Residual stress distribution in laser-welded angles found using the sectioning method. Twenty-six laser-welded stainless steel equal-leg angle columns were tested. Different buckling responses were systematically examined. Buckling loads conservatively predicted by European and North American design codes.
Experimental study of laser-welded stainless steel angle columns
https://orcid.org/0000-0002-5367-6843
https://orcid.org/0000-0003-1001-9154
https://orcid.org/0000-0003-3005-6251
https://orcid.org/0000-0002-3910-5534
Abstract Substantial research has been conducted in the last years into the structural responses of cold-formed and hot-rolled stainless steel equal-leg angle columns, whereas there is no experimental data on laser-welded stainless steel angle columns despite these sections being increasingly used in the modern construction industry. To fill this gap and provide benchmarks for design, a comprehensive experimental investigation into the structural strength and stability of laser-welded austenitic stainless steel equal-leg angle columns under pure axial compression was performed and described in this paper. A series of laboratory tests, performing on two test groups of specimens with nominal dimensions of 60 6 mm and 100 10 mm and different lengths, involved 6 stub column tests and 20 global buckling tests together with measurements on material properties, initial geometric imperfections and residual stresses. The experimental observations reveal that the column ultimate capacity and prevalent failure mode – major-axis flexural–torsional buckling and minor-axis flexural buckling – are highly dependent on the column slenderness and initial imperfections. The full load-lateral displacement, load-torsional rotation and load-axial strain responses of the specimens were fully reported and discussed. The results were employed to evaluate the accuracy of the current European and North American stainless steel design standards. The evaluation results revealed that the codified design procedures yield conservative resistance predictions of laser-welded stainless steel equal-leg angle columns, showing a prospective for their modification and improvement by providing more optimized and realistic results in design considering the actual residual stress distributions, material nonlinearity and strain hardening.
Highlights Residual stress distribution in laser-welded angles found using the sectioning method. Twenty-six laser-welded stainless steel equal-leg angle columns were tested. Different buckling responses were systematically examined. Buckling loads conservatively predicted by European and North American design codes.
Experimental study of laser-welded stainless steel angle columns
Filipović, Aljoša (Autor:in) / Dobrić, Jelena (Autor:in) / Buđevac, Dragan (Autor:in) / Fric, Nenad (Autor:in) / Baddoo, Nancy (Autor:in)
Thin-Walled Structures ; 164
30.03.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Flexural buckling of laser-welded stainless steel T-section columns
| Elsevier | 2023