Ran, Hongdong, Chen, Zhanpeng, Ma, Yunmei, Di Sarno, Luigi 
ORCID: 0000-0001-6244-3251 and Sun, Yao
(2023)
Local stability of laser-welded stainless steel slender I-sections under combined loading.
Journal of Constructional Steel Research, 200.
p. 107649.
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Abstract
This paper presents a comprehensive experimental and numerical investigation into the local buckling behaviour of laser-welded stainless steel slender I-sections under combined compression and bending moment. A testing programme was firstly carried out, including initial local geometric imperfection measurements and eccentric compression tests on ten laser-welded stainless steel slender I-section stub column specimens. Following the testing programme, a numerical modelling programme was conducted. Finite element models were developed and validated against the test results, and then adopted to perform parametric studies to generate additional numerical data. The obtained test and numerical data were used to evaluate the applicability of the interaction curves in the European and American codes and the continuous strength method to laser-welded stainless steel slender I-sections under combined loading. The evaluation results generally show that the three sets of considered interaction curves offer adequate design accuracy for laser-welded stainless steel slender I-sections under combined compression and major-axis bending moment, but they yield unduly conservative and scattered resistance predictions for laser-welded stainless steel slender I-sections under minor-axis combined loading, owing principally to the conservative minor-axis bending end points. Finally, an improved design interaction curve for the minor-axis combined loading case was developed and shown to yield substantially more accurate and consistent resistance predictions for laser-welded stainless steel slender I-sections under minor-axis combined loading than the three considered design methods. The reliability of the new design interaction curve was confirmed based on a reliability study.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Cross-sectional behaviour, Design codes, Eccentric compression tests, Laser-welding, New proposal, Stainless steel slender I-sections |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 07 Dec 2022 11:21 |
| Last Modified: | 18 Nov 2023 02:30 |
| DOI: | 10.1016/j.jcsr.2022.107649 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3166509 |
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