Experimental and numerical investigations of press-braked stainless steel channel section beam-columns
The buckling behaviour and resistances of press-braked stainless steel channel section beam-columns under combined compression and minor-axis bending have been studied in the present paper through laboratory testing and numerical modelling. The testing programme adopted two press-braked stainless st...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/160087 |
| _version_ | 1824454737196482560 |
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| author | Zhang, Lulu Li, Shuai Tan, Kang Hai Zhao, Ou |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Zhang, Lulu Li, Shuai Tan, Kang Hai Zhao, Ou |
| author_sort | Zhang, Lulu |
| collection | NTU |
| description | The buckling behaviour and resistances of press-braked stainless steel channel section beam-columns under combined compression and minor-axis bending have been studied in the present paper through laboratory testing and numerical modelling. The testing programme adopted two press-braked stainless steel channel sections and included initial global and local geometric imperfection measurements and ten beam-column tests. Two types of failure mode, namely ‘C’-orientation buckling (indicating that failure specimens buckled towards the web) and ‘reverse C’-orientation buckling (signifying that failure specimens buckled towards the flange tips), were observed upon testing. The testing programme was followed by a numerical modelling programme; finite element models were developed and validated against the test results and then adopted to perform parametric studies to generate further numerical data on press-braked stainless steel channel section beam-columns over a wide range of cross-section dimensions, member effective lengths and loading combinations. The obtained experimental and numerical data were employed to assess the accuracy and consistency of the relevant codified design rules for press-braked stainless steel channel section beam-columns, as given in the European code, American specification and Australian/New Zealand standard. The results of assessment revealed that the European code yields many unsafe resistance predictions for Class 1 and 2 press-braked stainless steel channel section beam-columns but overly conservative resistance predictions for Class 3 press-braked stainless steel channel section beam-columns, although the resulting overall design accuracy is good, but with a high level of scatter of the resistance predictions. Compared with the European code, the American specification and Australian/New Zealand standard result in slightly more accurate resistance predictions for press-braked stainless steel channel section beam-columns with buckling in the ‘C’ orientation, but lead to significantly more conservative predicted resistances for press-braked stainless steel channel section beam-columns with buckling in the ‘reverse C’ orientation. In terms of the design consistency, the American specification and Australian/New Zealand standard were shown to result in more consistent resistance predictions (regardless of cross-section dimensions and buckling orientations) than their Eurocode counterpart. |
| first_indexed | 2025-02-19T03:27:04Z |
| format | Journal Article |
| id | ntu-10356/160087 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:27:04Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1600872022-07-12T08:11:06Z Experimental and numerical investigations of press-braked stainless steel channel section beam-columns Zhang, Lulu Li, Shuai Tan, Kang Hai Zhao, Ou School of Civil and Environmental Engineering Engineering::Civil engineering Beam-Column Tests Combined Loading The buckling behaviour and resistances of press-braked stainless steel channel section beam-columns under combined compression and minor-axis bending have been studied in the present paper through laboratory testing and numerical modelling. The testing programme adopted two press-braked stainless steel channel sections and included initial global and local geometric imperfection measurements and ten beam-column tests. Two types of failure mode, namely ‘C’-orientation buckling (indicating that failure specimens buckled towards the web) and ‘reverse C’-orientation buckling (signifying that failure specimens buckled towards the flange tips), were observed upon testing. The testing programme was followed by a numerical modelling programme; finite element models were developed and validated against the test results and then adopted to perform parametric studies to generate further numerical data on press-braked stainless steel channel section beam-columns over a wide range of cross-section dimensions, member effective lengths and loading combinations. The obtained experimental and numerical data were employed to assess the accuracy and consistency of the relevant codified design rules for press-braked stainless steel channel section beam-columns, as given in the European code, American specification and Australian/New Zealand standard. The results of assessment revealed that the European code yields many unsafe resistance predictions for Class 1 and 2 press-braked stainless steel channel section beam-columns but overly conservative resistance predictions for Class 3 press-braked stainless steel channel section beam-columns, although the resulting overall design accuracy is good, but with a high level of scatter of the resistance predictions. Compared with the European code, the American specification and Australian/New Zealand standard result in slightly more accurate resistance predictions for press-braked stainless steel channel section beam-columns with buckling in the ‘C’ orientation, but lead to significantly more conservative predicted resistances for press-braked stainless steel channel section beam-columns with buckling in the ‘reverse C’ orientation. In terms of the design consistency, the American specification and Australian/New Zealand standard were shown to result in more consistent resistance predictions (regardless of cross-section dimensions and buckling orientations) than their Eurocode counterpart. Nanyang Technological University The authors thank Outokumpu Oyj and Stalatube for sponsoring grade EN 1.4420 stainless steel sheets and manufacturing press-braked channel sections. The first author is also grateful to the financial support from the NTU research scholarship. 2022-07-12T08:11:05Z 2022-07-12T08:11:05Z 2021 Journal Article Zhang, L., Li, S., Tan, K. H. & Zhao, O. (2021). Experimental and numerical investigations of press-braked stainless steel channel section beam-columns. Thin-Walled Structures, 161, 107344-. https://dx.doi.org/10.1016/j.tws.2020.107344 0263-8231 https://hdl.handle.net/10356/160087 10.1016/j.tws.2020.107344 2-s2.0-85099159628 161 107344 en Thin-Walled Structures © 2020 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Civil engineering Beam-Column Tests Combined Loading Zhang, Lulu Li, Shuai Tan, Kang Hai Zhao, Ou Experimental and numerical investigations of press-braked stainless steel channel section beam-columns |
| title | Experimental and numerical investigations of press-braked stainless steel channel section beam-columns |
| title_full | Experimental and numerical investigations of press-braked stainless steel channel section beam-columns |
| title_fullStr | Experimental and numerical investigations of press-braked stainless steel channel section beam-columns |
| title_full_unstemmed | Experimental and numerical investigations of press-braked stainless steel channel section beam-columns |
| title_short | Experimental and numerical investigations of press-braked stainless steel channel section beam-columns |
| title_sort | experimental and numerical investigations of press braked stainless steel channel section beam columns |
| topic | Engineering::Civil engineering Beam-Column Tests Combined Loading |
| url | https://hdl.handle.net/10356/160087 |
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