Structural behavior of built-up I-shaped CFS beams
The use of back-to-back built-up C-section beams is becoming increasingly common in CFS construction due to their cost-effectiveness and enhanced load-carrying capacity, making them suitable for longer beam spans and convenient for transportation. These built-up sections are utilized in wall studs,...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-12-01
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| Series: | Results in Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123024012180 |
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| author | Ardalan B. Hussein Diyari B. Hussein |
| author_facet | Ardalan B. Hussein Diyari B. Hussein |
| author_sort | Ardalan B. Hussein |
| collection | DOAJ |
| description | The use of back-to-back built-up C-section beams is becoming increasingly common in CFS construction due to their cost-effectiveness and enhanced load-carrying capacity, making them suitable for longer beam spans and convenient for transportation. These built-up sections are utilized in wall studs, truss components, and floor joists, with intermediate screw fasteners placed at specific intervals to prevent the separate bowing of channels. This study reveals a ratio of 1.003 between experimental findings and finite element analysis results, and 1.002 between experimental findings and direct strength method results, indicating a strong correlation between experimental data from nonlinear finite element analysis and predictions based on the American Iron and Steel Institute and Australian and New Zealand Standards, particularly in predicting the flexural buckling strength of beam specimens. Furthermore, ongoing research is investigating the impact of screw spacing on flexural strength. This study presents results from 175 finite element tests, evaluating seven distinct cross-sections with twelve unique screw spacings. These spacings correspond to the half wavelength of local, distortional, and global buckling, divided by values from one to four. It was found that screw spacing based on half the local buckling half-wavelength along the centerline of the webs increased the critical global buckling moment capacity and the nominal flexural strength by 56 % and 27 %, respectively. For double-lane screws with the same spacing, these increases were even more substantial, reaching 65 % and 31 %, respectively. Economically, the recommended spacing for single-lane screws is half the local buckling half-wavelength. |
| format | Article |
| id | doaj-art-acbabb7e09cc41aa95e2f05c40e3ff7c |
| institution | Kabale University |
| issn | 2590-1230 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj-art-acbabb7e09cc41aa95e2f05c40e3ff7c2024-12-19T10:57:36ZengElsevierResults in Engineering2590-12302024-12-0124102963Structural behavior of built-up I-shaped CFS beamsArdalan B. Hussein0Diyari B. Hussein1Department of Structural Engineering and Geotechnics, Széchenyi István University, Egyetem Tér 1, 9026, Győr, Hungary; Corresponding author.Department of Architectural Engineering, Cihan University Sulaimaniya, Sulaimaniya, 46001, IraqThe use of back-to-back built-up C-section beams is becoming increasingly common in CFS construction due to their cost-effectiveness and enhanced load-carrying capacity, making them suitable for longer beam spans and convenient for transportation. These built-up sections are utilized in wall studs, truss components, and floor joists, with intermediate screw fasteners placed at specific intervals to prevent the separate bowing of channels. This study reveals a ratio of 1.003 between experimental findings and finite element analysis results, and 1.002 between experimental findings and direct strength method results, indicating a strong correlation between experimental data from nonlinear finite element analysis and predictions based on the American Iron and Steel Institute and Australian and New Zealand Standards, particularly in predicting the flexural buckling strength of beam specimens. Furthermore, ongoing research is investigating the impact of screw spacing on flexural strength. This study presents results from 175 finite element tests, evaluating seven distinct cross-sections with twelve unique screw spacings. These spacings correspond to the half wavelength of local, distortional, and global buckling, divided by values from one to four. It was found that screw spacing based on half the local buckling half-wavelength along the centerline of the webs increased the critical global buckling moment capacity and the nominal flexural strength by 56 % and 27 %, respectively. For double-lane screws with the same spacing, these increases were even more substantial, reaching 65 % and 31 %, respectively. Economically, the recommended spacing for single-lane screws is half the local buckling half-wavelength.http://www.sciencedirect.com/science/article/pii/S2590123024012180Direct strength method (DSM)Back-to-back channelsBucklingCold-formed steel (CFS)Built-up I-SectionsCritical elastic buckling moment |
| spellingShingle | Ardalan B. Hussein Diyari B. Hussein Structural behavior of built-up I-shaped CFS beams Results in Engineering Direct strength method (DSM) Back-to-back channels Buckling Cold-formed steel (CFS) Built-up I-Sections Critical elastic buckling moment |
| title | Structural behavior of built-up I-shaped CFS beams |
| title_full | Structural behavior of built-up I-shaped CFS beams |
| title_fullStr | Structural behavior of built-up I-shaped CFS beams |
| title_full_unstemmed | Structural behavior of built-up I-shaped CFS beams |
| title_short | Structural behavior of built-up I-shaped CFS beams |
| title_sort | structural behavior of built up i shaped cfs beams |
| topic | Direct strength method (DSM) Back-to-back channels Buckling Cold-formed steel (CFS) Built-up I-Sections Critical elastic buckling moment |
| url | http://www.sciencedirect.com/science/article/pii/S2590123024012180 |
| work_keys_str_mv | AT ardalanbhussein structuralbehaviorofbuiltupishapedcfsbeams AT diyaribhussein structuralbehaviorofbuiltupishapedcfsbeams |