Post-fire flexural buckling and resistances of square recycled aggregate concrete-filled stainless steel tube (RACFSST) columns
The flexural buckling behaviour and residual resistances of square recycled aggregate concrete-filled stainless steel tube (RACFSST) columns after exposure to fire are studied in this paper, based on experiments and numerical modelling. Twelve column specimens, fabricated from concretes with three r...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/182497 |
| _version_ | 1826124202099343360 |
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| author | Wang, Ziyi Zhong, Yukai Su, Andi Su, Meini Zhao, Ou |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Wang, Ziyi Zhong, Yukai Su, Andi Su, Meini Zhao, Ou |
| author_sort | Wang, Ziyi |
| collection | NTU |
| description | The flexural buckling behaviour and residual resistances of square recycled aggregate concrete-filled stainless steel tube (RACFSST) columns after exposure to fire are studied in this paper, based on experiments and numerical modelling. Twelve column specimens, fabricated from concretes with three recycled coarse aggregate replacement ratios (0%, 35% and 70%), were tested after exposure to the ISO 834 standard fire for 0 min (i.e. at ambient temperature), 15 min, 30 min and 45 min. The experimental investigation included heating of specimens, cylinder tests as well as post-fire initial global geometric imperfection measurements, tensile coupon tests and pin-ended column tests. The test setups, procedures and results were fully reported and the ductility indices, lateral deflection distributions and longitudinal strains were discussed and analysed. A numerical investigation was afterwards carried out, where the test results were used to validate thermal and mechanical finite element models; upon validation, parametric studies were conducted to expand the test data bank over a wider range of cross-section dimensions and member lengths. On the basis of the test and numerical data, the relevant design rules for square natural aggregate concrete-filled carbon steel tube columns at ambient temperature, as set out in the European code, Australian/New Zealand standard and American specification, were assessed, using post-fire material properties, for their applicability to square RACFSST columns after exposure to fire. It was found from the assessment results that the three design codes resulted in overall accurate and consistent post-fire flexural buckling resistance predictions but some were unsafe. |
| first_indexed | 2025-03-09T13:42:30Z |
| format | Journal Article |
| id | ntu-10356/182497 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-03-09T13:42:30Z |
| publishDate | 2025 |
| record_format | dspace |
| spelling | ntu-10356/1824972025-02-05T01:28:35Z Post-fire flexural buckling and resistances of square recycled aggregate concrete-filled stainless steel tube (RACFSST) columns Wang, Ziyi Zhong, Yukai Su, Andi Su, Meini Zhao, Ou School of Civil and Environmental Engineering Engineering Pin-ended column tests Post-fire flexural buckling resistances The flexural buckling behaviour and residual resistances of square recycled aggregate concrete-filled stainless steel tube (RACFSST) columns after exposure to fire are studied in this paper, based on experiments and numerical modelling. Twelve column specimens, fabricated from concretes with three recycled coarse aggregate replacement ratios (0%, 35% and 70%), were tested after exposure to the ISO 834 standard fire for 0 min (i.e. at ambient temperature), 15 min, 30 min and 45 min. The experimental investigation included heating of specimens, cylinder tests as well as post-fire initial global geometric imperfection measurements, tensile coupon tests and pin-ended column tests. The test setups, procedures and results were fully reported and the ductility indices, lateral deflection distributions and longitudinal strains were discussed and analysed. A numerical investigation was afterwards carried out, where the test results were used to validate thermal and mechanical finite element models; upon validation, parametric studies were conducted to expand the test data bank over a wider range of cross-section dimensions and member lengths. On the basis of the test and numerical data, the relevant design rules for square natural aggregate concrete-filled carbon steel tube columns at ambient temperature, as set out in the European code, Australian/New Zealand standard and American specification, were assessed, using post-fire material properties, for their applicability to square RACFSST columns after exposure to fire. It was found from the assessment results that the three design codes resulted in overall accurate and consistent post-fire flexural buckling resistance predictions but some were unsafe. Ministry of Education (MOE) The research work presented in this paper receives financial supports from the Singapore Ministry of Education Academic Research Fund (AcRF) Tier 1 Grant (award number: RG122/21). The recycled coarse aggregates used in the present research were sponsored by Pan-United Corporation Ltd. 2025-02-05T01:28:35Z 2025-02-05T01:28:35Z 2024 Journal Article Wang, Z., Zhong, Y., Su, A., Su, M. & Zhao, O. (2024). Post-fire flexural buckling and resistances of square recycled aggregate concrete-filled stainless steel tube (RACFSST) columns. Thin-Walled Structures, 205, 112490-. https://dx.doi.org/10.1016/j.tws.2024.112490 0263-8231 https://hdl.handle.net/10356/182497 10.1016/j.tws.2024.112490 2-s2.0-85205425335 205 112490 en RG122/21 Thin-Walled Structures © 2024 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies. |
| spellingShingle | Engineering Pin-ended column tests Post-fire flexural buckling resistances Wang, Ziyi Zhong, Yukai Su, Andi Su, Meini Zhao, Ou Post-fire flexural buckling and resistances of square recycled aggregate concrete-filled stainless steel tube (RACFSST) columns |
| title | Post-fire flexural buckling and resistances of square recycled aggregate concrete-filled stainless steel tube (RACFSST) columns |
| title_full | Post-fire flexural buckling and resistances of square recycled aggregate concrete-filled stainless steel tube (RACFSST) columns |
| title_fullStr | Post-fire flexural buckling and resistances of square recycled aggregate concrete-filled stainless steel tube (RACFSST) columns |
| title_full_unstemmed | Post-fire flexural buckling and resistances of square recycled aggregate concrete-filled stainless steel tube (RACFSST) columns |
| title_short | Post-fire flexural buckling and resistances of square recycled aggregate concrete-filled stainless steel tube (RACFSST) columns |
| title_sort | post fire flexural buckling and resistances of square recycled aggregate concrete filled stainless steel tube racfsst columns |
| topic | Engineering Pin-ended column tests Post-fire flexural buckling resistances |
| url | https://hdl.handle.net/10356/182497 |
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