Global buckling and residual capacities of circular recycled aggregate concrete-filled stainless steel tube (RACFSST) columns after exposure to fire
The post-fire flexural buckling behaviour and capacities of circular recycled aggregate concrete-filled stainless steel tube (RACFSST) columns are studied in this paper, underpinned by testing and numerical modelling. A testing programme was firstly conducted on twelve column specimens designed with...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2025
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| Online Access: | https://hdl.handle.net/10356/182496 |
| _version_ | 1826112514475163648 |
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| author | Wang, Ziyi Zhong, Yukai Liang, Yating Zhao, Ou |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Wang, Ziyi Zhong, Yukai Liang, Yating Zhao, Ou |
| author_sort | Wang, Ziyi |
| collection | NTU |
| description | The post-fire flexural buckling behaviour and capacities of circular recycled aggregate concrete-filled stainless steel tube (RACFSST) columns are studied in this paper, underpinned by testing and numerical modelling. A testing programme was firstly conducted on twelve column specimens designed with three recycled coarse aggregate replacement ratios (0%, 35% and 70%), including nine column specimens after exposure to the ISO 834 standard fire for 15 min, 30 min and 45 min and three reference column specimens at ambient temperature. The test failure modes, load–mid-height lateral deflection curves and failure loads were reported in detail. The influences of heating durations and recycled coarse aggregate replacement ratios on failure loads and mid-height lateral deflections at failure loads of circular RACFSST column specimens were discussed and their lateral deflection distributions were analysed. The testing programme was followed by a numerical modelling programme, where thermal and mechanical finite element models were developed to repeat the experimental results and afterwards used to carry out parametric studies to generate a numerical data pool over a wide range of cross-section dimensions and member lengths. Based on the test and numerical data, the relevant design rules for circular natural aggregate concrete-filled carbon steel tube columns at ambient temperature, as specified in the European code, Australian/New Zealand standard and American specification, were evaluated, using post-fire material properties, for their applicability to circular RACFSST columns after exposure to fire. It was revealed from the evaluation results that the three design codes led to overall acceptable levels of accuracy and consistency in predicting post-fire flexural buckling capacities of circular RACFSST columns, but with some unsafe predictions. |
| first_indexed | 2025-03-09T10:36:43Z |
| format | Journal Article |
| id | ntu-10356/182496 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-03-09T10:36:43Z |
| publishDate | 2025 |
| record_format | dspace |
| spelling | ntu-10356/1824962025-02-05T01:13:12Z Global buckling and residual capacities of circular recycled aggregate concrete-filled stainless steel tube (RACFSST) columns after exposure to fire Wang, Ziyi Zhong, Yukai Liang, Yating Zhao, Ou School of Civil and Environmental Engineering Engineering Circular recycled aggregate concrete-filled stainless steel tube columns Design analyses The post-fire flexural buckling behaviour and capacities of circular recycled aggregate concrete-filled stainless steel tube (RACFSST) columns are studied in this paper, underpinned by testing and numerical modelling. A testing programme was firstly conducted on twelve column specimens designed with three recycled coarse aggregate replacement ratios (0%, 35% and 70%), including nine column specimens after exposure to the ISO 834 standard fire for 15 min, 30 min and 45 min and three reference column specimens at ambient temperature. The test failure modes, load–mid-height lateral deflection curves and failure loads were reported in detail. The influences of heating durations and recycled coarse aggregate replacement ratios on failure loads and mid-height lateral deflections at failure loads of circular RACFSST column specimens were discussed and their lateral deflection distributions were analysed. The testing programme was followed by a numerical modelling programme, where thermal and mechanical finite element models were developed to repeat the experimental results and afterwards used to carry out parametric studies to generate a numerical data pool over a wide range of cross-section dimensions and member lengths. Based on the test and numerical data, the relevant design rules for circular natural aggregate concrete-filled carbon steel tube columns at ambient temperature, as specified in the European code, Australian/New Zealand standard and American specification, were evaluated, using post-fire material properties, for their applicability to circular RACFSST columns after exposure to fire. It was revealed from the evaluation results that the three design codes led to overall acceptable levels of accuracy and consistency in predicting post-fire flexural buckling capacities of circular RACFSST columns, but with some unsafe predictions. Ministry of Education (MOE) The authors would like to thank the Singapore Ministry of Education Academic Research Fund (AcRF) Tier 1 Grant (Award Number: RG122/21) for the financial support and Pan-United Corporation Ltd for sponsoring the recycled coarse aggregates used in the research work. 2025-02-05T01:13:11Z 2025-02-05T01:13:11Z 2025 Journal Article Wang, Z., Zhong, Y., Liang, Y. & Zhao, O. (2025). Global buckling and residual capacities of circular recycled aggregate concrete-filled stainless steel tube (RACFSST) columns after exposure to fire. Engineering Structures, 322, 119166-. https://dx.doi.org/10.1016/j.engstruct.2024.119166 0141-0296 https://hdl.handle.net/10356/182496 10.1016/j.engstruct.2024.119166 2-s2.0-85207327313 322 119166 en RG122/21 Engineering Structures © 2024 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies. |
| spellingShingle | Engineering Circular recycled aggregate concrete-filled stainless steel tube columns Design analyses Wang, Ziyi Zhong, Yukai Liang, Yating Zhao, Ou Global buckling and residual capacities of circular recycled aggregate concrete-filled stainless steel tube (RACFSST) columns after exposure to fire |
| title | Global buckling and residual capacities of circular recycled aggregate concrete-filled stainless steel tube (RACFSST) columns after exposure to fire |
| title_full | Global buckling and residual capacities of circular recycled aggregate concrete-filled stainless steel tube (RACFSST) columns after exposure to fire |
| title_fullStr | Global buckling and residual capacities of circular recycled aggregate concrete-filled stainless steel tube (RACFSST) columns after exposure to fire |
| title_full_unstemmed | Global buckling and residual capacities of circular recycled aggregate concrete-filled stainless steel tube (RACFSST) columns after exposure to fire |
| title_short | Global buckling and residual capacities of circular recycled aggregate concrete-filled stainless steel tube (RACFSST) columns after exposure to fire |
| title_sort | global buckling and residual capacities of circular recycled aggregate concrete filled stainless steel tube racfsst columns after exposure to fire |
| topic | Engineering Circular recycled aggregate concrete-filled stainless steel tube columns Design analyses |
| url | https://hdl.handle.net/10356/182496 |
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