Comparative impact behaviours of ultra high performance concrete columns reinforced with polypropylene vs steel fibres
Polypropylene (PP) fibres have primarily used to control shrinkage cracks or mitigate explosive spalling in concrete structures exposed to fire or subjected to impact/blast loads, with limited investigations on capacity improvement. This study unveils the possibility of using PP micro-fibres to impr...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Journal Article |
| Published: |
2024
|
| Online Access: | http://purl.org/au-research/grants/arc/DP220100307 http://hdl.handle.net/20.500.11937/96040 |
| _version_ | 1848766080392101888 |
|---|---|
| author | Pham, Thong Hyde, H. Kaung, M.K. Zhuge, Y. Tran, Duong Vlietstra, D. Tran, T.M. |
| author_facet | Pham, Thong Hyde, H. Kaung, M.K. Zhuge, Y. Tran, Duong Vlietstra, D. Tran, T.M. |
| author_sort | Pham, Thong |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Polypropylene (PP) fibres have primarily used to control shrinkage cracks or mitigate explosive spalling in concrete structures exposed to fire or subjected to impact/blast loads, with limited investigations on capacity improvement. This study unveils the possibility of using PP micro-fibres to improve the impact behaviour of fibre-reinforced ultra-high-performance concrete (FRUHPC) columns. Results show that the addition of fibres significantly improves the impact behaviour of FRUHPC columns by shifting the failure mechanism from brittle shear to favourable flexural failure. The addition of steel or PP fibres affected the impact responses differently. Steel fibres considerably increased the peak impact force (up to 18%) while PP micro-fibres slightly increased the peak (3%–4%). FRUHPC significantly reduced the maximum mid-height displacement by up to 30% (under 20° impact) and substantially improved the displacement recovery by up to 100% (under 20° impact). FRUHPC with steel fibres significantly improved the energy absorption while those with PP micro-fibres reduced the energy absorption, which is different from the effect of PP-macro fibre reported in the literature. The optimal fibre content for micro-PP fibres is 1% due to its minimal fibre usage and low peak and residual displacement. This study highlights the potential of FRUHPC as a promising material for impact-resistant structures by creating a more favourable flexural failure mechanism, enhancing ductility and toughness under impact loading, and advancing the understanding of the role of fibres in structural performance. |
| first_indexed | 2025-11-14T11:45:27Z |
| format | Journal Article |
| id | curtin-20.500.11937-96040 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:45:27Z |
| publishDate | 2024 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-960402024-11-07T00:40:44Z Comparative impact behaviours of ultra high performance concrete columns reinforced with polypropylene vs steel fibres Pham, Thong Hyde, H. Kaung, M.K. Zhuge, Y. Tran, Duong Vlietstra, D. Tran, T.M. Polypropylene (PP) fibres have primarily used to control shrinkage cracks or mitigate explosive spalling in concrete structures exposed to fire or subjected to impact/blast loads, with limited investigations on capacity improvement. This study unveils the possibility of using PP micro-fibres to improve the impact behaviour of fibre-reinforced ultra-high-performance concrete (FRUHPC) columns. Results show that the addition of fibres significantly improves the impact behaviour of FRUHPC columns by shifting the failure mechanism from brittle shear to favourable flexural failure. The addition of steel or PP fibres affected the impact responses differently. Steel fibres considerably increased the peak impact force (up to 18%) while PP micro-fibres slightly increased the peak (3%–4%). FRUHPC significantly reduced the maximum mid-height displacement by up to 30% (under 20° impact) and substantially improved the displacement recovery by up to 100% (under 20° impact). FRUHPC with steel fibres significantly improved the energy absorption while those with PP micro-fibres reduced the energy absorption, which is different from the effect of PP-macro fibre reported in the literature. The optimal fibre content for micro-PP fibres is 1% due to its minimal fibre usage and low peak and residual displacement. This study highlights the potential of FRUHPC as a promising material for impact-resistant structures by creating a more favourable flexural failure mechanism, enhancing ductility and toughness under impact loading, and advancing the understanding of the role of fibres in structural performance. 2024 Journal Article http://hdl.handle.net/20.500.11937/96040 10.1016/j.dt.2024.04.016 http://purl.org/au-research/grants/arc/DP220100307 https://creativecommons.org/licenses/by-nc-nd/4.0/ fulltext |
| spellingShingle | Pham, Thong Hyde, H. Kaung, M.K. Zhuge, Y. Tran, Duong Vlietstra, D. Tran, T.M. Comparative impact behaviours of ultra high performance concrete columns reinforced with polypropylene vs steel fibres |
| title | Comparative impact behaviours of ultra high performance concrete columns reinforced with polypropylene vs steel fibres |
| title_full | Comparative impact behaviours of ultra high performance concrete columns reinforced with polypropylene vs steel fibres |
| title_fullStr | Comparative impact behaviours of ultra high performance concrete columns reinforced with polypropylene vs steel fibres |
| title_full_unstemmed | Comparative impact behaviours of ultra high performance concrete columns reinforced with polypropylene vs steel fibres |
| title_short | Comparative impact behaviours of ultra high performance concrete columns reinforced with polypropylene vs steel fibres |
| title_sort | comparative impact behaviours of ultra high performance concrete columns reinforced with polypropylene vs steel fibres |
| url | http://purl.org/au-research/grants/arc/DP220100307 http://hdl.handle.net/20.500.11937/96040 |