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Pull-out creep of hooked-end fibre embedded in ultra-high-performance concrete
Highlights Pull-out creep of hooked-end fibre embedded in UHPC is investigated. Role of inclination angle and embedment depth in pull-out creep studied. Creep load applied for 6 months. Residual pull-out strength after 6 months creep investigated.
Abstract If the beneficial effects of fibre reinforcement are to be considered in design of ultra-high performance fibre reinforced concrete (UHPC) structure, an understanding of the long-term creep behaviour is essential. The flexural/ tensile properties of UHPC depend on the individual contribution of discrete fibres that control the overall tensile properties. The creep of UHPC therefore depends on the pull-out creep of individual fibres under sustained load. Very little research has been conducted on single steel fibre pull-out creep. To address this lack of understanding, the impacts of fibre embedment length, fibre embedment angle and sustained load on pull-out creep are investigated in this research. The outcomes of the research show that for hooked-end fibres, a change of embedment length does not significantly influence pull-out creep. The inclination angle (angle between loading axis and fibre-embedded axis) had a significant role in concrete breakage at the loading end (embedded end at loading side) which generally occurred during the application of sustained load. Therefore, the pull-out creep was influenced by the fibre inclination angle for concrete breakage during application of sustained load. Finally, as expected with an increase in load, fibre pull-out creep increased.
Pull-out creep of hooked-end fibre embedded in ultra-high-performance concrete
Highlights Pull-out creep of hooked-end fibre embedded in UHPC is investigated. Role of inclination angle and embedment depth in pull-out creep studied. Creep load applied for 6 months. Residual pull-out strength after 6 months creep investigated.
Abstract If the beneficial effects of fibre reinforcement are to be considered in design of ultra-high performance fibre reinforced concrete (UHPC) structure, an understanding of the long-term creep behaviour is essential. The flexural/ tensile properties of UHPC depend on the individual contribution of discrete fibres that control the overall tensile properties. The creep of UHPC therefore depends on the pull-out creep of individual fibres under sustained load. Very little research has been conducted on single steel fibre pull-out creep. To address this lack of understanding, the impacts of fibre embedment length, fibre embedment angle and sustained load on pull-out creep are investigated in this research. The outcomes of the research show that for hooked-end fibres, a change of embedment length does not significantly influence pull-out creep. The inclination angle (angle between loading axis and fibre-embedded axis) had a significant role in concrete breakage at the loading end (embedded end at loading side) which generally occurred during the application of sustained load. Therefore, the pull-out creep was influenced by the fibre inclination angle for concrete breakage during application of sustained load. Finally, as expected with an increase in load, fibre pull-out creep increased.
Pull-out creep of hooked-end fibre embedded in ultra-high-performance concrete
Bashar, Iftekhair Ibnul (author) / Sturm, Alexander Bonaparte (author) / Visintin, Phillip (author) / Sheikh, Abdul Hamid (author)
2022-12-20
Article (Journal)
Electronic Resource
English
MODELLING HOOKED STEEL FIBRE PULL-OUT IN FIBRE-REINFORCED HIGH-STRENGTH CONCRETE
| British Library Conference Proceedings | 2006
| Springer Verlag | 2017
Mechanical analyses of hooked fiber pullout performance in ultra-high-performance concrete
| Online Contents | 2014
Mechanical analyses of hooked fiber pullout performance in ultra-high-performance concrete
| British Library Online Contents | 2014