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Modelling the Time-Dependent Pull-Out Behaviour of Hooked Steel Fibres
Steel Fibre Reinforced Concrete (SFRC) is currently being used as a structural material even though little is known about the creep behaviour of SFRC, specially the cracked tensile creep. In recent studies it has been revealed that even though the tensile creep of SFRC is similar to that of ordinary concrete, the creep increased significantly after the SFRC had cracked. This phenomenon can be associated with time-dependent crack widening that is caused by fibre pull-out over time. Single fibre pull-out rate and sustained load tests were performed to investigate the time-dependent pull-out behaviour of hooked-end steel fibres. Four pull-out rates ranging from 2.5 mm/s to 0.00025 mm/s were considered. The sustained load varied from 30 % to 85 % of the maximum (short term) pull-out resistance. Finally, an analytical study was conducted to predict the time-dependent pull-out behaviour.
Modelling the Time-Dependent Pull-Out Behaviour of Hooked Steel Fibres
Steel Fibre Reinforced Concrete (SFRC) is currently being used as a structural material even though little is known about the creep behaviour of SFRC, specially the cracked tensile creep. In recent studies it has been revealed that even though the tensile creep of SFRC is similar to that of ordinary concrete, the creep increased significantly after the SFRC had cracked. This phenomenon can be associated with time-dependent crack widening that is caused by fibre pull-out over time. Single fibre pull-out rate and sustained load tests were performed to investigate the time-dependent pull-out behaviour of hooked-end steel fibres. Four pull-out rates ranging from 2.5 mm/s to 0.00025 mm/s were considered. The sustained load varied from 30 % to 85 % of the maximum (short term) pull-out resistance. Finally, an analytical study was conducted to predict the time-dependent pull-out behaviour.
Modelling the Time-Dependent Pull-Out Behaviour of Hooked Steel Fibres
Nieuwoudt, P. D. (author) / Boshoff, W. P. (author)
10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures ; 2015 ; Vienna, Austria
CONCREEP 10 ; 1485-1494
2015-09-18
Conference paper
Electronic Resource
English
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