Comparative Experimental and Analytical Modeling of Impact Energy Dissipation of Ultra-High Performance Fibre Reinforced Concrete

다국어 초록 (Multilingual Abstract)

This study examines the impact energy dissipation capacity of Ultra High Performance Fibre Reinforced Concrete (UHPFRC). Forthis purpose, nine different mixes were fabricated with hooked end and crimped steel fibres at a dosage of 0.5, 1.0, 1.5 and 2.0percentage and tested under pendulum impact test. The impact energy dissipation capacity is assessed based on test (Charpy U-notch)procedure suggested by ASTM E23. Also, an analytical model was adopted to predict the impact energy dissipation value ofUHPFRC and its performance is verified against experimental results. Based on the test results, the impact energy dissipationcapacity of the mixtures containing crimped and hooked end steel fibres were significantly higher than that of Plain Concrete (PC).
The hooked end steel fibres had an increased impact energy dissipation capacity compared to crimped steel fibres, which implies thathooked end steel fibre is more appropriate for enhancing the impact energy dissipation of UHPFRC. Also, the modelling datacompared well with experimental data for the fibre volume fraction beyond 0.5%.

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