Abstract：To study the dynamic mechanical properties of Aramid Fiber-Reinforced Plastic (AFRP) confined concrete under the impact of repeated dynamic load, using Ф100mm Split Hopkinson pressure bar (SHPB), the dynamic mechanical properties of three kind strength of concrete (C30, C40 and C50) with 1~3 layers AFRP confined was tested in a similar strain rate condition. Through an ultrasonic non-destructive test, damage law of concrete specimens was studied after every impact. The results show that the dynamic peak stress of 1~3 layers AFRP confined concrete is insensitive to the impact cycles, it fluctuating less than 8% shows that AFRP confined concrete is steady; the dynamic peak strain and the damage to inner concrete are increasing with the increased impact frequency, and the damage factor is linear to the impact cycles; AFRP confined concrete remains the shape as a whole test piece when the damage on inner concrete reaches the utmost limit value of common concrete under the same situation. Further more, the AFRP confined concrete test piece remains the ability to withstand next impact.
2013, Vol. 32 
