The Failure Mechanism of CFRP Reinforced RC Beam under Impact Loads

Abstract

The influence of carbon fiber reinforced plastic (CFRP) on dynamic mechanical properties of reinforced concrete (RC) beam was studied by drop hammer impact test system. The impact behaviors of beam, including failure mode, impact force peak value and peak deflection were analyzed. The experimental results show that bonding CFRP can reduce the crack width and change the failure mode of the beam. The length of CFRP has a certain influence on the impact force and deflection, and the peak inertia force of most beams is roughly in the range of 1/2-5/6 of the peak impact force. In addition, dynamic increase factor (DIF) increases with the increase of CFRP length, and its maximum value can reach 2.11.

Keywords

CFRP / RC beam / failure mode / impact resistance / DIF

References

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