Abstract
Taking acoustic emission (AE) parameters as the cut-in point, AE experiments were carried out for three-point bending beams with notch, the basic features of AE parameters were studied for the fracture process of concrete and reinforced concrete with different strength grades and different reinforcement ratios, through ringing counts rate and time curve, accumulative ringing counts and time curve, energy and time curve, accumulate energy and time curve, et al. The research result shows that the initial loads and the maximum loads of concrete three-point bending beams can be determined more accurately, by the reciprocal combination of ringing counts and energy curves. The AE parameters of concrete and reinforced concrete three-point bending beams are influenced by the initial design strength. As the reinforcement ratio changes, the fracture processes of reinforced concrete are different, and the corresponding AE signals are also different. The results of this work will provide the experimental basis to further study the fracture process of concrete.
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