Abstract
The research on the bond slip characteristics of BFRP concrete mainly focuses on mechanical properties. There has been no effective technology to study the bond slip damage process of BFRP concrete. Therefore, the characteristics of bond slip failure process of BFRP concrete are studied in this paper based on acoustic emission technology as a real-time dynamic nondestructive monitoring technique. The results show that acoustic emission centroid frequency increased with the slip, the AE count ratio and the AE energy ratio is the largest at the stage of overcoming the chemical bonding force, and then it is significantly reduced and there is a certain increase at the peak of the load. The scatter diagram of the AE duration and the counts is concentrated in on region, likes two rays. Moreover, these phased stable characteristics of acoustic emission characteristics corresponding to different stages of BFRP concrete bond slip process, it provide evidently basis for identifying the process of BFRP concrete bond slip damage based on acoustic emission technology.
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