Acoustic Emission Characteristics of Bond-Slip for BFRP Concrete at Different Loading Rates

Strain rate effect as an important characteristic of concrete materials, the most research mainly focuses on mechanical properties but less for bond slip behavior. In order to understand the effect of loading rate on the bond slip process. Acoustic emission technology was applied to study damage mechanism for bond-slip behavior of basalt fiber reinforced concrete (BFRC) at different loading rates. The results show that higher loading rate helps to improve bond strength. At the same time, the acoustic emission characteristics have the same tread for BFRC at different loading rate, it mainly affects the activity and intensity magnitude without the distribution. The AE b value were used as the early warning indicator for BFRC were 0.5–1.0. The acoustic emission centroid frequency was an important acoustic emission characteristic parameter that characterizes the loading rate. Those conclusion could be used to evaluate the dynamic damage of BFRC structure.