Experimental study of acoustic emission characteristics of underwater concrete structures

摘要

Acoustic emission testing technique is a dynamic testing technology. In this paper, the relationship between the cumulative energy of acoustic emission and lower cycle reversal loads is studied based on results of the experiments on underwater concrete columns, and waveform acoustic emission signal of different destruction states is picked up. Spectrum analysis is carried out, the results of which are compared with those of parametric analysis. The comparison shows that the waveform acoustic emission signal can be used to disclose the characteristics of the concrete materials under loading in real time.