抄録
A series of prestressed concrete beams were loaded in three points bending until failure. The waveform acoustic emission signals were recorded. Crack initiation and propagation due to bending were monitored and compared with observation. Based on the relationship between the cumulative energy of acoustic emission and time, the waveform acoustic emission signals were analyzed and disposed by using Gabor wavelet. The research shows that the AE signals of the different damage levels of prestressed concrete beams have the different characteristics in time-frequency domain. The research results will provide some helpful enlightenment for on-line and real-time health monitoring of prestressed concrete structures.
