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Evaluation of Prestressed Concrete Beams based on Acoustic Emission Parameters

Although much research has been conducted on the acoustic emission testing (AE) of concrete structures, few research results are available for prestressed concrete structures. In order to determine a correlation between acoustic emission parameters and the structural integrity of prestressed concrete beams, a 24-sensor monitoring system was used to collect AE data from four prestressed concrete T-beams – one damaged beam and three undamaged beams – which were loaded in cycles up to failure. Acoustic emission parameters of amplitude, duration and signal strength were analyzed for all beams, and relationships were found between these parameters and the damage experienced by the specimens. The results indicate that acoustic emissions parameterbased analysis can be an effective nondestructive tool for damage detection in prestressed concrete beams.

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