Abstract
This chapter describes the application of acoustic emission (AE) techniques to monitor structural integrity of reinforced concrete (RC) beams strengthened in flexure with carbon fiber reinforced polymer (CFRP) sheets. The objective is to initiate the creation of a user-friendly health monitoring system for RC structures strengthened with CFRP sheets using AE techniques. The collected test results by AE were analyzed for four levels of damage based on initial crack, propagation, yielding of main bars, and fracture or rip-off of the CFRP sheets. The signal characteristics obtained by AE: event, amplitude versus frequency, and amplitude versus duration show clear differences in the different level of damage corresponding to the load.
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