Carbon fiber reinforced polymer (CFRP) laminated concrete structures are used widely in a range of engineering fields because of their many advantages. However they always carry the risk of struc- tural collapse initiated from the debonding conditions that might occur…
Carbon fiber reinforced polymer (CFRP) laminated concrete structures are used widely in a range of engineering fields because of their many advantages. However they always carry the risk of struc- tural collapse initiated from the debonding conditions that might occur between the CFRP and concrete sur- face. This study employed an electro-mechanical impedance-based wireless structural health monitoring (SHM) technique by applying PZT ceramic patches to identify the debonding conditions of a CFRP laminated reinforced concrete beam. In the experimental study, the CFRP-reinforced concrete specimens were fabri- cated and the impedance signals were measured from the wireless impedance sensor node according to the different debonding conditions between the concrete and CFRP. Cross correlation (CC)-based data analysis was conducted to quantify the changes in impedance measured at the PZT patches due to the debonding con- ditions. The results confirmed that an impedance-based wireless SHM technique can be used effectively for monitoring the debonding of CFRP laminated concrete structures.