Abstract:
In this study, the state of the art of modal parameters-shift-based damage identification is advanced by incorporating a tunable piezoelectric actuator into the structure to enrich the modal parameters measurements, meanwhile implementing an identification algorithm to sufficiently utilize the enriched information. By integrating tunable piezoelectric actuators into the structure, we can introduce additional resonant peaks into the system dynamic response in the frequency domain, and these additional peaks can be adjusted over the frequency band by tuning the actuator. Clearly, a significantly increased amount of modal parameters shift information can be expected to reflect the damage effect. A series of analyses using a reinforced concrete (RC) wall and a RC column integrated with a tunable piezoelectric actuator is carried out to demonstrate this proposed methodology and verify the performance. The results indicate that piezoelectric actuator has high potential applicability to damage assessment of concrete structures.
