This work presents an analysis of structural health monitoring using the electromechanical impedance method in conjunction with a finite element model. The objective is to implement and evaluate a protection arrangement for piezoelectric transducers, verifying its influence on damage detection. The technique employs piezoelectric transducers embedded in the structure to collect impedance signatures, where changes in the curve indicate possible damage. The signatures are evaluated using specific metrics that allow detecting the presence of damage characterized by displacements in the signatures. The experiment compares a simulated model with a concrete sample subjected to tests under controlled conditions. The results show the correlation between the model values and those observed in the tests, highlighting the efficiency of the applied metrics.