Motivated by the past preliminary but encouraging findings, the present work was a subsequent study further aiming to explore the feasibility of using MEH-generated features to indicate specific bridge damage and the sensitivity of these features to the damage. To this end, three cases were studied: one numerical case on pier scouring detection, one laboratory experimental case on girder damage and support malfunction detection of a steel model bridge, and one rarely seen and highly valuable field experimental case on an incrementally damaged steel truss bridge. The MEH used in this study was first briefly introduced in the next section and the three cases were then thoroughly described and discussed in the following section. The vibration responses of the test bridge structures were numerically calculated in the numerical case or measured by sensors in the experimental cases, and then the calculated or measured vibration responses were taken as vibration sources to the MEH to numerically calculate the energy it could harvest. In each case, the harvested energy in a reference state and damage states were compared and discussed. Finally, several findings and concluding remarks were drawn in the last section.