To　reduce　the　risk　in　the　integrity　and　safety　of　concrete　composite　structures　(CCS),　a　monitoring　approach　was　developed　by　using　piezoelectric-based　smart　aggregates　(SAs)　and　an　evaluation　method　with　the　damage　extent　(Dc)　of　crack　was　proposed　based　on　the　energy　attenuation　of　stress　wave.　A　two-phase　monitoring　approach　was　presented　firstly,　and　then　two　experiments　and　a　numerical　simulation　were　carried　out　to　validate　the　approach　proposed.　More　specifically,　a　push-out　experiment　was　conducted　with　the　active　sensing　approach　on　the　laminated　interface,　and　the　results　show　that　with　the　increase　of　loading,　the　signal　energy　attenuation　index　(DI)　increases　continuously.　At　the　phase　of　damage　initiation,　there　exists　an　alternative　impact　by　the　crack　length　and　crack　depth,　and　almost　no　slippage　appeared　on　concrete　prisms;　subsequently,　the　crack　width　holds　the　dominant　position　in　the　phase　of　crack　evolution,　and　the　slippage　rises　rapidly;　lastly,　the　components　of　composite　structures　completely　debond　at　the　failure　phase.　In　addition,　based　on　a　combination　of　artificial　cracks　experiment　and　numerical　simulation　analysis,　the　debonding　and　damage　behavior　of　the　laminated　interface　were　figured　out.　A　correlation　equation　of　damage　extent　and　energy　attenuation　index　was　derived.　The　results　show　that　the　proposed　damage　index　can　effectively　detect　the　existence　and　severity　of　crack　on　the　concrete　laminated　interface.　This　indicates　that　the　approach　proposed　is　applicable　to　monitor　the　occurrence　and　evolution　of　crack　damage　and　predict　crack　extent　on　the　laminated　interface.　©　2020　Elsevier　Ltd