ABSTRACT
To sustain on going social activity, such infra-structures as bridges, dams, tunnels as well as natural civil structures shall be maintained with a proper manner. Recent lowering of infra-investments due to rapid aging of the human population resulting from the decline in the birth rate dwindling tax revenues, makes it an un-trivial task.Accordingly an appropriate allocation program of the budget over the structures to be repaired would be necessarily conducted. Additionally, there are two cases: civil structures are repaired along with monitoring; and those preserve in-service together with monitoring until repair. Acoustic emission monitoring could be applicable for both cases. Real time criticality/stability of structures can be assessed by continuous AE monitoring, while the current damage/integrity of structures can be estimated by short-termAEmonitoring. In the present paper, such two applications ofAEmonitoring are described showing in-situ monitoring of rock and concrete materials.
