Online monitoring of cracking in concrete structures using embedded piezoelectric transducers

摘要: Online damage detection is of great interest in the field concrete structures and, more generally, within construction industry. Current economic requirements impose reduction operating costs related to such inspection while security and reliability must constantly be improved. In this paper, nondestructive testing applied using piezoelectric transducers embedded structures. These are especially adapted for online ultrasonic monitoring, due their low cost, small size, broad frequency band. recent called smart aggregates. The technique health monitoring developed study based on a pulse velocity test with an emitter-receiver pair (pitch-catch). indicator focuses early wave arrival. Belgian company MS3 takes evaluating quality around anchorage system highway barriers after important shocks. failure mechanism can viewed as combination bending anchorages. Accordingly, has been both three-points several pull-out tests. results indicate very high sensitivity method, which able detect crack initiation phase follow propagation over entire duration test.