Abstract
In order to evaluate grouted conditions inside the sheath of post-tensioning prestressed concrete (PC), a procedure named Stack Imaging of spectral amplitudes Based on the Impact-Echo (SIBIE) has been developed. SIBIE is an imaging procedure to display a cross-section of the sheath nondestructively by analyzing elastic waves. The theory and applicability of the procedure are discussed and summarized. It is shown that the results of model specimens, a full-scaled PC girder specimen and an existing PC bridge are in remarkable agreement with actual grouted conditions inside the sheaths. Thus, the applicability of SIBIE to evaluating grouted conditions of PC tendons is confirmed.
