EVALUATION METHOD FOR GROUTING CONDITION IN PC MEMBERS BASED ON ELASTIC WAVEFORM CHARACTERISTICS

Abstract

This paper describes the validity of parameters obtained from received waveform in Impact Elastic-Wave Methods for the evaluation of grouting condition in PC structure. In this study, both experimental and FEM analysis investigation was conducted. In experiment, relation between the propagation velocity, the frequency distribution and the risetime obtained from received waveforms and volume percentage of grout or difference of component material used in specimen. FEM analysis was carried out to understand the elastic wave behavior inside the specimen, which was visually identified. Finally, experiments of a real PC tank were carried out to confirm the practical applicability of this method.