Abstract
In recent years, the accelerated corrosion of steel sheet pile in an agricultural canal has been problems. Prior to reconstruction and retrofit of these structures, renewal method of in-situ structure is now in urgent issue. In this study, development of nondestructive evaluation method for quantitative evaluation of crack characteristics on repair concrete member of agricultural canal is going to be performed, applying steel sheet pile-concrete composite. Quantitative damage nondestructive evaluation method is proposed by applying infrared thermography method and the semi-variogram analysis of spatial-statistics. The semi-variogram analysis is a quantitative evaluation method of the spatial distribution of physical properties. In the experiments, the damaged composite canal wall is examined. The semi-variogram appeared different semi-variance characteristics depending on the damage level. Thus, the damage level of concrete surface layer could be quantitatively evaluated by the semi-variogram analysis using infrared image.
