Abstract
The ultrasonic testing that is one of non-destructive method is applied to evaluate the quality of concrete structure or to determine its crack depth. However, it is clarified neither how the ultrasonic waves propagate in concrete, nor what kind of influences of boundary conditions and initial state on ultrasonic waves. In this study, therefore, not only experimental tests but also analytical examinations are carried so as to clarify the propagation of the ultrasonic wave in concrete with a crack and to aim the extension of the application range and the reliability improvement of the ultrasonic wave method as the quality-evaluation technique of concrete. From this study, the propagation of ultrasonic wave in the concrete was visualized, and the propagation of ultrasonic wave in concrete was clarified by the distributions of displacement.
