Contribution of elastic wave approaches to civil engineering digital transformation

Abstract

As for DX for civil infrastructures, digital twin of point-clouds of spillway of a rock fill dam is demonstrated. Reproduction of existing structures with point-clouds from still or movie images are shown. Necessary information in addition to the point-clouds such as surface and internal condition of the structure are depicted. As for the diagnosis methods for internal condition, brief history with elastic wave approaches is reviewed. Information such as surface deterioration condition as well as internal condition composed of elastic wave velocities, which will be crucially important to realize life-cycle-oriented design, construction, and maintenance, is incorporated into the digital twin. Through the suggested model, overall damage of the spillway is discussed in combination with the pin-point excavations for the verification. Through the life cycle of the civil engineering structures roles of elastic wave approaches including AE techniques will be suggestively indicated.