Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Damaged concrete beam with embedded SSU: (a) Schematic 3D model; (b) FE model; (c) Response spectrum obtained from wave propagation measurements in the actuator–receiver mode; (d) Comparison of received signal between the damaged and no damaged concrete beam with the applied actuation signal.
