Repozytorium publikacji - Politechnika Gdańska

The article presents the results of the numerical and experimental analysis concerning wave propagation in reinforced concrete (RC) beams with various extent of debonding between the steel rod and concrete cover. The main aim of the paper was to consider the unsolved research gaps, which considerably limit the application of wave-based methods in practice. The propagation of the flexural wave modes excited and registered on the outer surface of the concrete cover in RC beams with various damage sizes were considered. The phenomenon of flexural wave propagation in a damaged beam was described theoretically and the relationship between damage size and wave velocity was proposed. Next, the theoretical predictions were examined experimentally. The research allows to observe the variability of the velocity of a wave propagating in various regions of the monitored specimen. The differences between times of flight allow to determine the localization of the debonded rod. The study indicates that the debonding size can be successfully determined if the velocities of flexural wave modes in the concrete specimen as well as in separated reinforcing rod are known.

Autorzy

• dr hab. inż. Beata Zima link otwiera się w nowej karcie ,
• Rafał Kędra