ABSTRACT
This paper reveals the characteristics of laser ablation-excited vibrations in concrete through laboratory experiments by comparing the frequency response function obtained from hammer-induced vibration. The results show that the characteristics of laser-excited vibration are not flat, and high-frequency vibration is more strongly excited. This is because the excitation source of the laser ablation-excited vibration is not the reaction force of material removal from the concrete surface but the sound pressure excited by laser ablation. Therefore, it is necessary to consider these vibration characteristics and the vibration excitation source when the laser ablation is used as a substitute for a hammer.
