Akari Shimoda, Kouichi Takeya, Yuichi Ito, Eiichi Sasaki

Abstract: For bridge inspection, non-destructive testing has proven effective in capturing changes in vibration characteristics such as natural frequencies and damping ratios. However, these vibration parameters are known to vary due to external factors beyond bridge deterioration. This study investigates the influence of various conditions on the natural frequencies and damping of a target bridge. Excitation tests were conducted under various conditions, including the use of a shaker mounted onto a moving vehicle. The resonance phenomenon between vehicle and bridge was analyzed to identify the natural frequencies of the target bridge. The proposed mobile shaker system has demonstrated potential for efficient and accurate vibration-based bridge monitoring.

Keywords: Excitation test, Natural frequency, Damping, Shaker, Excitation level, Temperature, Moving vehicle.

Date Published: December 23, 2025
DOI: 10.11159/ijci.2025.025

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