2024 Volume 80 Issue 13 Article ID: 23-13112
Dynamic vibrations are generated in road bridges due to steady actions such as traffic vibration, wind, and constant ground tremors, as well as unsteady actions such as earthquakes. Among them, steady-state effects act on road bridges even during earthquakes. In order to analyze vibration characteristics in detail, we need to clarify the influence of steady-state effects. In this study, we calculated the time-series changes in vibration characteristics using continuous acceleration records observed over a period of one month using a strong motion monitoring system, and analyzed the relationship with external factors. We focused on external factors such as traffic volume, temperature, and wind, and determined the correlation with time-series changes in vibration characteristics at each observation point. Furthermore, we showed the difference between a road bridge during an earthquake and at normal times based on the time-series changes in vibration characteristics.
