2024 Volume 80 Issue 13 Article ID: 23-13138
Recently, spherical sliding bearings have attracted attention as a new seismic isolation bearing mechanism that differs from conventional laminated rubber bearings. When a spherical sliding bearing is applied to existing bridges as a seismic retrofit, it is necessary to consider the effect of different ground type by modeling the structure including the ground. In this study, nonlinear dynamic analyses were conducted on bridge models with spherical sliding bearings and different ground type in order to investigate the effects of different ground type on the dynamic response of existing bridges seismically retrofitted by spherical sliding bearings. The results showed that the dynamic response of the model was affected by ground type, and that the difference in response values was small when solid ground, which suggests that solid ground could be preferable when spherical sliding bearings are applied to existing bridges as seismic reinforcement.
