Experimental and seismic analysis of a novel ring spring vertical isolation bearing with central ring

Recent seismic observations highlight the critical impact of vertical seismic actions on structural safety, especially in high-seismicity regions and near-fault zones, emphasizing the need for effective vertical isolation. However, current vertical isolation devices often face limitations in load-bearing capacity and energy dissipation. To address these challenges, this study introduces an innovative Ring Spring Vertical Isolation Bearing with Central Ring (RSVIB with CR) designed to enhance load capacity and energy dissipation performance. This study conducted a comprehensive investigation through theoretical modeling, experimental testing, and seismic response analysis. A mechanical model was developed to characterize the RSVIB with CR' s behavior during loading and unloading phases, with static compression tests validating the model and assessing energy dissipation.Parameter analysis revealed the influence of key geometric factors on stiffness and ultimate load capacity. Seismic response analysis demonstrated that the RSVIB with CR effectively reduces vertical peak accelerations and vibration amplitudes under diverse seismic inputs. Furthermore, its pronounced hysteresis behavior under large displacements highlights exceptional energy dissipation capacity, ensuring adaptability to intense seismic conditions. These findings establish the RSVIB with CR as an innovative and efficient solution for vertical isolation, enhancing seismic resilience in high-seismicity environments.