Performance and Material Characteristics of 30 years Use Laminated Rubber Bearings for Seismic Isolation of Buildings

Abstract

Performance of laminated natural rubber bearing used for 30 years in seismic isolation building was evaluated. Horizontal stiffness increased by 14.6% and vertical stiffness increased by 5.9% for 30 years. It was confirmed from rubber physical property tests that change in physical properties with age remained within a limited range from the surface of the laminated rubber bearing. Moreover, these results were compared with other research results, and the validity of the rate of change in performance of laminated rubber bearing was verified.