Abstract
Hysteretic devices are essential for base-isolated buildings to control the deformation in the isolation system and to dissipate the earthquake-induced energy. U-shaped steel dampers dissipate energy through plastic deformation of specially designed steel elements. This paper investigates the performance of U-shaped steel dampers for the seismic isolation system as well as comparison with lead rubber bearings. For this purpose, both isolators are attached to a 5-storey building. Nonlinear time history analysis is carried out for four different earthquake ground motions. The results show that the response quantities are significantly reduced; therefore structural damages are minimized in both isolation systems.
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