Structural control technology has been widely accepted as an effective means for the protection of structures against seismic hazards. Passive base isolation is one of the common structural control techniques used to enhance the performance of structures subjected to severe earthquake excitations. Isolation bearings employed at the base of a structure naturally increase its flexibility, but con...

Seismic isolation is at the present time in a very active state ofdevelopment. Many new types of isolation systems are being exploredand elastomeric isolators, the system which has been employed onalmost all isolation systems completed to date, continue to undergoimprovement. At least one dozen large projects, either new or theretrofit of existing buildings, have been comple...

In this study, control performance of a smart base isolation system consisting of a friction pendulum system (FPS) and a magnetorheological (MR) damper has been investigated. A fuzzy logic controller (FLC) is used to modulate the MR damper so as to minimize structural acceleration while maintaining acceptable base displacement levels. To this end, a multi-objective optimization scheme is used t...