MULTI-CRITERIA DECISION MAKING TO IMPROVE THE PERFORMANCE OF BASE ISOLATION RUBBER BEARING

Seismic isolation is used to minimize damage and prevent collapse in earthquakes. This research aims to study Multi Criteria Optimization of rubber bearing. A numerical model is proposed using FE simulation implemented in ABAQUS 6.11. Effect of parameters like number of rubber layers, thickness of steel shim, and shear modulus of rubber, on operational characteristics is investigated. Operational characteristics are effective horizontal stiffness, vertical stiffness, and equivalent viscous damping. Results show that number of rubber layers and thickness of steel shim have large effects on vertical stiffness. Furthermore, horizontal stiffness and equivalent viscous damping are highly dependent on shear modulus.