ABSTRACT
Seismic isolation and supplemental damping are passive protection strategies for reducing the seismic demand on structural elements. They are commonly used in retrofit applications, where the existing structure cannot be relied upon to resist a design earthquake ground motion in a ductile manner, and other interventions may be difficult or infeasible to carry out. Isolation is also very common in bridge applications, where the connection between pier and deck presents a natural and effective interface to allow relative movement.
