ABSTRACT
Seismic isolation and vibration-control systems are relatively new and sophisticated concepts that require
more extensive design and detailed analysis than do most conventional seismic designs of structures.
In general, these systems will be most applicable to structures whose designers seek superior
earthquake performance. Seismic base isolation and passive energy-dissipation systems are viable design
strategies that have already been used for seismic protection of a number of structures. Other special
seismic protective system techniques such as active control, semiactive control, hybrid combinations of
active and passive devices, and tuned mass and liquid dampers may also provide practical solutions in the
near future. An innovative challenge is highly expected in this field for the seismic safety enhancement of
civil structures.
