The non-linear dynamic design procedure of fluid viscous spring-dampers proposed in the accompanying paper is applied to two
selected case studies, represented by a reinforced concrete and a steel five-storey frame building with identical global dimensions.
The fundamental vibration periods of the two structures in fixed-base conditions, equal to 0.58 s and 1.08 s, respectively, fall within
the range of technical interest for use of base isolation. The reliability of the analytical relationship by which the damping coefficient
is estimated in the preliminary design phase is further verified by comparing its predictions with the loss factor values calculated
from the results of numerical integration of the equations of motion. The final verification phase of the procedure is then developed
with regard to a double design performance objective, for which immediate occupancy and life safety levels are targeted under the
“basic design” and “maximum considered” earthquakes, respectively.
