Use of seismic base isolation systems is increasing significantly for earthquake resistant design of important buildings. However, by placing isolator in between superstructure and substructure, the structure becomes more flexible. As a result, even the structures that are less sensitive to wind excitation (i.e. low-rise buildings), may become more susceptible to wind induced vibration. Therefore, the wind induced response of base-isolated buildings are necessary to examine. Herein, a detailed comparison among the response of base-isolated buildings, isolated using various isolation systems, under wind load is reported. Thereafter, influence of variation in isolation time period, isolation damping ratio, superstructure flexibility and the magnitude of the wind load on the wind induced response are examined. The acceleration at the top floor and the bearing displacement (displacement at isolation level) are considered as the important response quantities. It is observed that elastomeric isolators are capable to reduce the wind induced vibration. It is concluded that increase in the isolation time period increases the top floor acceleration and bearing displacement for all types of isolators. It is also observed that the isolation damping has marginal effects on the bearing displacement. However, some isolation systems show beneficial effect to reduce the top floor acceleration with increasing damping. It is further observed that top floor acceleration is underestimated when the superstructure flexibility is not considered, and influence of the superstructure flexibility is insignificant on the bearing displacement.

Base-Isolated Building; Benchmark; Damping; Earthquake; Gust; Seismic Isolation; Wind.