Seismic responses of raised lattice domes with substructures are known to be complicated, and not only horizontal response but also vertical response is excited under horizontal seismic input. Such action causes damage on structures and non-structural elements such as ceiling and suspended lightning equipments. A seismic isolation system is
effective to reduce such responses, and will be a solution for safer indoor spaces which are usable for evacuation spaces after large earthquake. In this paper, the effects of seismic isolation bearings on roof response are analytically discussed,
and simple response evaluation methods without time-history analyses are proposed using response amplification factors and linearization techniques. Their validities are also discussed against detailed time history analyses.