RESPONSE EVALUATION OF LATTICE DOMES SUPPORTED BY ELASTO-PLASTIC SUBSTRUCTURES

Abstract

Seismic responses of lattice domes with substructures are known to be very complicated, because of the dome having large numbers of parallel vibration modes, whose amplitude changes drastically along the stiffness of substructures. Also they are required plastic desigh for ultimate state desigh in heavy seismic areas. In this paper, simple response evaluation method of domes supported by elasto-plastic substructure are proposed using response amplification factors and linearization techniques. Their validities are disucussed against response spectrum analyses with CQC method and time history analyses.