産業施設に適した建屋免震構造の基礎的研究 : 第3報,免震性能に及ぼすエネルギー吸収装置の影響

概要

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In the case of the earthquake isolation of entire buildings, the performance of isolation for the internal equipment depends on damping characteristics. Three types of isolation systems using lead shear dampers, viscous shear dampers and their combinations of an equivalent capacity were examined to find the most suitable ones for the equipment in industrial facilities. In this study, the dampers generating the same deflexion of rubber bearings to an earthquake input were regarded to have the equivalent capacity. Mathematical analyses were carried out to investigate the performance of the isolation systems, which depended on the main properties of the system (the first natural frequency of the isolated building and the capacity of the dampers) and the input conditions (peak acceleration and dominant frequency of earthquake excitation). The results showed that the viscous shear dampers could not only attenuate the response accelerations of the internal equipment in all ranges of frequency, but also limit the excessive deflexion of rubber bearings more effectively than any other dampers. Consequently, the viscous shear dampers were considered to have the most desirable properties for the earthquake isolation systems suitable for buildings of industrial facilities.
一般社団法人日本機械学会の論文
1987-12-25