大規模上下動制震床システムの研究(一般講演)

概要

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A large-scaled seismic isolation floor system has been developed in order to reduce a vertical response motion of large span and cantilever structures. The seismic isolation floor system is applied to the 40m cantilever of an actual exhibition building. The preliminary analytical survey and laboratory tests show that the system including air spring (0.8Hz in resonance frequency, 40cm in an allowable stroke), high-damping oil dampers and automatic leveling devices has a huge reduction effect to the vibration level. The site performance tests show high performances in vertical level maintenance ability when loading and unloading on the floor, and in habitability of the isolation floor to the walking vibration. The seismic observation records (seismic intensity III-IV in Tokyo) indicate that the isolation floor reduces a vertical vibration to 60% compared to non-isolation floor. The reduction rate should be expected to increase with ground motion input level due to the decrease of friction.
一般社団法人日本建築学会の論文
1994-03-15