C18 緊急地震速報を用いた高知能浮上免震システムの研究開発(OS8 機械・機械構造物の耐震・免震・振動制御(2)2)

概要

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Long period seismic waves having predominant period of from a few seconds to a few ten seconds have recently been observed in various earthquakes. Therefore extension of natural period of isolated structure is being required so as to avoid resonance with long period seismic wave. This paper proposes a new type isolation system having no natural period. The isolation system consists of air bearings as isolation devices, and an Early Earthquake Warning (EEW) system as a trigger of isolation. Air bearing is a bearing that can reduce contact friction between floor and the bearing by thin air film produced by compressed air. This paper describes a concept and components of the isolation system, properties of the air bearing, and results of vibration experiment. Finally good performance of isolation is confirmed.
2009-09-01