空気浮上による低摩擦型水平地震動免震装置の開発

抄録

Damage free technologies from unexperienced huge earthquakes arising frequently from far and near field are needed. Hence the pneumatic levitation technology which can isolate perfectly from earthquake ground motion is focused. Into practical use of this, technical points are 1) big area supporting by simple mechanism, 2) less energy and 3) high performance. After fundamental experiments, some important outcomes are obtained. Then we propose a new type seismic isolator with pneumatic levitation which have a small and thin air chamber sealed by resin sheets but slightly leaked to reduce the sliding frictional force. This floating mechanism demonstrates some superior performances of 1) easy supporting large loads, 2) low energy requirements of compressed air, 3) high level isolation for horizontal vibration, 4) stiff spring characteristics for vertical and rotational vibration and so on.