433 形状記憶合金ばねを用いた免震装置の地震応答解析と設計指針の提案

概要

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In this paper, seismic response analysis is made both experimentally and numerically for a base isolation device with pseudoelastic shape memory alloy(SMA) springs as restoring force components. Owing to the material nonliniarity and the geometrical nonliniarity, the SMA spring used in the device has well-defined softening, or "force limiting", property that can suppress the acceleration response of the superstructure by limiting the seismic force transmitted from the ground. Numerical simulations are conducted using Preisach-based SMA spring model. Then, assuming the scalability of the restoring force v.s. displacement curve of the SMA spring, seismic responses of the devices with SMA springs which have various restoring force characteristics are investigated, numerically. From their results, brief design criteria are suggested.
社団法人日本機械学会の論文
2006-08-06