Shaking Table Test and Finite Element Analysis for Base-Insulated Building Model with Displacement Control Material and Magnets (Considering Magnetization and Eddy Current in Insulating Layer)

Abstract

Authors suggest a magnetically levitated foundation, insulated from the ground by magnets and supported by the displacement control material, for reducing the seismic response of small buildings. In this paper, we used metal components to improve the levitation force and damping characteristics. The static loading test indicated that a steel plate on the magnets increased the levitation force. The electromagnetic field analysis showed that a copper plate between the magnets acted as an eddy-current damper and can be represented by the Maxwell material. In addition, the seismic response of the magnetically levitated foundation was discussed based on the shaking table test and the structural analysis.