J1010402 ねじれ防止対策を施した小型3次元免震装置の開発([J101-4]耐震・免震・制震 免震(2))

Abstract

In the great earthquake, such as the Great East Japan Earthquake March 11 2011, period occurred to long-period ground motion of more than 2 seconds, and generates the damage over a wide range. Frequency of long-period ground motion is close to frequency of tall building, so tall building is caused resonance by long-period ground motion. Then resonance causes to tip over medical equipment and computer server. Therefore, development of new small seismic isolation device for installed into buildings in preventing earthquake damage is required. This study uses the bending stiffness soft high damping elastomer that has effect that reduces response displacement according to long-period ground motion. The development of small three-dimensional seismic isolation equipment which has been subjected to torsion prevention measure and used the bending stiffness soft high damping elastomer is intended to reduce the damage caused by earthquake. Height of experiment device is as low as 282 mm due to practical use, and sets to 500 × 500 mm in order to ensure the space of response displacement. Further, the bending rigidity is obtained by CAE analysis, and then the shape of the elastomer was determined dimensions. The experimental device is used the low friction roller and the soft bending stiffness high damping elastomer in the supporting the device in seismic isolation of the horizontal direction, and is used a friction plate of magnet and the displacement friction force in the compression spring comes in seismic isolation of the vertical direction. This study is an experimental device on an earthquake wave reproduction device and test it using a real earthquake wave pattern and confirm the performance of the experimental device, and the study contents make an analysis model more and analyze simulation and, in what it compares with the laboratory finding of the experimental device, check the effectiveness of the analysis model and confirm the performance of the device caused by the real earthquake by the simulation analysis.