免震建物における粘性マスダンパーの軸力制限と緩衝ばねの効果

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  • EFFECT OF DAMPING FORCE RESTRICTION AND BUFFER SPRING OF VISCOUS MASS DAMPER IN BASE-ISOLATED BUILDINGS
  • メンシンタテモノ ニ オケル ネンセイ マスダンパー ノ ジクリョク セイゲン ト カンショウバネ ノ コウカ

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In this paper, we propose installing a buffer spring into a base-isolated system incorporated with a viscous mass damper as a method to reduce excessive acceleration induced by the secondary mass. We derived transfer functions of a two-degree-of freedom model on the basis of equivalent linearization method using complex stiffness model and the effectiveness of this system was examined by non-linear time history response analysis for real buildings. These results confirmed that the buffer spring as well as the damper force restriction is effective in reduction of accelerations and damper forces without deterioration in displacement reduction effect brought by the secondary mass.

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