水平2方向載荷下における繰り返し変形性能に関する実験

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書誌事項

タイトル別名
  • EXPERIMENTAL EVALUATION OF CYCLIC DEFORMATION CAPACITY OF U-SHAPED DAMPERS SUBJECTED TO BI-DIRECTIONAL LOADINGS
  • 水平2方向載荷下における繰り返し変形性能に関する実験 : 免震構造用U字形鋼材ダンパーの水平2方向特性(その1)
  • スイヘイ 2 ホウコウサイニオロシ ニ オケル クリカエシ ヘンケイ セイノウ ニ カンスル ジッケン : メンシンコウゾウヨウ U ジケイ コウザイ ダンパー ノ スイヘイ 2 ホウコウ トクセイ(ソノ 1)
  • - Bi-directional characteristics of U-shaped steel dampers for base-isolated structures Part 1 -
  • － 免震構造用U字形鋼材ダンパーの水平2方向特性　その1 －

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抄録

Evaluation of bi-directional characteristics of base-isolation devices is a very important issue for base-isolated structures. This paper describes a bi-directional loading test of U-shaped steel dampers widely-used for energy dissipation in base-isolated structures. The major findings obtained from the test are as follows: (1) torsion-induced residual deformation leads to contact with damper connections; (2) evaluation method of cyclic deformation capacity, which divides bi-directional orbit into deformations in 0 and 90 degree, is proposed and the validity is verified; (3) cyclic deformation capacity is reduced by cumulative torsion; (4) two indices Jc and Jf proposed in this paper can evaluate the limitation of cumulative torsion until contact with connections and the tendency of torsioninduced reduction of cyclic deformation capacity.

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