ON EQUIVALENT SHEAR BUCKLING DEFORMATION ANGLE FOR SHEAR PANEL DAMPER

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  • TAMAI Hiroyuki
    Prof., Dept. of Engineering, Faculty of Engineering, Nagasaki Univ., Dr. Eng.

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  • せん断パネルダンパーの等価せん断座屈変形角について
  • センダンパネルダンパー ノ トウカ セン ダンザクツヘンケイカク ニ ツイテ

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Abstract

Shear panel dampers consisting of stiffeners and a panel surrounding four flanges are used as aseismic dampers for buildings in Japan. Cracks can easily form in the shear panel damper when the panel undergoes shear buckling during cyclic loading caused by a severe earthquake. For relatively thin panel, when width-to-thickness ratio is large, the plastic deformation capacity of the damper can be evaluated by using the maximum-deformation-angle. Then the shear buckling in elasto-plastic range can be detected by checking maximum-deformation-angle. An expression for estimating plastic deformation capacity for shear-thin-panel-damper, which has parameters such as normalized width-to-thickness-ratio and deformation angle, is presented. To show the validity of the expression, cyclic loading tests of shear-panel-damper were reviewed and performed . Also clumped panels subjected to cycle in-plane shear deformation were analyzed using geometrical and material non-linear F.E.M. analysis to check the expression. These results showed the validity and effectiveness of the expression for shear panel damper.

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