The authors have researched on the design requirement of shear panel damper. In this paper, to show the applicable limit of fatigue relational, we performed cyclic loading test of shear-panel-damper. As a result, the applicable usage limit for fatigue relational can be expanded up to about 0.38 normalized width-to-thickness ratio. Fatigue life becomes shorter when the shear deformation angle of the panel is higher than 0.08 rad. Then, cracks grows at the center of the panel even if the normalized width-to-thickness ratio is lower than 0.38. These results showed the validity and effectiveness of the expressions and the method.
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