Damping effects are affected by frame, allocation of damper, and so on. In practical design, it takes time to obtain optimal configuration for a lot of dynamic response analysis. This study aims at evaluating damping effects for only static analysis. A series of dynamic or static analysis are conducted for typical steel high-rise buildings(thirty story buildings). Furthermore, three types of frame models varied stiffness and four kinds of damper configuration patterns are used. The results show that damping effects are affected by configutation patterns. This response can be grasped by effective damper deformation ration. This paper proposes new performance index that can be evaluated damping effects in place of effective damper deformation ration, and shows its usefulness.
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