Conversion of Damping to Wall-Length Ratio of Resisting Wall

Abstract

Nowadays, many damping devices for Japanese wooden houses are developed. Nevertheless, an easy structural design method for Japanese wooden houses with dampers is not confirmed. In this report, the conversion method of damping capacity to the wall length of resistant walls is proposed. This conversion method is in consideration of both the absorbed energy in a cycle and the resistant force at the maximum displacement in a cycle. In addition, this method is checked with response analysis on both artificial earthquake motions and observed earthquake motions. As a result, the conversion wall length of viscous damper is on the safe side. The conversion wall length of hysteresis damper and dampers with a relief valve is in use if the maximum displacement increases by 20% compared to the maximum displacement without dampers in some case.