累積塑性歪エネルギー率の大きな座屈拘束ブレースの研究

抄録

The authors have studied the buckling-restrained brace providing stable hysteretic characteristic even under high-strain conditions. Structural performance of the buckling-restrained brace is represented by the evaluation formula that is the lower limit of the cumulative plastic strain energy ratio. However, when the duration of earthquakes gets extraordinarily longer, it is necessary to research and develop a new buckling-restrained brace with more high capacity of energy dissipation. In this paper, our past studies are analyzed and the conditions of high-performance of buckling-restrained braces are extracted. The considered buckling-restrained brace is tested. As a result, the buckling-restrained brace having large cumulative plastic strain energy ratio has been proposed.