A great variety of earthquakes such as the long period and long duration are predicted in the future. A high-performance buckling-restrained brace that is effective for those earthquakes is necessary. The authors have studied the buckling-restrained brace that has high-energy absorption capacities even in the high strain amplitude domain. However, not only the energy absorption capacities but also the fatigue performance is important. Therefore the authors confirm whether the buckling-restrained brace that had high-energy absorption capacities would become high-performance in the fatigue life. As a result, this buckling-restrained brace shows the high fatigue performance at the high strain amplitude domain.
