Buckling-restrained brace and seismic force-resisting structure

Abstract

A buckling-restrained brace (1) includes a core (2) and a restrainer (3), the core (2) includes a first steel plate (21) having a first yield point, a second steel plate (22) having a second yield point different from the first yield point, and a third steel plate (23) having a third yield point different from the first yield point, the first steel plate is sandwiched between the second steel plate and the third steel plate, and a length of a first yielding segment (21a) of the first steel plate (21) in the axial direction is different from a length of the second yielding segment (22a) of the second steel plate (22) in the axial direction, and is different from a length of the third yielding segment (23a) of the third steel plate (23) in the axial direction.