The present invention relates to an O-shaped buckling prevention brace filled with an internal filler, and in more detail, superior strength and deformation capacity than the prior art by filling the internal filler instead of the mortar used as a filler for the existing buckling prevention brace. It provides an O-shaped buckling prevention brace filled with an internal filler capable of resisting from external external force.
As described above, by providing an O-shaped buckling prevention brace filled with an internal filler that can secure excellent lateral force and deformation capacity, the core material of the steel frame brace is restrained so that stable deformation can occur even when a large compressive force is applied. By providing an O-shaped buckling-preventing brace filled with an internal filler that can be used, there is an effect of reducing the overall self-weight and shortening the manufacturing time.