Full-scale in-situ testing of a building frame that was seismically strengthened with a K-type steel brace was carried out. The experimental results showed the tensile and compressive yield for the brace, and shear failure of the RC columns. The strength obtained satisfied the assumed design values. Strength and ductile resistance types applied. The shear strength and bending strength of the existing RC columns were greater than the analysis values, because the upright frame member of the brace

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... frame extended to the rigid section of the existing RC columns and beams, and combined with the existing RC columns. Full-scale in-situ testing of a building frame that was seismically strengthened with a K-type steel brace was carried out. The experimental results showed the tensile and compressive yield for the brace, and shear failure of the RC columns. The strength obtained satisfied the assumed design values. Strength and ductile resistance types applied. The shear strength and bending strength of the existing RC columns were greater than the analysis values, because the upright frame member of the brace frame extended to the rigid section of the existing RC columns and beams, and combined with the existing RC columns.