This study is conducted to verify the seismic reinforcement effects of internally inserted buckling-restrained braces supported laterally by buckling-restrained rings for the seismic reinforcement of existing reinforced concrete buildings with non-seismic details. First, to evaluate the performance of KDS, the hysteretic characteristics of buckling-restrained braces are verified, and it is discovered that they satisfy the conformance criteria of the displacement-dependent damping device. Three full-scale, two-story reinforced concrete framework specimens are prepared to verify the seismic reinforcement effects, and the proposed buckling-restrained braces are bolstered with single diagonal and V-shaped braces to be compared with non-reinforced specimens. By performing a comparison with non-reinforced specimens that present intensive shear cracks at the bottom of first-floor columns, it is revealed that the maximum load and energy dissipation of specimens reinforced with the proposed buckling restrained braces, in which the structural damage extends evenly throughout the system, are approximately 4 and 6.2 times higher, respectively, which proves the effectiveness of the proposed seismic reinforcement method.

ABSTRACT
1. 서 론
2. 좌굴방지가새 내진프레임 시스템
    2.1 좌굴방지가새 내진프레임의 구성
    2.2 좌굴방지가새의 설계
    2.3 좌굴방지가새의 실험계획
    2.4 좌굴방지가새의 실험결과
3. 2층 실물 골조실험
    3.1 좌굴방지가새 내진프레임 시스템의 실험계획
    3.2 좌굴방지가새 내진프레임 시스템 실험방법
    3.3 하중-변위 관계
    3.4 균열 및 파괴양상
    3.5 강성변화 및 강성저하 비교
    3.6 에너지소산평가
4. 결 론
REFERENCES

• 이선재(단국대학교 건축공학과 박사과정) | Lee Seon Jae (Ph.D. Student, Department of Architectural Engineering, Dankook University)
• 문희숙(메트로티엔씨(주) 내진기술연구소 선임연구원) | Moon Hee Suk (Researcher, Technical Research Center, Metro T&C Co.,)
• 박병태(메트로티엔씨(주) 내진기술연구소 연구소장 공학박사) | Park Byung Tae (Ph.D., CTO, Technical Research Center, Metro T&C Co.) Correspondence author