This study aims to assess the seismic performance of retrofitted reinforced concrete columns using a Replaceable Steel Brace (RSB) system, subjected to combined axial, lateral, and torsional loadings. Through experimental testing, one non-retrofitted concrete column specimen and two retrofitted specimens with variable sliding slot lengths were subjected to eccentric lateral loads to simulate realistic seismic loading. The retrofitted specimens with RSBs exhibited enhanced resistance against shear cracking, effective torsional resistance, and demonstrated the feasibility of easy replacement. The RSB system substantially improved seismic performance, achieving approximately 1.7 times higher load capacity and 3.5 times greater energy dissipation compared to non-retrofitted column, thus validating its efficacy under combined loading conditions.

1. 서론
2. 실험개요
3. 실험 결과 및 분석
    3.1 균열 및 파괴양상
    3.2 변형률
    3.3 하중-변위 관계
    3.4 에너지 소산 능력
4. 결론
감사의 글

• 노경민(정회원, 경희대학교 건축공학과 박사후연구원, 공학박사) | Ro Kyong Min (Department of Architectural Engineering, Kyung Hee University)
• 김윤성(학생회원, 경희대학교 건축공학과, 석사과정) | Kim Yoon Sung (Department of Architectural Engineering, Kyung Hee University)
• 김민숙(정회원, 경희대학교 건축공학과 학술연구교수, 공학박사) | Kim Min Sook (Department of Architectural Engineering, Kyung Hee University)
• 이영학(정회원, 경희대학교 건축공학과 교수, 공학박사) | Lee Young Hak (Department of Architectural Engineering, Kyung Hee University) 교신저자