The purpose of this study is to experimentally analyze the seismic performance of a vertical irregular beam-column specimen reinforced with RBS (Replaceable Steel Brace System), a steel brace system. To evaluate the seismic performance of RBS, three specimens were manufactured and subjected to cycle loading tests. The stiffness ratio of beam-upper column of the non-retrofitted specimen was 1.2, and those of the two retrofitted specimens were 1.2 and 0.84. The stiffness ratio of the beam-lower column of all specimens was 0.36. And the stiffness ratio were used for variable. As a result of the experiment, the specimen retrofitted with RBS showed improved maximum load, effective stiffness and energy dissipation capacity compared to the non-retrofitted specimen with the same beam-upper column stiffness ratio. The specimen with 0.84 beam-upper column stiffness ratio showed improved performance compared to the specimen with 1.2 stiffness ratio.

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

• 정승환(경희대학교 건축공학과, 박사과정) | Jung Seung Hwan (Department of Architectural Engineering, Kyung Hee University)
• 김윤성(경희대학교 건축공학과, 석사과정) | Kim Yoon Sung (Department of Architectural Engineering, Kyung Hee University)
• 이영학(경희대학교 건축공학과 교수, 공학박사) | Lee Young Hak (Department of Architectural Engineering, Kyung Hee University) Corresponding author