The purpose of this study is to experimentally analyze the seismic performance of beam-column specimens with vertical irregular, which were reinforced with RHS (Replaceable steel haunch system). a steel haunch system. To evaluate the seismic performance of the RHS, three specimens were manufactured and subjected to cycle loading tests. Retrofitted specimens have different beam-upper column stiffness ratio as a variable. The stiffness ratio of beam-upper column were considered to be 1.2 and 0.84. As a result of the test, the specimen reinforced with RHS showed improved maximum load and effective stiffness, and energy dissipation capacity compared to the non-retrofitted specimen with same beam-upper column stiffness ratio. The specimen with 0.84 beam-upper column stiffness ratio showed improved performance than the specimen with 12.

1. 서론
2. 실험개요
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
References

• 김윤성(경희대학교 건축공학과, 석사과정) | Kim Yoon Sung (Department of Architectural Engineering, Kyung Hee University)
• 김민숙(경희대학교 건축공학과 학술연구교수, 공학박사) | Kim Min Sook (Department of Architectural Engineering, Kyung Hee University)
• 이영학(경희대학교 건축공학과 교수, 공학박사) | Lee Young Hak (Department of Architectural Engineering, Kyung Hee University) Corresponding author