This paper proposes an Adjustable Circular Steel Connector(ACS) to enable immediate response to construction errors that may occur during the on-site assembly of modular members. To evaluate its flexural performance, one rectangular steel tube beam specimen without ACS and three specimens with ACS(with varying ACS lengths) were fabricated. Experimental results showed no pull-out occurred between Shank A and Shank B, and the application of ACS facilitated stress distribution in the rectangular steel tube. The specimens with ACS exhibited up to 92% of the maximum load capacity of the monolithic specimen, and showed increasingly ductile behavior as the ACS length increased. Due to the cross-sectional difference between Shank A and Shank B within the ACS, yielding was observed in Shank B. Further studies are needed on this part, as well as on the behavior of the ACS under cyclic loading conditions.

Abstract
1. 서론
2. 실험 개요
    2.1 길이 조절이 가능한 접합부 ACS
    2.2 시험체 상세
    2.3 제작과정
    2.4 실험 계획
3. 실험 결과
    3.1 파괴양상
    3.2 하중-변위 관계
    3.3 ACS 변형률
    3.4 에너지 소산 능력
4. 결론
감사의 글
References

• 강주화(경희대학교 건축공학과, 석사과정) | Kang Ju-Hwa (Department of Architectural Engineering, Kyung Hee University)
• 김민숙(경희대학교 건축공학과 연구교수, 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