This study aims to refine the existing shear strength model for reinforced concrete(RC) beam–column connections by explicitly incorporating the bi-directional loading effect, which more accurately reflects the actual loading conditions of RC structures during earthquakes. A new database consisting of 21 RC beam–column connection specimens tested under simultaneous bi-directional loading was collected and analyzed to investigate the influence of key parameters on joint shear strength. The results revealed that the joint configuration and the presence of a slab are the primary factors governing the extent of bi-directional loading effect on joint shear strength. Based on these findings, a set of simple and practical modification factors was proposed to refine the existing joint shear strength model to account for bi-directional loading effect. The outcomes of this study provide a rational basis for incorporating bi-directional loading effect into the shear strength evaluation of RC beam–column connections

Abstract
1. 서론
2. 기존 전단강도 모델
3. 데이터베이스 분석
    3.1 데이터베이스 수집
    3.2 변수 분석
4. 전단강도 보정계수 제안
5. 결론
감사의 글
References

• 김재현(서울시립대학교 건축공학과, 박사후연구원, 공학박사) | Kim Jae Hyun (Dept. of Architectural Engineering, University of Seoul)
• 주효은(서울시립대학교 건축학부, 조교수, 공학박사) | Joo Hyo Eun (Dept. of Architecture, University of Seoul)
• 한선진(전주대학교 건축공학과, 조교수, 공학박사 ) | Han Sun-Jin (Dept. of Architectural Engineering, Jeonju University) Corresponding author