This study investigates the seismic behavior of low-aspect-ratio reinforced concrete (RC) shear walls when subjected to bi-axial lateral loading, using nonlinear finite element analysis. A three-dimensional finite element model was developed with the DIANA program and validated against previously reported experimental results. Subsequently, a parametric study was conducted by varying the wall aspect ratio of horizontal reinforcing bars under both uni-axial and bi-axial loading conditions. The analysis results show that bi-axial loading reduces shear strength by a significant amount compared to uni-axial loading, and the reduction becomes more pronounced as the aspect ratio decreases. For low-aspect-ratio walls, the influence of horizontal reinforcement on shear strength was limited, while sensitivity to bi-axial loading increased. These findings indicate that uni-axial loading–based evaluation methods may overestimate the seismic capacity of low-aspect-ratio RC shear walls.

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1. 서 론
2. 철근 콘크리트 전단벽 해석 모델
    2.1 다축 하중 실험
    2.2 유한요소 모델
    2.3 유한요소 모델의 검증
3. 변수해석 및 결과
    3.1 해석 변수
    3.2 해석 결과
4. 다축 하중에서의 저형 전단벽의 전단강도
    4.1 수평 철근비에 따른 하중 변화
    4.2 형상비에 따른 성능 변화
5. 결 론
/ 감사의 글 /
/ REFERENCES /

• 양현근(박사후연수생 한국원자력연구원 구조･지진안전연구부) | Yang Hyeon Keun (Post-doctoral Researcher, Structural and Seismic Safety Research Division, Korea Atomic Energy Research Institute) Corresponding author
• 박준희(책임연구원 한국원자력연구원 구조･지진안전연구부) | Park Jun Hee (Principal Researcher, Structural and Seismic Safety Research Division, Korea Atomic Energy Research Institute)
• 김민규(책임연구원 한국원자력연구원 구조･지진안전연구부) | Kim Min Kyu (Principal Researcher, Structural and Seismic Safety Research Division, Korea Atomic Energy Research Institute)