논문 상세보기
The tensile performance of anchors strongly influences the seismic safety of nuclear power plant equipment, as tensile failure of anchors has been identified as a governing failure mode in seismic fragility assessments. To improve the reliability of tensile-strength evaluation, this study examines existing design codes and research-based models by comparing them with experimental data. Design codes generally yield conservative estimates because they give limited consideration to anchor reinforcement. In contrast, research-based models provide a more accurate representation of load-sharing behavior between concrete breakout and anchor reinforcement but require relatively complex calculations for practical design applications. Based on experimental observations, a simplified method for evaluating tensile strength is proposed. The proposed method evaluates the combined resistance of concrete breakout and anchor reinforcement yielding or bond failure. Seismic fragility analysis results indicate that methods incorporating both concrete and reinforcement contributions increase the median capacity and HCLPF by approximately 11-20% compared to code-based approaches. These findings highlight the significant influence of tensile strength modeling on seismic performance assessment. The proposed method enables a more realistic and practical evaluation of anchor tensile strength, thereby improving the seismic safety assessment of nuclear power plant equipment.
1. 서 론
2. 앵커철근이 배근된 앵커의 인장강도 산정기법
2.1 Eurocode 2[1]
2.2 ACI 318-25[3]
2.3 Eligehausen et al.[2]
2.4 INFASO[4]
2.5 Sharma et al.[5]
3. 앵커철근이 배근된 앵커에 대한 기존 실험 연구
3.1 기존 실험 연구의 실험 변수 및 조건
3.2 앵커철근 효과에 대한 실험 결과 고찰
4. 기존 인장강도 산정기법의 검증 및 개선
4.1 기존 인장강도 산정기법의 예측 성능 평가
4.2 설계 적용을 위한 간략 인장강도 산정식 제안
5. 기기 지진취약도 분석
5.1 대상 기기 및 요구 지진력
5.2 기기 성능 및 취약도 분석
6. 결 론
/ 감사의 글 /
/ REFERENCES /
