논문 상세보기
For important structures such as nuclear power plants, In-Structure Response Spectrum (ISRS) analysis is essential because it evaluates the safety of equipment and components installed in the structure. Because most structures are asymmetric, the response can be affected by eccentricity. In the case of seismically isolated structures, this effect can be greater due to the difference between the center of mass of the structure and the center of rigidity of the isolator layer. Therefore, eccentricity effects must be considered when designing or evaluating the ISRS of seismically isolated structures. This study investigated the change of the ISRS of an isolated structure by assuming accidental eccentricity. The variables that affect the ISRS of the isolated structure were analyzed to see what additional impact they had due to eccentricity. The ISRS of the seismically isolated structure with eccentricity was amplified more than when there was non-eccentricity, and it was boosted more significantly in specific period ranges depending on the isolator’s initial stiffness and seismic intensity. Finally, whether the displacement requirement of isolators can be applied to the variation of the ISRS due to eccentricity in the design code was also examined.
2. 편심효과에 의한 면진구조의 지진응답 및 편심기준
2.1 편심으로 인한 구조물 지진응답
2.2 면진구조물 편심기준
3. 해석 모델 및 입력지진파
3.1 구조물 및 면진장치 모델
3.2 입력지진파 및 해석 Case
4. 면진구조물 ISRS 편심효과 분석
4.1 편심으로 인한 면진구조물 변위 증폭
4.2 1축가진 해석의 ISRS 결과
4.3 2축가진 해석의 ISRS 결과
5. 결 론
