논문 상세보기
Pseudo-static approach has been conventionally applied for the design of gravity type quay walls. In this method, seismic coefficient (kh), expressed in terms of acceleration due to gravity, is used to convert the real dynamic behavior to an equivalent pseudo-static inertial force for seismic analysis and design. Therefore, the calculation of an appropriate kh considering frequency characteristics of input earthquake is critical for representing the real dynamic behavior. However, the definitions of kh, which is used for simplified analysis in Korea, focuses only on convenience that is easy to use, and the frequency characteristics of input earthquake are not reflected in the kh definitions. This paper evaluates the influences of the frequency characteristics of input earthquake on kh by initially reviewing the kh definitions in the existing codes of Japan for port structures and then by performing a series of dynamic centrifuge tests on caisson gravity quay walls of different earthquake input motions (Ofunato, Hachinohe). A review of the existing codes and guidelines has shown that the kh values are differently estimated according to the frequency characteristics of input earthquake. On the other hand, based on the centrifuge tests, it was found that the permanent displacements of wall are more induced when long-period-dominant earthquake is applied.
2. 국내․ 외 주요 수평지진계수(kh) 산정법 분석
3. 입력 지진 주파수 특성을 고려한 수평지진계수(kh)산정법 분석
3.1 Technical Standards and Commentaries for Port and HarbourFacilities in Japan (1999)
3.2 Technical Standards and Commentaries for Port and HarbourFacilities in Japan (2007)
3.3 실지진기록을 이용한 입력 지진의 주파수 특성에 따른 kh 산정결과 비교 분석
4. 동적원심모형실험을 통한 입력 지진의 주파수특성이 안벽의 수평변위에 미치는 영향 평가
4.1 안벽의 모델링
4.2 지반의 조성
4.3 계측
4.4 입력지진
4.5 동적원심모형실험 결과 및 분석
5. 결론 및 고찰
감사의 글
REFERENCES
