다양한 기초 형식에 따른 단자유도 구조물 지진하중 평가를 위한 동적 원심모형실험

서지정보

ㆍ발행기관 : 한국지진공학회 ㆍ수록지정보 : Jorunal of the Earthquake Engineering Society of Korea / 20권 / 5호
ㆍ저자명 : 하정곤, 조성배, 박헌준, 김동관, 김동수

목차

1. 서 론
2. 동적원심모형실험 모델링
3. 동적원심모형시험 결과
3.1 기초 및 구조물 측정 가속도
3.2 기초 대비 상대 구조물 응답 및 기초 록킹에 의한 구조물 응답
3.3 고정단 기초 거동 및 유연한 기초 거동
3.4 기초 회전각과 상부 구조물의 전도모멘트
4. 결 론
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영어 초록

Soil-foundation-structure interaction (SFSI) is one of the important issues in the seismic design for evaluating the exact behavior of the system. A seismic design of a structure can be more precise and economical, provided that the effect of SFSI is properly taken into account. In this study, a series of the dynamic centrifuge tests were performed to compare the seismic response of the single degree of freedom(SDOF) structure on the various types of the foundation. The shallow and pile foundations were made up of diverse mass and different conjunctive condition, respectively. The test specimen consisted of dry sand deposit, foundation, and SDOF structure in a centrifuge box. Several types of earthquake motions were sequentially applied to the test specimen from weak to strong intensity of them, which is known as a stage test. Results from the centrifuge tests showed that the seismic responses of the SDOF structure on the shallow foundation and disconnected pile foundation decreased by the foundation rocking. On the other hand, those on the connected pile foundation gradually increased with intensity of input motion. The allowable displacement of the foundation under the strong earthquake, the shallow and the disconnected pile foundation, have an advantage in dissipating the earthquake energy for the seismic design.

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