Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Dynamic Centrifuge Tests for Evaluating the Earthquake Load of the Structure on Various Foundation Types

다양한 기초 형식에 따른 단자유도 구조물 지진하중 평가를 위한 동적 원심모형실험

  • 하정곤 (한국과학기술원, 건설 및 환경공학과) ;
  • 조성배 (K-water 연구원, 기반시설연구소) ;
  • 박헌준 (한국과학기술원, 건설 및 환경공학과) ;
  • 김동관 (센구조 연구소, 연구개발부) ;
  • 김동수 (한국과학기술원, 건설 및 환경공학과)
  • Received : 2015.09.15
  • Accepted : 2016.04.24
  • Published : 2016.09.01
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Abstract

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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