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A validity study on SSI analysis by comparing the complete system model and the underground structure fixed-end model

연속체 모델과 지하구조물 고정단 모델의 비교를 통한 SSI 해석의 타당성 연구

  • You, Kwang-Ho (Dept. of Civil and Environmental Engineering, University of Suwon) ;
  • Kim, Seung-Jin (Dept. of Civil and Environmental Engineering, University of Suwon)
  • 유광호 (수원대학교 건설환경공학과) ;
  • 김승진 (수원대학교 건설환경공학과)
  • Received : 2016.06.11
  • Accepted : 2018.08.02
  • Published : 2018.09.30

Abstract

Recently, earthquakes have occurred in large cities such as Gyeongju and Pohang, and seismic analysis studies have been actively conducted in various fields. However, since most of the previous seismic analyses have dealt with ground structures and the ground separately, there is a lack of a study on the complete soil-structure dynamic interaction. Therefore, in this study, a sensitivity analysis is conducted with MIDAS GEN and MIDAS GTS NX to apply the underground structure fixed-end model considering only the building and the complete system model considering both the building and the ground, respectively and the validity of dynamic analysis considering SSI is examined. As a result of the study, in most conditions it is found that the maximum horizontal displacement of the tall building in case of the underground structure fixed-end model is estimated to be smaller, the bending stress is larger, and the range of the weak part is smaller than that of the complete system model. Therefore, it is expected to be more reasonable to use the complete system model considering soil-structure interaction in seismic analysis.

Acknowledgement

Supported by : 국가과학기술연구회 융합연구단

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