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A comparative study on the behavior of dynamic analysis and pseudo-static analysis considering SSI of a tall building and an adjacent underground structure

초고층 빌딩과 인접 지하구조물의 SSI를 고려한 동적해석과 유사정적해석의 거동 비교 연구

Kwang-Ho You1
,
Seung-Jin Kim2*
유 광호1
,
김 승진2*
1Professor, Dept. of Civil and Environmental Engineering, University of Suwon
2Graduated Student, Dept. of Civil and Environmental Engineering, University of Suwon
1정회원, 수원대학교 건설환경공학과 교수
2비회원, 수원대학교 건설환경공학과 석사과정
* Corresponding Author
31 July 2018. pp. 671-686
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Abstract

Recently, earthquakes have occurred near Gyeongju and Pohang and the social demands are thus being increased for seismic analysis of tall buildings and their adjacent underground structure in big cities. Since most of the previous seismic analysis studies considered a tall building and an adjacent underground structure separately, however, they lack the analysis on dynamic mutual behavior between two structures. Therefore, in this study, a dynamic analysis with a full soil-structure interaction was performed for a complex underground facility with a tall building and an adjacent underground structure constructed on the bedrock with a surface layer. To improve the reliability, in particular, a pseudo-static analysis was performed and compared with the dynamic analysis results. It is comprehensively concluded that the analysis of adjacent underground structures being considered is more conservative than that of not considered.

Keywords
Dynamic analysis
Pseudo-static analysis
Soil-structure interaction
Dynamic factor of safety
Adjacent underground structure

최근 경주, 포항 인근에서 지진이 발생하여 대도시의 초고층 빌딩과 그에 인접한 지하구조물의 내진해석에 대한 사회적 요구가 증가하고 있다. 그러나 기존에 수행되어 왔던 대부분 내진해석 연구는 초고층 빌딩과 지하구조물을 개별적으로 분석하여 구조물간 동적 상호거동 연구가 부족한 실정이다. 따라서 본 연구에서는 기반암과 표층으로 이루어진 지반에 건물과 인접 지하구조물이 설치된 복합지하시설물을 대상으로 지반과 구조물을 동시에 고려한 동적해석을 수행하였다. 특히 신뢰도를 높이기 위해 유사정적해석을 추가로 수행하여 동적해석 결과와 비교 ‧ 분석하였다. 종합적으로 복합시설물에 대한 SSI 해석 시 인접 지하구조물을 고려하는 것이 보다 보수적인 방법이라고 결론 내렸다.

키워드
동적해석
유사정적해석
지반-구조물 상호작용
동적안전율
인접 지하구조물
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Information
  • Publisher :Korean Tunneling and Underground Space Association
  • Publisher(Ko) :한국터널지하공간학회
  • Journal Title :Journal of Korean Tunnelling and Underground Space Association
  • Journal Title(Ko) :한국터널지하공간학회 논문집
  • Volume : 20
  • No :4
  • Pages :671-686
  • Received Date : 2018-05-16
  • Revised Date : 2018-06-20
  • Accepted Date : 2018-06-26
  • DOI :https://doi.org/10.9711/KTAJ.2018.20.4.671
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