Journal of Korean Tunnelling and Underground Space Association (한국터널지하공간학회 논문집)

Korean Tunnelling and Underground Space Association (한국터널지하공간학회)
권호 표지
DOI QR코드

DOI QR Code

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
Download PDF
⟨ Previous Next ⟩

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.

최근 경주 포항 등 대도시에서 지진이 발생하고 이에 각 분야에서의 내진해석 연구가 활발히 진행되고 있다. 하지만 대부분의 기존 내진해석은 지상구조물과 지반을 따로 다루었기 때문에 지반과 구조물의 완전한 상호 동적거동에 대한 연구가 부족한 실정이다. 따라서 본 연구에서는 건물만 고려하는 지하구조물 고정단 모델과 건물과 지반을 함께 고려하는 연속체 모델을 각각 적용하기 위해 MIDAS GEN 및 MIDAS GTS NX를 이용하여 민감도 분석을 수행하고 SSI를 고려한 동적해석의 타당성을 살펴보았다. 연구 결과, 대부분의 조건에서 지하구조물 고정단 모델이 연속체 모델보다 초고층 건물의 최대 순수 수평변위를 더 작게, 휨응력을 더 크게, 또한, 취약부의 범위는 더 작게 산출하는 것으로 나타났다. 따라서 내진해석 시 지반-구조물 상호작용을 고려한 연속체 모델을 사용하는 것이 보다 타당할 것으로 판단된다.

Keywords

References

  1. Hanyang University (2017), Development of artificial intelligence algorithm for real time damage detection based on acceleration sensor arrangement, The 2016 Commission Research Report of Multi Disaster Countermeasures Organization, Korea Institute of Civil Engineering and Building Technology, pp. 51.
  2. Kim, S.Y. (2016), "Economic and seismic performance evaluation of irregular tall steel buildings", Journal of the Korean Society of Steel Construction, Vol. 28, No. 3, pp. 23-27. https://doi.org/10.7781/kjoss.2016.28.1.023
  3. Lysmer, J., Kuhlemeyer, R.L. (1969), "Finite dynamic model for infinite media", Journal of the Engineering Mechanics Division, ASCE, Vol. 95, No. 4, pp. 859-878.
  4. MIDAS Information Technology Co. (2016), MIDAS GTS NX user manual, MIDAS Information Technology Co., Korea, pp. 445.
  5. Ministry of Land, Infrastructure and Transport (2016), Concrete standard specification, Ministry of Land, Infrastructure and Transport, Korea, pp. 358.
  6. National Disaster Management Research Institute (2012), Development of the public buildings emergency integrity assessment technology using seismic acceleration response signal, National Disaster Management Research Institute, pp. 253.
  7. Newmark, N.M. (1959), "A method of computation for structural dynamics", Journal of the Engineering Mechanics Division, ASCE, Vol. 85, No. 3, pp. 67-94.
  8. Pacific Earthquake Engineering Research Center (2017), Tall building initiative guidelines for performance-based seismic design of tall buildings, University of California, Berkeley, pp. 147.
  9. Seoul Metropolitan Government (2006), Ground investigation manual, Seoul Metropolitan Government, pp. 130.
  10. University of Suwon (2017), Development of a behavior prediction model by interaction of underground complex facilities for ground vibration, The 2016 Commission Research Report of Multi Disaster Countermeasures Organization, Korea Institute of Civil Engineering and Building Technology, pp. 133.
  11. You, K.H., Kim, Y.J. (2018), "A preliminary numerical analysis study on the seismic stability of a building and underground structure by using SSI", Journal of Korean Tunneling and Underground Space Association, Vol. 20, No. 1, pp. 23-38.
  12. You, K.H., Park, Y.J., Hong, K.Y., Kim, J.K. (2005), "Numerical estimation for safety factors of tunnels considering the failure of supports", Journal of Korean Tunneling and Underground Space Association, Vol. 7, No. 1, pp. 37-49.