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Research Article

Dynamic Characteristics of the Box Structure in Multi-layered Ground Under Earthquake Load

지진하중을 받는 다층지반내 박스구조물의 동적 특성

In Dae Kim1
,
Eun Chul Shin2
,
Jeong Jun Park3*
김 인대1
,
신 은철2
,
박 정준3*
1Member, Executives, Kyong-Ho Engineering & Architects., Kyongho Building, 209 Jungdae-Ro, Songpa-Gu, Seoul 05702, Republic of Korea
2Member, Professor, Department of Civil and Environmental Engineering, Incheon National Univ., 119 Academy-ro, Yeonsu-gu, Incheon 22012, Republic of Korea
3Member, Research Professor, Incheon Disaster Prevention Research Center, Incheon National Univ., 119 Academy-ro, Yeonsu-gu, Incheon 22012, Republic of Korea
* Corresponding Author
31 March 2020. pp. 55-63
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Abstract

본 연구에서는 다층으로 구성된 깊은 토사지반 내 박스구조물에 대하여 지진하중이 작용할 때 동적거동 특성을 규명하기 위하여 진동대를 이용한 축소모형시험과 유효응력을 고려한 내진해석을 수행하였다. 입력지진파는 장주기파(Hachinohe), 단주기파(Ofunato)와 인공지진파 및 최근 경주 및 포항지역에서 발생한 실지진파 등 5개의 지진파를 사용하여 하부지반에서 작용시켰다. 모형실험 및 수치해석 분석결과, 지진하중 작용시 박스구조물에 발생하는 변위는 연직방향이 수평방향에 비해 크게 발생하였으며, 기초지반 하부의 과잉간극수압 증가가 변위를 유발하는 것으로 확인하였다. 또한, 실지진파에 비해 인공지진파 작용시 지반 및 지중구조물의 동적거동이 크게 나타났다.

In this study, a scaled model test of the shaking table and a seismic analysis considering effective stresses were performed to reveal the dynamic behavior characteristics of box structures deep located in multi-layered soils upon seismic loading. The input seismic wave was operated below the ground using five seismic waves, including long period wave (Hachinohe), short period wave (Ofunato), artificial wave and real earthquakes that occurred in Gyeong-ju and Po-hang. As a result of model test and numerical analysis, the vertical displacement of box structures upon seismic loading was greater than that of horizontal direction, and it was confirmed that an increase of excess pore water pressure below the foundation ground caused a displacement. In addition, behavior of the ground and structures during artificial seismic wave appeared to be larger than real earthquake wave.

Keywords
Earthquake
Shaking table test
Effective stress
Seismic analysis
Seismic performance evaluation

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Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 19
  • No :1
  • Pages :55-63
  • Received Date : 2020-03-03
  • Revised Date : 2020-03-18
  • Accepted Date : 2020-03-21
  • DOI :https://doi.org/10.12814/jkgss.2020.19.1.055
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