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2024 Vol.40, Issue 6 Preview Page
Dynamic Thermo-Hydro-Mechanical Modeling of a Saturated Porous Medium Using One-Dimensional Finite Element Analysis

포화 지반의 동적-열-수리-역학적 거동 분석을 위한 유한요소법 기반의 1차원 모델링 기법

SeonHong Na1
,
Seokjung Kim2*
나 선홍1
,
김 석중2*
1Member, Associate Prof., Dept. of Civil Engineering, Inha Univ.
2Member, Senior Researcher, Korea Institute of Civil and Technology
1정회원, 인하대학교 사회인프라공학과 부교수
2정회원, 한국건설기술연구원 지반연구본부, 수석연구원
*Corresponding Author
31 December 2024. pp. 79-86
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Abstract

With the growing importance of the deep geological disposal of high-level radioactive waste, this study investigates the long-term stability of deep geological disposal facilities to protect them from earthquakes. First, we present the governing equations for simulating the complex behavior of saturated porous media under dynamic conditions. A one-dimensional computational model based on the finite element method is then implemented, and numerical analyses are conducted to evaluate the effects of coupled thermo-hydro-mechanical processes, which are crucial for modeling complex responses in deep geological environments. Specifically, this study examines the influence of material compressibility, inertia forces, and thermal propagation resulting from coupled hydro-mechanical effects under dynamic conditions. Finally, this study provides key insights for evaluating the long-term stability of deep geological repositories for the disposal of high-level radioactive waste in the context of earthquakes.

Keywords
Dynamic analysis
Engineered barrier system
High-level radioactive waste
Thermos-hydro-mechanical modelling
Wave propagation

기후 변화와 안정적인 에너지 수급을 위해 차세대 원자력에 대한 관심이 높아지는 만큼, 필수 부산물인 고준위 방사성 폐기물의 심층 처분과 관련된 연구의 중요성이 커지고 있다. 본 연구에서는 심층 처분 시스템의 장기적 관점에서, 지진 하중에 의한 안정성을 평가하기 위한 기초적인 연구를 수행하였다. 동적 조건에서 포화된 지반의 열-수리-역학 거동을 모사할 수 있는 지배방정식을 제시하고, 이를 유한요소법을 기반으로 한 1차원 전산 해석 모델을 구현하였다. 이를 바탕으로 동적 조건에서 수치해석을 수행하였고, 복합 거동을 모델링할 때 고려할 수 있는 열-수리-역학 메커니즘의 영향을 평가하였다. 특히, 재료의 압축성 및 관성력이 동적 거동에 미치는 영향과 수리-역학 연계 메커니즘의 열전달 효과를 평가하고, 심층 지반 환경에서 동적 열-수리-역학 연계 분석의 필요성을 분석하였다.

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Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 40
  • No :6
  • Pages :79-86
  • Received Date : 2024-11-06
  • Revised Date : 2024-11-18
  • Accepted Date : 2024-11-18
  • DOI :https://doi.org/10.7843/kgs.2024.40.6.79
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