Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
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Comparison of Modified Berggren Method with Numerical Method for the Frost Penetration Depth

수정 Berggren 법과 수치해석법에 의한 동결깊이 산정 비교

  • Published : 2013.06.01
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Abstract

This paper presents computed frost penetration depths for a number of cross sections of multilayered system including insulation. Results of Modified Berggren method were compared with those of numerical analysis which is based on finite element method with phase change. For the homogeneous single layer medium, Modified Berggren method gives almost the same results as finite element based numerical method. For the multilayered systems with insulation, Modified Berggren method shows, however, inaccurate results compared with FEM results. Therefore numerical solution based on finite element or finite difference should be used in place of Modified Beggren method to estimate the frost penetration depth for the layered medium with insulation.

본 논문은 수정 Berggren 법과 상전이 현상을 모델링할 수 있는 유한요소 수치해석법을 사용하여 단열재를 포함한 대표적인 다층 지반에 대하여 동결깊이를 산정하여 비교 분석하였다. 균일한 단층 지반에서 수정 Berggren 법은 유한요소 수치해석법과 거의 동일한 결과를 보여주고 있다. 그러나 단열재를 포함한 다층 지반에서 수정 Berggren 법은 유한요소 수치해석 결과와 비교할 때 정확하지 않은 결과를 나타내고 있다. 따라서 단열재를 포함한 다층 지반에서는 수정 Berggren 법 대신에 유한요소나 유한차분법에 기반을 둔 수치해석법을 사용하여 동결깊이를 산정하여야 할 것으로 사료된다.

Keywords

References

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