Numerical Analysis for Comparing Beam-spring and Continuum Model for Buried Pipes Considering Soil-pipe Interaction

Jeonghun Yang; Youngjin Shin; Hangseok Choi

doi:10.14481/jkges.2023.24.9.15

All Issue

2023 Vol.24, Issue 9 Preview Page Next Page

Numerical Analysis for Comparing Beam-spring and Continuum Model for Buried Pipes Considering Soil-pipe Interaction 매설관과 지반의 상호작용을 고려한 보-스프링 모델과 연속체 모델의 수치해석적 비교 연구

1 September 2023. pp. 15-24

PDF XML

Abstract

The behavior of buried pipes is directly influenced by the nonlinearity and complex characteristics of the surrounding soil. However, the simplified beam-spring model, which ignores the nonlinearity and complex behavior of soil, is commonly used in practice. In response, several studies have employed continuum analysis methods to account for the nonlinear and complex behavior of the soil. This paper presents various numerical continuum analysis techniques and verifies their comparison with full-scale tests. The study found that reaction force results close to the full-scale test could be obtained by applying contact surface characteristics that take into account the interaction between the ground and the buried pipe. In the case of sharing pipe and soil node method and ignoring the interaction between pipe and soil, excessive reaction force was derived, and the failure shapes were different. In addition, this study applied the dynamic explicit analysis method, ALE method, and CEL method. It was confirmed that the displacement-reaction relationship and failure shape are similar to those of the static analysis.

Keywords

Buried pipe

Beam-spring model

Continuum analysis

Soil-pipe interaction

Static analysis

Dynamic analysis

지중 매설관 거동은 주변 지반의 비선형성과 복합거동 특성의 영향을 직접적으로 받게 되나, 실무에서는 지반의 복잡한 거동 특성을 단순화한 보-스프링 모델이 현재까지도 널리 활용되고 있다. 따라서, 연구 분야에서는 지반의 비선형 특성과 복합거동 특성을 반영하기 위한 연속체해석 방법을 활용하려는 다양한 연구들이 진행되어 왔고, 본 논문에서도 기존에 연구된 다양한 연속체 해석기법을 활용하여 수치해석을 수행하고, 변위-반력 결과 및 지반파괴 형상을 기존 실대형시험 결과와 비교·검토하였다. 지반과 매설관의 상호작용을 적용한 접촉면 특성을 적용한 경우, 실대형시험에 근접한 반력 결과를 도출할 수 있음을 확인하였으며, 실대형시험과 유사한 파괴 형상도 확인하였다. 지반과 매설관의 상호작용을 무시한 매설관과 지반 절점 공유 방법의 경우, 과도한 반력 값을 도출하고, 파괴양상도 상이하였다. 또한, 대변형 해석에서 수렴성이 좋은 동적해석 explicit 방법, ALE 방법, CEL 방법을 각각 적용한 결과, 정적해석과 유사한 변위-반력 관계 및 파괴 형상이 확인되어, 향후 지반분야 대변형 해석에서 동적해석법도 충분히 활용될 수 있을 것으로 판단하였다.

키워드

매설관

보-스프링 모델

연속체 해석

지반-매설관 상호작용

정적해석

동적해석

References

American Lifelines Alliance (ALA) (2001), "Guidelines for the Design of Buried Steel Pipe."

Audibert, J. M. and Nyman, K. J. (1977), "Soil restraint against horizontal motion of pipes", Journal of the Geotechnical Engineering Division, Vol. 103, No. 10, pp. 1119~1142. 10.1061/AJGEB6.0000500

Ban, Hoki, Park, Seong-Wan and Kim, Yong-Rak (2013), "Performance Evaluation of Buried Concrete Pipe under Heavy Traffic Load", Journal of the Korean Geotechnical Society, Vol. 29, No. 12, pp. 69~75. 10.7843/kgs.2013.29.12.69

Burnett, A. (2015), "Investigation of Full Scale Horizontal Pipe-Soil Interaction and Large Strain Behaviour of Sand", M.A.Sc., Queen's University.

Donea, J., Huerta, A., Ponthot, J. and Rodriguez-Ferran, A. (2004), "Arbitrary Lagrangian-Eulerian Methods", In Encyclopedia of Computational Mechanics, N.Y.

Duncan, J. M. and Chang, C. Y. (1970), "Nonlinear analysis of stress and strain in soils", Journal of the soil mechanics and foundations division, Vol. 96, No. 5, pp. 1629~1653. 10.1061/JSFEAQ.0001458

Guo, P. (2005), "Numerical modeling of pipe-soil interaction under oblique loading", Journal of Geotechnical and Geoenvironmental Engineering, Vol. 131, No. 2, pp. 260~268. 10.1061/(ASCE)1090-0241(2005)131:2(260)

Hansen, J. B. (1961), "The ultimate resistance of rigid piles against travsversal forces.", Bulletin 12, Danish Geotechnical Institute, Copenhagen, Denmark, pp. 1~9.

Jung, J. K. (2011), "Soil-pipe interaction under plane strain conditions", Cornell University, Ithaca, N.Y.

Kang, J., Parker, F. and Yoo, C. H. (2007), "Soil-structure interaction and imperfect trench installations for deeply buried concrete pipes", Journal of geotechnical and geoenvironmental engineering, Vol. 133, No. 3, pp. 277~285. 10.1061/(ASCE)1090-0241(2007)133:3(277)

Katona, M. G., Smith, J. M., Odella, R. S. and Allgood, J. R. (1976), CANDE-Engineering Manual-A Modern Approach for Structural Design and Analysis of Buried Culverts, Report FHWA-RD-77-5. FHWA, U.S. Department of Transportation.

Qiu, G., Henke, S. and Grabe, J. (2011), "Application of a Coupled Eulerian-Lagrangian approach on geomechanical problems involving large deformations", Computers and Geotechnics, Vol. 38, No. 1, pp. 30~39. 10.1016/j.compgeo.2010.09.002

Information

Publisher :Korean Geo-Environmental Society
Publisher(Ko) :한국지반환경공학회
Journal Title :Journal of the Korean Geo-Environmental Society
Journal Title(Ko) :한국지반환경공학회 논문집
Volume : 24
No :9
Pages :15-24
Received Date : 2023-06-27
Revised Date : 2023-07-04
Accepted Date : 2023-07-27
DOI :https://doi.org/10.14481/jkges.2023.24.9.15

Journal of the Korean Geo-Environmental Society ISSN:1598-0820(Print) 2714-1233(Online) 한국지반환경공학회 논문집

All Issue