Geotechnical Engineering (한국지반공학회지:지반)

Korean Geotechnical Society (한국지반공학회)
권호 표지

A Large Slipping Finite Element Model for Geosynthetics Interface Modeling

  • Published : 1996.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

Reinforced soil structures may experience large local movements between soil and reinforcement. The failure modes of a reinforced structure depend on several factors which are governed by deformation and slipping of the reinforcement. In some cases, pulling out of the reinforcement may occur instead of rupturing, The growing use of geosynthetic liner system for storage of solid and liquid wastes has led to a number of slope instability problems where the synthetic liner may undergo a large amount of stretching and slipping as a result of the loading. The conventional finite element model for the soil-reinforcement interface uses a zero thickness joint element with normal and shear stiffnesses and can only accommodate a small amount of deformation. When a large slippage occurs, the model provides an i ncorrect mechanism for deformation. This paper presents a new interface finite element model which is able to simulate a large amount of slippage between soil and reinforcement. The formulation of the model is presented and the capability of the model is demonstrated using illustrative examples.

보강토구조물은 흙과 보강재 사이에 큰 변형이 발생하며 보강토구조물의 파괴양상도 보강재의 미끄러짐이나 변형에 의해 지배되며, 때때로 보강재의 재료의 파괴보다는 미끄러짐에 의해 보강토구조물이 파괴되므로 큰변형이 발생하는 흙-보강재의 모델링이 필요하다. 고형 및 액체폐기물 매립장에 쓰이는 라인너 시스템은 매립장의 경사와 쓰레기하중에 의해 큰 변형이 발생하게 된다. 이러한 큰 변형의 문제는 기존의 접촉요소로써 모델링하는데 많은 제약 이 따른다. 본 논문에서는 이러한 흙과 토목섬유보강사이의 큰 만행을 모델링할 수 있는 접촉은소를 제안하였으며, 그 이론과 그 모델의 적용성에 대하여 논하였다.

Keywords

References

  1. Proc. 2nd Int. Conf. on Geotextiles v.3 The Finit Element Method of Analysis Applied to Soil-geotextile Andrews,K.Z.;McGown,A.;Wilson-Fahmy,R.F.;Mashhour,M.M.
  2. Finite Element Procedures in Engineering Analysis Bathe,K.J.
  3. Journal for Numerical Methods in Engineering v.21 A Solution Method for Planar and Axisymmetric Contact Problems Bathe,K.J.;Chaudhary,A.
  4. Proc. Geosynthetics '93 Conference v.2 An Interpretation of the Pull-Out Test Chan,D.H.;Yi,C.T.;Scott,J.D.
  5. M.Sc. Thesis, The University of Alberta, Edmonton Geogrid Pull-out test in Clay Costalonga,M.A.R.
  6. International Journal for Numerical and Analytical Methods in Geomechanics v.8 Thin-layer Element for Interfaces and Joints Desai,C.S.;Zaman,M.M.
  7. Proceeding of the Fourth International Conference on Geotextiles Geomembrane and Related Product Direct Shear and Pull-out Resistance at the Geotextile Interface Garbalewski,K.
  8. Com. and Geotech. v.7 An Interface Element Formulation for The Analysis of Soil Reinforcement Interaction Gens,A.;Caro,I.;Alonso,E.E.
  9. Journal of Soil Mechanics and Foundation Engineering Division v.94 no.SM 3 A Model for the Mechanics of Jointed Rock Goodman,R.E.;Taylor,R.L.;Brekke,T.L.
  10. J. Eng. Mech. v.104 Finite Element Analysis of Contact Problems Herrmann,L.R.
  11. Methematical Methods of Physics Matthew,J.;Walker,R.L.
  12. J. Eng. Mech. v.118 no.12 Analysis and Implementation of Thin-layer Element for Interface and Joints Sharnia,K.G.;Desai,C.S.
  13. Pro. Int. Symop. on Earth Reinforcement Practice v.2 Discussions: Embankment Wu,J.T.H.