Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
권호 표지

Implementation of DSC Model for Clay-pile Interface Under Dynamic Load

동하중을 받는 점토-파일 접촉면 거동모사를 위한 DSC 모델의 수치해석적 이용

  • Published : 2003.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

The Disturbed State Concept (DSC) model, with simplified unloading/reloading formulation, is implemented in a nonlinear dynamic finite element program fur porous media named DSC_DYN2D. In this research, the DSC constitutive model is utilized using the HiSS model for relative intact (RI) part and the critical state model for the fully adjusted (FA) part in the material. The general formulation for implementation is developed. The cyclic loading tests from the field load test data on a pile segment were numerically simulated using the finite element program DSC_DYN2D and compared with field measurements and those from the previous analysis with the HiSS model. The DSC predictions show improved agreement with the field behavior of the pile compared to those from the HiSS model. Overall, the computer procedure with the DSC model allows improved and realistic simulation of the complex dynamic soil-structure interaction problems.

간단한 제하/재재하 구성방정식을 이용하여 기존의 교란상태개념(DSC)모델을 수정하였고, 그 수정된 DSC모델을 비선형 동역학적 유한요소 프로그램인 DSC_DYN2D에 수치해석적으로 접목(implementation)하였다. 본 연구에서 이용한 구성방정식 DSC 모델은 상대적으로 손상받지 않은 상태(RI)를 정의하기 위하여 HiSS모델을 이용하였고, 완전파괴상태(FA)는 한계상태모델을 이용하였다. 이렇게 수정된 DSC_DYN2D 프로그램을 이용하여 동하중을 받는 현장파일 및 그 주변 지반의 거동을 수치해석적으로 모사 하였다. 해석 결과를 기존의 HiSS모델을 이용한 해석결과와 비교, 분석하였다. 비교결과, DSC모델을 이용하여 해석한 결과가 HiSS모델로 해석한 결과보다 현장계측과 유사하였다. 이를 통해 DSC모델을 이용한 수치해석이 복잡한 점토-파일 접촉면 상호작용 거동을 실제적으로 잘 모사할 수 있다고 판단된다.

Keywords

References

  1. Journal of the Mech. Behavior of Materials v.5 no.3 Modeling and testing of cohesionless material using disturbed state concept Armaleh,S.H.;Desai,C.S.
  2. Finite element procedures in engineering analysis Bathe,K.J.
  3. Elementary finite element method Desai,C.S.
  4. Report, Department of Civil Engineering and Engineering Mechanics, University of Arizona The disturbed state as a phase transformation through self-adjustment concept for modeling of mechanial response of materials and interface Desai,C.S.
  5. Int. J. Num. Analyt. Meth. in Geomech. v.16 no.9 Modeling of joints and interfaces using the disturbed state concept Desai,C.S.;Ma,Y. https://doi.org/10.1002/nag.1610160903
  6. Short Course Notes, 2nd Int. Conf. on Constitutive Laws for Engineering Materials:Theory and applications Hierachical and unified models for solids and discontinuities(Joints/Interfaces) Desai,C.S.;Wathugala,G.W.
  7. Introduction of continuum damage mechanics Kachanov,L.M.
  8. Report, Department of Civil Engineering and Engineering Mechanics, University of Arizona Modeling including associated testing of cohesive soils using the disturbed state concept Katti,D.R.;Desai,C.S.
  9. Journal of Engrg. Mech. v.121 no.5 Modeling and testing of cohesive soils using the disturbed state concept Katti,D.R.;Desai,C.S. https://doi.org/10.1061/(ASCE)0733-9399(1995)121:5(648)
  10. Ph.D. Dissertation, University of Arizona Distrubed state concept for rock joints Ma,Y.
  11. Ph.D. Dissertation, University of Arizona Disturbed state modeling for dynamic and liquefaction analysis Park,I.J.
  12. Journal of Geotechnical and Geoenvironmental Engineering. ASCE v.126 no.9 Cyclic Behavior and Liquefaction of Sand Using Disturbed State Concept Park,I.J.;Desai,C.S. https://doi.org/10.1061/(ASCE)1090-0241(2000)126:9(834)
  13. Int. J. Num. Analyt. Meth. in Geomech. v.9 no.2 A critical assessment of methods of correcting for drift from the yield surface in elasto-plastic finite element analysis Potts,D.M.;Gens,A. https://doi.org/10.1002/nag.1610090204
  14. Reprot, University of Arizona Testing and constiutive modeling of saturated interfaces in dynamic soil-structure interaction Rigby,D.B.;Desai,C.S.
  15. Ph.D. Dissertation, Unversity of Arizona Finite element dynamic analysis of nonlinear porous media with application to piles in saturated clays Wathugala,G.W.
  16. Proc. 21st Offshore Technology Conference An analysis of piles in marine clay under cyclic axial loading Wathugala,G.W.;Desai,C.S.
  17. Report, University of Arizona Finite element dynamic analysis of nonlinear porous media with application to piles in saturated clays Wathugala,G.W.;Desai,C.S.