International Journal of Highway Engineering (한국도로학회논문집)

Korean Society of Road Engineers (한국도로학회)
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Analysis of Aggregate Base Behavior Using Layered Elastic and Finite Element Methods

다층탄성해석과 유한요소법을 사용한 골재기층의 거동분석

  • 김성희 (미국 Southern Polytechnic State University 공과대학 건설공학과)
  • Published : 2009.03.15
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Abstract

In this paper, the critical strains for pavement design were calculated from both Layered Elastic Program (LEP) and Finite Element Method (FEM) and the case studies which give similar critical responses were compared. Although FEM has been realized as a superior model, LEP is more favorable to pavement design due to its simplicity and thus, the technique to calculate the correct critical responses using LEP is significant. This study showed that KENLAYER can possibly estimate the critical responses close to ones obtained from TTIPAVE, which considers nonlinear cross-anisotropic behavior of unbound base materials, by adjusting the stress point locations.

이 논문에서는 다층탄성해석과 유한요소법을 사용하여 도로설계를 위한 도로내 주요 변형률을 계산하여 유사한 결과치를 양산하는 경우를 비교 분석하였다. 비록 유한요소법이 보다 나은 모델이라는 것이 입증되긴 했지만, 다층탄성해석 프로그램이 간편성으로 인해 여전히 도로설계를 위해 많이 사용되어 지고 있으므로 다층탄성해석 프로그램을 사용한 주요 변형률의 예측이 시급한 실정이다. 이 연구에서는 KENLAYER프로그램을 사용하여, 비선형 이방성 기층거동을 고려한 유한요소법을 사용했을 때 얻어지는 도로내 주요 변형을 예측할 수 있는 분석기법이 소개된다.

Keywords

References

  1. Adu-Osei, A., Little, D. N., and Lytton, R. L. (2000). "Structural Characteristics of Unbound Aggregate Bases to Meet AASHTO 2002 Design Requirements." Interim Report, International Center for Aggregate Research (ICAR) Project 502, Texas Transportation Institute, Texas A&M University, College Station, TX, July.
  2. Huang, Y. H.(1993), "Pavement Analysis and Design", 1st Edition, Prentice Hall, Englewood Cliffs, NJ.
  3. Kim, S.H. (2004). "Determination of Aggregate Physical Properties and Its Effect on Cross-Anisotropic Behavior of Unbound Aggregate Materials." Ph.D. Dissertation, Texas A&M University, College Station, TX.
  4. Kim, S. H., Little, D. N., and Masad, E. (2005). "Simple Methods to Estimate Inherent and Stress-Induced Anisotropic Level of Aggregate Base." Transportation Research Record 1913, TRB, National Research Council, Washington D.C, 24-31.
  5. Kim, S. H., Little, D.N., Masad, E., and Lyton, R. L. (2005). "Estimation of Level of Anisotropy of Unbound Granular Layer Considering Aggregate Physical Properties." International Journal of Pavement Engineering, Volume 6, Number 4, 217-227. https://doi.org/10.1080/10298430500335244
  6. Kim, S. H., Tutumluer, E., Little, D. N., Kim, N. (2007), "Effect of Gradation on Nonlinear Stress-Dependent Behavior of a Sandy Flexible Pavement Sub grade" Journal of Transportation Engineering, American Society of Civil Engineering, Vol. 133, No. 10, Oct 1, 2007.
  7. Kim, S. H., Kim, N. (2007), "Micromechanics Analysis of Granular Soils to Estimate Inherent Anisotropy" Journal of Highway Engineering, Korean Society of Civil Engineers, Vol. 11, No. 3. May 2007, pp.145-149.
  8. Tseng, K. H., and Lytton, R. L. (1989) "Prediction of permanent deformation in flexible pavement materials", Journal of AAPT, Vol. 58, pp. 155-156.
  9. Tutumluer, E., Little, D.N., and Kim, S.H. (2003), "A Validated Model for Predicting Field Performance of Aggregate Base Courses", Transportation Research Record 1837, TRB, National Research Council, Washington, DC, pp. 41-49.