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3D Dynamic Finite Element Analysis and Corresponding Vibration of Asphalt Track Considering Material Characteristics and Design Thickness of Asphalt Concrete Roadbed Under Moving Load

아스팔트 콘크리트 설계두께 및 재료특성을 반영한 아스팔트 콘크리트 궤도 3차원 이동하중 동적해석 및 진동특성

  • Lee, SeongHyeok (Advanced Infrastructure Research Team, Korea Railroad Research Institute) ;
  • Seo, HyunSu (Dept. Civil Engineering, Gyeongsang National University) ;
  • Jung, WooYoung (Dept. Civil Engineering, Gangneung-Wonju National University)
  • Received : 2015.11.16
  • Accepted : 2016.01.13
  • Published : 2016.02.29

Abstract

The asphalt-concrete trackbed system has many advantages in terms of maintenance and economics. However, methods to investigate practical use corresponding to the development of the trackbed system must be developed. The primary objective of this study was to evaluate the dynamic performance of the asphalt system in accordance with both the elastic and viscoelastic material characteristics and design thickness of the asphalt trackbed. More specifically, in order to reduce the uncertainty error of the Finite Element(FE) model, a three-dimensional full scale FE model was developed and then the infinite foundation model was considered. Finally, to compare the condition of viscoelastic materials, performance evaluation of the asphalt-concrete trackbed system was used to deal with the dynamic amplification factors; numerical results using isotropic-elastic materials in the FE analysis are presented.

Acknowledgement

Supported by : 한국철도기술연구원

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