- Volume 19 Issue 3
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Design Graphs for Asphalt Concrete Track with Wide Sleepers Using Performance Parameters
성능요소를 반영한 광폭 침목형 아스팔트콘크리트 궤도 설계그래프
Lee, SeongHyeok;Lim, Yujin;Song, Geunwoo;Cho, Hojin
- Received : 2015.11.09
- Accepted : 2016.03.21
- Published : 2016.06.30
Wheel load, design velocity, traffic amount (MGT), stiffness and thickness of sub-layers of asphalt concrete track are selected as performance design parameters in this study. A pseudo-static wheel load computed considering the dynamic amplification factor (DAF) based on the design velocity of the KTX was applied to the top of asphalt concrete track for full three dimensional structural analysis using the ABAQUS program. Tensile strains at the bottom of the asphalt concrete layer and vertical strains at the top of the subgrade were computed from the structural FEA with different combinations of performance parameter values for one asphalt concrete track section. Utilizing the computed structural analysis results such as the tensile strains and the vertical strains, it was possible to develop design graphs to investigate proper track sections for different combination of the performance parameters including wheel load, design velocity, traffic amount(MGT), stiffness and thickness of asphalt concrete layers for any given design life. By analyzing the proposed design graphs for asphalt concrete track, it was possible to propose simple design tables that can be used by engineers for the effective and fast design of track.
Asphalt ballasted track;Design graph;Performance Parameters;Finite element analysis;wide concrete sleeper
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Supported by : 국토교통부