한국지진공학회논문집 (Journal of the Earthquake Engineering Society of Korea)

  • 제21권5호
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  • Pages.255-264
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  • 2017
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  • 1226-525X(pISSN)
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  • 2234-1099(eISSN)
한국지진공학회 (Earthquake Engineering Society of Korea)
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3차원 수치해석을 통한 궤도지지말뚝의 동적거동 평가

Evaluation of Dynamic Behavior for Pile-Supported Slab Track System by 3D Numerical Analysis

  • 유민택 (한국철도기술연구원 고속철도 연구본부 첨단인프라연구팀) ;
  • 백민철 (한국철도기술연구원 고속철도 연구본부 첨단인프라연구팀) ;
  • 이일화 (한국철도기술연구원 고속철도 연구본부 첨단인프라연구팀) ;
  • 이진선 (원광대학교 토목환경공학과)
  • Yoo, Mintaek (Advanced Infrastructure Research Team, High-speed Railroad System Research Center, Korea Railroad Research Institute) ;
  • Back, Mincheol (Advanced Infrastructure Research Team, High-speed Railroad System Research Center, Korea Railroad Research Institute) ;
  • Lee, Ilhwa (Advanced Infrastructure Research Team, High-speed Railroad System Research Center, Korea Railroad Research Institute) ;
  • Lee, Jinsun (Department of Civil and Environmental Engineering, Wonkwang University)
  • 투고 : 2017.03.10
  • 심사 : 2017.08.01
  • 발행 : 2017.09.01
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초록

Dynamic numerical simulation of pile-supported slab track system embedded in a soft soil and embankment was performed. 3D model was formulated in a time domain to consider the non-linearity of soil by utilizing FLAC 3D, which is a finite difference method program. Soil non-linearity was simulated by adopting the hysteric damping model and liner elements, which could consider soil-pile interface. The long period seismic loads, Hachinohe type strong motions, were applied for estimating seismic respose of the system, Parametric study was carried out by changing subsoil layer profile, embankment height and seismic loading conditions. The most of horizontal permanent displacement was initiated by slope failure. Increase of the embedded height and thickness of the soft soil layer leads increase of member forces of PHC piles; bending moment, and axial force. Finally, basic guidelines for designing pile-supported slab track system under seismic loading are recommended based on the analysis results.

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