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Numerical Analyses on Moment Resisting Behaviors of Electric Pole Foundations According to Their Shapes

기초형상에 따른 전철주기초 모멘트 저항거동에 관한 수치해석 연구

Su-Hyung Lee1*
이 수형1*
1Senior Researcher, Korea Railroad Research Institute
1한국철도기술연구원 광역도시교통연구본부 선임연구원
*교신저자. *Corresponding Author. 
30 November 2013. pp. 85-97
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Abstract

Electric pole foundations for overhead catenary system of railroad should be designed so that they may resist significant overturning moment but relatively small vertical forces. Also they should have proper shapes to be installed at restricted narrow areas adjacent to railroad track. In this paper the moment responses of rectangular pole foundations according to their shapes were investigated numerically. A three-dimensional finite element method was developed and verified so that the numerical behaviors of the foundation resisting the overturning moments were compared reasonably well with those from an existing real-scale load test. The influences of aspect ratio, varying section with depth and loading directions for rectangular section were investigated using the developed numerical method. From the numerical results, the optimized shapes of pole foundation for more effective and economic installation adjacent to railroad track are proposed.

Keywords
Electric pole foundation, Railroad
3D finite element method
Foundation shape
Moment capacity

가공 전철선의 지지를 위하여 철도선로에 근접하여 설치되는 전철주기초는 풍하중에 의한 매우 큰 전도 모멘트에 저항하도록 설계되어야 하며 동시에 철도선로 인근의 좁은 공간에 설치될 수 있는 형상을 가져야 한다. 본 논문에서는 수치해석을 통해 전철주기초의 형상에 따른 모멘트 저항거동을 평가하였다. 전도에 저항하는 전철주기초의 거동 특성을 모사할 수 있는 3차원 유한요소해석기법을 개발하였으며, 해석결과를 기존의 실물 재하시험 결과와 비교하여 그 유효성을 확인하였다. 세장비, 깊이에 따른 단면 변화, 직사각형 단면의 하중재하 방향 등을 변화시킨 다양한 조건의 기초에 대하여 모멘트 저항거동을 분석하였으며, 그 결과를 이용하여 철도선로에 근접하여 보다 효율적이고 경제적으로 시공이 가능한 전철주기초 형상을 제시하였다.

References
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Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 29
  • No :11
  • Pages :85-97
  • Received Date : 2013-08-06
  • Revised Date : 2013-10-01
  • Accepted Date : 2013-11-07
  • DOI :https://doi.org/10.7843/kgs.2013.29.11.85
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