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2021 Vol.20, Issue 2 Preview Page

Research Article

Sub-structuring Technique of High-speed Train-bridge Interaction Analysis for Foundation Design

기초 설계를 위한 고속철도 교량-열차 상호작용 해석의 부구조화 기법

Kang-Il Lee1
,
Myung-Kwan Song2*
이 강일1
,
송 명관2*
1Member, Professor, Department of Civil Engineering, Daejin Univ., 11-1 Hoguk-ro, Pocheon-si, Gyeonggi-do 11159, Republic of Korea
2Member, Principal Research Engineer, Ph.D, P.E, PMP, Technology Development Center, Saman Corporation, Hanmac Building, 554 Ogeum-ro, Songpa-gu, Seoul 05774, Republic of Korea
*Corresponding Author
30 June 2021. pp. 35-43
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Abstract

In this paper, the sub-structuring technique-applied train-bridge interaction analysis model, which is formulated based on the simplified three-dimensional train-bridge interaction analysis model for high-speed bridge-train interaction analysis, is presented. In the sub-structuring technique, the super-structure and the supporting structure of railway bridges can be modeled as sub-structures, and train-bridge interaction analysis can be efficiently performed. As a train analysis model, two-dimensional train model is used, and the Lagrange equation of motion is applied to derive the equation of motion of two-dimensional train. In the sub-structuring technique, the number of degrees of freedom can be reduced by using the condensation method, thus reducing the time and cost for calculating the eigenvalues ​​and eigenvectors, and the time and cost for the subsequent calculation. In this paper, Guyan reduction method is used as sub-structuring technique. By combining simplified three-dimensional bridge-train interaction analysis and Guyan reduction method, the efficient and accurate bridge-train interaction analysis can be performed.

Keywords
High-speed train-bridge interaction
Sub-structuring technique
Guyan reduction method

본 논문에서는 고속철도 교량-열차 상호작용 해석을 위한 단순 3 차원 상호작용 해석모델을 기반으로 하여 정식화한 부구조화 기법 적용 상호작용 해석모델을 제시한다. 부구조화 기법에서는 철도 교량의 상부 구조와 지지 구조를 각각 부구조로 모델링하고, 열차-교량 상호작용 해석을 효율적으로 수행할 수 있다. 열차 해석 모델로는 2차원 열차 모델을 사용하고, Lagrange 운동방정식을 적용하여 2차원 열차의 운동방정식을 유도한다. 부구조화 기법에서는 응축 방법을 사용하여 자유도(Degree of freedom)의 수를 줄일 수 있으므로 고유 값 및 고유 벡터 계산을 위한 소요 시간 및 비용과 후속 계산의 소요시간 및 비용이 줄어든다. 본 논문에서는 부구조화 기법으로 Guyan 감소 방법을 사용한다. 단순 3 차원 교량-열차 상호작용 해석과 Guyan 감소 방법을 결합하여 효율적이고 정확한 교량-열차 상호작용 해석을 수행할 수 있다.

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Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 20
  • No :2
  • Pages :35-43
  • Received Date : 2021-05-11
  • Revised Date : 2021-05-26
  • Accepted Date : 2021-06-16
  • DOI :https://doi.org/10.12814/jkgss.2021.20.2.035
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