Optimum Design of High-Speed Railway Bridges Considering Bridge-Rail Longitudinal Interaction and Moving Load Effect

교량-궤도 종방향 상호작용 및 동적영향을 고려한 고속철도 교량의 최적설계

  • Received : 2010.11.10
  • Accepted : 2010.11.29
  • Published : 2010.12.31

Abstract

Recently, high-speed railway systems have gained increased interest as a means of environmental friendly transportation, and numerous bridges for high-speed railways have been constructed accordingly. However, bridge design for high-speed railways requires more consideration than conventional railway design because fast-moving trains will lead to significant impact on bridge structures. Thus, this research proposes a revised design considering both bridge-rail longitudinal interaction and dynamic effect of trains to ensure stability of fast travelling trains. To validate the proposed design algorithm, numerical analyses are performed and compared using a constructed 250 m long bridge with 5 spans for a high-speed railway. From the numerical results, the proposed optimum design of high-speed railway bridges exhibits the most economic life-cycle-cost (LCC) when compared with several existing design approaches.

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