Verified 20-car Model of High-speed Train for Dynamic Response Analysis of Railway Bridges

검증된 고속철도 차량의 20량편성 정밀모형에 의한 철도교량의 동적응답 분석

  • 최성락 ((재) 한국철도기술공사 구조부) ;
  • 이용선 (연세대학교 토목공학과) ;
  • 김상효 (연세대학교 사회환경시스템공학부) ;
  • 김병석 (한국건설기술연구원 토목연구부 구조시스템그룹)
  • Published : 2002.12.01

Abstract

The aim of this study is to develop a 3-dimensional dynamic analysis model, capable of considering the interaction between vehicles and bridges more accurately. The dynamic analysis model is developed with the high-speed train (KTX) and a 2-span continuous prestressed concrete box girder bridge with a double track. The 20-car model is developed using the moving vehicle model for the regular trainset. Three-dimensional frame elements are used for the bridge model. Using the developed models, a dynamic behavior analysis program is coded. The analytical results are compared with the dynamic field test results and found to be valid to yield quite accurate dynamic responses. Based on the results of this study, the hybrid model, made up of the moving vehicle model for the heaviest power car and the moving force model for the other cars, is quite simple and effective without loosing the accuracy that much. Under the coincidence condition of two trains traveling with resonance velocity in the opposite directions, it is necessary to check not only the dynamic responses of the bridge with one-way traffic but those with two- way coincidence.

References

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