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Analysis of Dynamic Behavior of Railway Bridge with Concrete Track

콘크리트궤도 부설 철도교량의 동적거동 분석

  • 민낙기 (서울과학기술대학교 철도전문대학원) ;
  • 성덕룡 (대원대학교 철도건설과) ;
  • 박용걸 (서울과학기술대학교 철도전문대학원)
  • Received : 2012.01.06
  • Accepted : 2012.02.27
  • Published : 2012.04.30

Abstract

Precise estimation f a structure's dynamic characteristics is indispensable for ensuring stable dynamic response during life time especially for the structures which can experience resonance such as railway bridges. Especially, concrete track can change the modal properties of the railway bridge, through the contribution of stiffness as well as mass effects, generally only the mass effect is considered in dynamic analysis of the railway bridge. In this paper, static and dynamic behaviors of railway bridge with concrete track were investigated through experimental study. Also, numerical analysis was performed about considering only mass of concrete track and together with stiffness and mass of concrete track. These were compared with experiment value. Numerical analysis value considering together with stiffness and mass of concrete track was similar experiment value. Therefore, when dynamic analysis of railway bridge with concrete track is performed, the contribution of stiffness as well as mass effects for concrete track is considered.

철도교량과 같이 주기적 가진에 의해 공진발생의 가능성이 높은 구조물에 있어서, 정확한 구조물의 동적거동 분석은 설계단계 및 공용중 안정적인 응답을 확보하기 위해 필수적이다. 특히, 콘크리트궤도는 강성기여와 질량기여를 통해 철도교량의 동특성을 변화시킬 수 있음에도 불구하고 일반적으로 철도교량 동적해석 시 질량으로만 고려되어진다. 본 연구에서는 실제 콘크리트궤도가 부설된 거더시험체를 제작하여 철도교량의 정 동적거동을 분석하였다. 또한, 궤도질량만을 고려한 경우와 궤도강성을 고려한 수치해석을 통해 중립축 위치와 고유진동수를 실험치와 비교 분석하였다. 이를 통해 콘크리트궤도 부설 철도교량의 경우 정량적인 산정이 가능한 콘크리트궤도의 강성과 질량을 고려한 해석값이 실험값과 근사한 결과를 얻을 수 있음을 확인하였다. 따라서 본 연구에서는 콘크리트궤도 부설 철도교량에 대한 동적설계 및 동적안정성 분석 시 콘크리트궤도의 강성과 질량을 함께 고려할 것을 제안하였다.

Keywords

References

  1. Korea Rail Network Authority (2005) Railway Construction Rule, Korea Railroad Research Institute.
  2. D.Y. Sung, Y.G. Park, J.Y. Choi, S.I. Kim (2010) The Experimental Study on the Effect of Track System on the Integral Behavior of Railway Bridge, Journal of the Korean Society for Railway, 13(2), pp. 172-179.
  3. M. Sogaba, N. Matsumoto, M. Kanamori, M. Sato, H. Wakui (2005) Impact factors of concrete girders coping with train speed-up, Quarterly Report of RTRI, 46(1), pp. 46-52. https://doi.org/10.2219/rtriqr.46.46
  4. S.P. Chang, J.W. Kwark, S.G. Ha, S.I. Kim (1998) A Study on the Dynamic Behavior of Steel Composite Railway Bridges subject to High Speed Train, 98' Spring Conference of the Society for Railway, pp. 548-555.
  5. S.I. Kim (2010) Experimental Evaluations of Track Structure Effects on Dynamic Properties of Railway Bridge, Journal of Vibration and Control.
  6. Korea Rail Network Authority (2008) A Study on Dynamic Stability and Dynamic Design Standards for Railway Bridge, Korea Railroad Research Institute.
  7. S.I. Kim, J.W. Lee, P.G. Lee, C.E. Kim (2010) Comparison of Measured Natural Frequencies of a Railway Bridge Specimen between Different Excitation Methods, Journal of the Korean Society of Civil Engineers, 30(6A), pp. 535-542.

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