Dynamic Behavior and Resonance Reduction of Two-Span Continuous Bridges for Korean Train eXpress

KTX용 2경간 연속교량의 동적거동 및 공진감소

  • 오주원 (한남대학교 공과대학 토목환경공학과)
  • Received : 2007.08.28
  • Accepted : 2007.12.04
  • Published : 2008.01.31

Abstract

Dynamic behaviors of the two-span continuous bridge which is one of prototypes on Gyoung-Bu high-speed railway are analyzed and some methods for reducing the resonance of the bridge are proposed. The bridge is modeled as a two-span continuous beam and the load is a vehicle of TGV-K (2p+18T) with length of 380.15 meter traveling on the railway bridge at some constant velocity. The equations governing the dynamic behaviors of the bridge are partial differential equations produced by using a system with distributed mass and elasticity. The analysis of the governing equations is performed by the mode superposition method which has modal coordinates solved by Duhamel's integral. Without considering the train velocity the dynamic reponses can be greatly reduced at some special lengths of bridge. It is different from the results of simple bridges researched so far. When the dynamic responses increase rapidly to make a resonance phenomenon depending on the train velocities, the several methods are proposed to deduce the resonance.

Acknowledgement

Supported by : 한남대학교

References

  1. 곽종원(1996) 특집기사 : 강구조의 진동/고속전철 교량의 동적 거동에 관한 고찰, 한국강구조학회지, 한국강구조학회, Vol. 8, No. 4, pp. 36-40
  2. 곽종원, 진원종, 김영진, 김병석(2003) 경부고속철도 주행에 의한 콘크리트 상자형 교량의 동적거동, 대한토목학회논문집, 대한 토목학회, 제23권 제1A호, pp. 27-36
  3. 김성일, 정원석, 최은수(2005) 공진소멸 현상을 이용한 기존선 철도교량의 지간 최적화를 위한 연구, 한국철도학회논문집, 한국철도학회, Vol. 8, No. 2, pp. 137-144
  4. 안예준, 김성재, 신영석(2000) 고속철도 교량의 동적거동, 대한토목학회논문집, 대한토목학회, 제20권 제3A호, pp. 375-384
  5. 오종환, 김연태(2005) TMD를 이용한 고속철도교량의 진동감소 에 관한 연구, 한국철도학회 2005년도 추계학술대회논문집, 한국철도학회, pp. 141-147
  6. 장승필, 곽종원, 하길상, 김성일(1998) 고속열차하중 하의 강합성 형 철도교의 진동, 한국강구조학회논문집, 한국강구조학회, Vol. 10, No. 4, pp. 577-587
  7. 최은석, 진원종, 이정우, 곽종원, 강재윤, 김병석(2006) 고속철도 교량의 진동저감. 한국철도학회 논문집, 한국철도학회, 제9권 제1호, pp. 125-130
  8. Yang, Y.B. and Yau, J.D., and Hsu, L.C. (1997) vibration of simple beams due to trains moving at high speeds, Engineering Structures, Elsevier, Vol. 19, No. 11, pp. 936-944 https://doi.org/10.1016/S0141-0296(97)00001-1