A Study of Estimation of Damping Ratio for Railway Bridges

철도교량의 감쇠비 추정에 관한 연구

  • 윤혜진 (한국건설기술연구원, 구조교량연구실) ;
  • 진원종 (한국건설기술연구원, 구조교량연구실) ;
  • 최은석 (한국건설기술연구원, 구조교량연구실) ;
  • 강재윤 (한국건설기술연구원, 구조교량연구실) ;
  • 곽종원 (한국건설기술연구원, 구조교량연구실) ;
  • 김병석 (한국건설기술연구원, 기반시설연구본부)
  • Published : 2011.10.20

Abstract

Dynamic response is an important consideration because of the possibility of resonance according to KTX running over a railway bridges. When KTX runs over the bridge at critical speed, dynamic response is very depending on damping ratio. Current damping ratio for design of high-speed railway bridges adopted EUROCODE without verification of domestic railway bridges. The purpose of this study is to obtain the coherent damping ratio of high-speed railway bridges. Free vibration signal after KTX runs over a high-speed railway bridge was applied. The representative value from distribution of damping ratio was considered.

Keywords