Seismic Response of CWR on HSR Bridge Considering Derailment Inducing Factors

탈선취약요소를 고려한 고속철도교량 장대레일 지진응답 평가

  • 이장석 (현대건설 기술연구소) ;
  • 김대상 (한국철도기술연구원 차륜궤도연구실)
  • Published : 2009.06.30


n the event of an earthquake, additional stresses can occur in the continuous welded rails (CWR) of High-speed railway (HSR) bridges due to relative displacements at expansion joints, and this stress can cause derailment. The amplification of ground motion occurs as a result of site effects, and this is pronounced at the site of a soft surface soil layer and of a rigid surface soil layer over a soft one. As a result, the amplified ground motion leads to an amplified seismic response in HSR bridges. A change in bridge pier height affects the seismic behavior of the bridge. A HSR bridge with gravel ballast tracks will show different dynamic behavior during an earthquake than one with concrete ballast tracks. The seismic responses of HSR bridges and their CWR are analyzed considering the derailment-inducing factors.


CWR;HSR bridge;Derailment;Seismic response;Site effects


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