This research analyzed dynamic responses of the preflex railroad bridge. Vertical deflection and acceleration induced by operating train loads and test train loads were measured. Deflection of bridge by train traveling satisfies deflection limitation regulation (L/800) about the concrete bridge, but compare with UIC standard, vibration acceleration happened fairly greatly. Also test result show that acceleration receives greatly effect about the speed than deflection. It must discuss about vibration acceleration problems for speed elevation hereafter.

• 오지택(한국철도기술연구원 구조물동특성 연구그룹 선임연구원) | Oh, Ji-Taek
• 김현민( 한국철도기술연구원 구조물동특성연구그룹 주임연구원) | 김현민
• 최은수( 한국철도기술연구원 구조물동특성연구그룹 선임연구원) | 최은수
• 김주우( 세명대학교 건축공학과, 조교수) | 김주우