Extradosed PSC 철도교의 지점조건에 따른 동적거동 분석

When the train passes though river and valley on plan of railway route, it is acquired that a span of railway bridge should be considered as a long span. Up to now, the truss bridge and the arch bridge have been used as a long span railway bridge. Relatively, Extradosed PSC Bridge has several features such as small stiffness and flexible structure which take bad effect on running stability, and ride comfort. However, through continuous study on light weight of superstructure and the long span bridge, Extradosed PSC Bridge has recently been introduces as a railway bridge. In addition, in order to investigate the dynamic effect according to support condition of Extradosed PSC Bridge, This paper performs the time history analysis about the type of frame bride in which a part of pylon and girder connected each other as a monolithic structure and the type of disassembly structure in which the superstructure and substructure connected each other as a bridge abutment. Therefore, this study suggests the type of optimal structure to analyze the dynamic behavior according to support condition of Extradosed PSC Bridge.