신형식 철도교량 개발 현황 및 전망

초록

The new type of railway bridges are needed to cope with increase of railway construction, the appearance of new train and the lack of adequate type of the bridge for medium span. However, heavy load of the train, demand for more stability as railway, repeated action of the high speed train and high request for passenger comforts should be considered in developing and design of new railway bridges. According to the modern design trend, these newly developed bridges may have considerable advantages in terms of weight, while presenting the capability of creating longer spans. However, the dynamic interaction between bridge superstructures and passing trains is one of the critical issues concerning these railway bridges that have been designed with more flexibility. In the present paper, newly developed various PSC girder bridges and steel-concrete composite girder bridges in Korea will be introduced. Through static and dynamic performance estimation, these bridges which are already used in roadway are trying to be applied in railway.