[미발표]유지관리를 고려한 장경간 무도상강철도교의 레일장대화 방안연구

The long rail system is applied in the high speed railway bridges and urban long span railway bridges because it is beneficial to serviceability and maintenance of the structure. But this application has been limited in the long span non ballast railway bridges because of the axial force increase, bukcling and maintenance problems. However, with the long rail system, the seismic behavior of the bridge system shall be miproved and fatigue life of the bridge members also would be extended due to the reduction of impact loadings. In this study, the application of long rail system in the non ballast steel railway bridges was studied and the practical application methods were proposed. Also the structural safety were compared and the practical maintenance methodology was proposed.