무도상 연속 강철교량의 레일장대화에 관한 연구

The additional rail axial force due to temperature change in the ballastless long span bridge with CWR may be higher than common simply supported plate girder bridges. This higher axial force will increase track maintenance costs. In this study, CWR policies of existing long span railway bridges, especially truss bridges, are studied for various supporting condition of bridge such as combination of roller, hinge and semi-fixed supporting conditions. In several numerical tests show that the use of semi-fixed shoes is effective in decreasing rail axial forces and seismic response of bridges. It is expected that the continuous welded track in ballastless long span bridge will increase riding quality of train and decrease maintenance costs and vibrations and noises.