| Title |
Torsional Behavior of Ballastless Railway Plate Girder Bridge |
| Authors |
현승혁(Hyun, Seung Hyuk) ; 황원섭(Hwang, Won Sub) ; 박성준(Park, Sung Jun) |
| DOI |
https://doi.org/10.12652/Ksce.2021.41.3.0201 |
| Keywords |
철도판형교; 횡방향변위; 비틀림각; 비틀림상수비 Railway plate girder bridge; Lateral displacement; Torsion angle; Torsional constant ratio |
| Abstract |
In this paper, the effect on the lateral and torsional behavior of ballastless railway plate girder bridge by the installation of the lower horizontal bracing has been reviewed. First of all, the most efficient lower bracing arrangement has been reviewed by comparing and examining the lateral displacement due to the train load, targeting analysis models with different arrangement types of lower bracing.
Next, the research on torsional behavior of plate girder bridge with lower bracing has been conducted. In addition, the torsion constant from FEM analysis results has been compared with the torsion constant of a railroad plate girder bridge with a closed section by
substituting the upper and lower horizontal bracing with equivalent thickness. Based on this comparison, the impact on the bridge span length and the cross section area of the lower bracing has been examined. Through this study, the curve graph related to lateral buckling moment and torsional constant ratio is presented and the range of plate girder bridge requiring torsional reinforcement is proposed. |