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민경주(Min Kyung-Joo),반걸용(Ban Geol-Yeong),김영국(Kim Yung-Gook) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
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.
민경주(Min Kyung-Joo),남보현(Nam Bo-Hyun),반걸용(Ban Geol yeong) 한국철도학회 2005 한국철도학회 학술발표대회논문집 Vol.- No.-
From the using CWR (Continuously Welded Rail) on steel plate girder bridges without ballast, axial forces are occurred from a temperature on CWR and girders. Because of the additional axial forces, studies in order to CWR and developments of devices are proceeding. The track system of steel plate girder bridges is poor. When CWR is used for the system, the resistance on sleepers is increased from a temperature. So it is increasing an effect on CWR and, for solving the effect, longitudinal forces for buckle are being decreased. It is possible that opposite cases can be happened and it is also compared and studied. Therefore, we present a reasonable model for analyzing CWR within the property of steel plate girder railway bridges in Korea. Furthermore, the results analyzed for stability is compared and evaluated with tests. Finally, a reasonable method for the installation of CWR on bridges without ballast is suggested.