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| Analysis of Technical Problems Related to Longitudinal Slab Ballastless Track on Bridge |
| WANG Qing-bo1, JIANG Zi-qing1, SI Dao-lin2 |
| 1. Engineering Management Center, Ministry of Railways, Beijing 100844, China; 2. China Academy of Railway Sciences, Beijing 100081, China |
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Abstract Research purposes：As the longitudinal ballastless track on bridge and the bridge structure are anchored together, the loading on the system of longitudinal ballastless track on bridge is relatively complicated under the effect of temperature stress and braking force. In this paper, the research is done on the some relative technical problems that more attention should be paid to when making the structural design.
Research conclusions：The temperature stress of the base plate can't be considered when doing checking calculation to the pierbody in straight section, but the stiffness reduction of base plate must be considered, and the temperature stress should be calculated as main force and the braking force should be calculated as additional force. At the same time, the working condition of larger stiffness of base plate must be considered. The temperature stress of the track becomes an internal force on short subgrade between two bridges, and the load on the friction plate is smaller than that with fixation point. The modal analysis shows the opposed-phase vibration of the bridges and track structure becomes one of important reasons for the track flapping the beam.
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Received: 06 April 2010
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2010, Vol. 27 
