Journal
VEHICLE SYSTEM DYNAMICS
Volume 61, Issue 10, Pages 2613-2637Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00423114.2022.2124178
Keywords
High-speed railway; high piers; train-track-bridge interaction; longitudinal vibration; spatial flexibility; train braking
Categories
Ask authors/readers for more resources
In this study, a 3D train-slab track-high pier bridge coupled dynamics model was established and verified, considering the spatial flexibility of high piers. The results show that the operation speed has a significant impact on carbody acceleration and wheel-rail force.
High-pier railway bridges are mostly applied in mountainous areas. Due to the large spatial flexibility of the high piers under train dynamic loads, especially under braking conditions, the wheel-rail (WR) dynamic interaction may become more intense in the longitudinal direction, which could induce larger deformation and impact on the train-track-bridge (TTB) coupled system. To investigate the dynamic characteristics of such complex and large system during train braking condition, a 3D train-slab track-high pier bridge (TTHPB) coupled dynamics model is established and verified by considering the system longitudinal vibrations and the spatial flexibility of high piers. In this work, the influence of concerned bridge height from 60 to 160 m on the dynamic performances of the TTHPB system under train braking condition is studied. Results indicate that the operation speed has a significant effect on carbody acceleration and WR force. The longitudinal carbody acceleration due to its high-frequency vibration, as well as its noticeable amplitude induced by the long-time frequent braking, should be carefully considered in the evaluation of riding comfort index. The longitudinal dynamic behaviour of the high pier bridge is considerable and should be paid full attention to in bridge design compared with the other two directions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available