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Effects of CRTS II Slab Ballastless Track on the Seismic Responses of a High-Speed Railway Continuous Girder Bridge
As for a 48+80+48 m prestressed concrete continuous girder bridge with CRTS II slab ballastless track on a high-speed railway, a finite element model integrating the rail-track system and the bridge structure system as well as a trackless-bridge model was built by using SAP2000. The effects of the track structure on the seismic responses of bridge were analyzed through dynamic characteristic analysis and nonlinear time history analysis. The results show that the track structure can increase the structural stiffness, and changes the type and order of natural vibration modes. Before bearings are damaged, the track structure can reduce the deformation of bearings at the bridge ends, increase the deformation of bearings supported by the middle piers, and increase the internal forces of piers and piles. Therefore, all these effects of track structure should be fully considered in the seismic design of high-speed railway bridges. In contrast, as bearing are severely damaged by the great earthquake, the negative effects of rail-track system are feeble and negligible.
Effects of CRTS II Slab Ballastless Track on the Seismic Responses of a High-Speed Railway Continuous Girder Bridge
As for a 48+80+48 m prestressed concrete continuous girder bridge with CRTS II slab ballastless track on a high-speed railway, a finite element model integrating the rail-track system and the bridge structure system as well as a trackless-bridge model was built by using SAP2000. The effects of the track structure on the seismic responses of bridge were analyzed through dynamic characteristic analysis and nonlinear time history analysis. The results show that the track structure can increase the structural stiffness, and changes the type and order of natural vibration modes. Before bearings are damaged, the track structure can reduce the deformation of bearings at the bridge ends, increase the deformation of bearings supported by the middle piers, and increase the internal forces of piers and piles. Therefore, all these effects of track structure should be fully considered in the seismic design of high-speed railway bridges. In contrast, as bearing are severely damaged by the great earthquake, the negative effects of rail-track system are feeble and negligible.
Effects of CRTS II Slab Ballastless Track on the Seismic Responses of a High-Speed Railway Continuous Girder Bridge
Wei, Biao (author) / Wang, Peng (author) / Jiang, Lizhong (author) / He, Xuhui (author)
First International Conference on Rail Transportation 2017 ; 2017 ; Chengdu, Sichuan Province, China
ICRT 2017 ; 848-860
2018-03-13
Conference paper
Electronic Resource
English
Study on the restoring force model for the high-speed railway CRTS III Slab Ballastless Track
| Springer Verlag | 2022