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Elastic-plastic seismic response of CRTS II slab ballastless track system on high-speed railway bridges

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Abstract

China railways track structure II (CRTS II) slab ballastless track on bridge is one kind of track structures unique to China. Its main bearing component of longitudinal force is the continuous base plate rather than rail. And the track-bridge interaction is weakened by the sliding layer installed between base plate and bridge deck. In order to study the dynamic response of CRTS II slab ballastless track on bridge under seismic action, a 3D nonlinear dynamic model for simply-supported bridges and CRTS II track was established, which considered structures such as steel rail, fasteners, track plate, mortar layer, base plate, sliding layer, bridge, consolidation, anchors, stoppers, etc. Then its force and deformation features under different intensities of seismic excitation were studied. As revealed, the seismic response of the system increases with the increase of seismic intensity. The peak stresses of rail, track plate and base plate all occur at the abutment or anchors. Both track plate and base plate are about to crack. Besides, the rapid relative displacement between base plate and bridge deck due to the small friction coefficient of sliding layer is beneficial to improve the seismic performance of the system. During the earthquake, a large vertical displacement appears in base plate which leads to frequent collisions between stoppers and base plate, as a result, stoppers may be damaged.

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Authors and Affiliations

  1. School of Civil Engineering, Central South University, Changsha, 410075, China

    Bin Yan, Hao Pu & GongLian Dai

  2. China Coal Xi’an Design Engineering Co., Ltd., Xi’an, 710054, China

    Shi Liu

  3. School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, China

    XiaoPei Cai

Authors
  1. Bin Yan
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  2. Shi Liu
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  3. Hao Pu
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  4. GongLian Dai
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  5. XiaoPei Cai
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Correspondence to XiaoPei Cai.

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Yan, B., Liu, S., Pu, H. et al. Elastic-plastic seismic response of CRTS II slab ballastless track system on high-speed railway bridges. Sci. China Technol. Sci. 60, 865–871 (2017). https://doi.org/10.1007/s11431-016-0222-6

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  • DOI: https://doi.org/10.1007/s11431-016-0222-6

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