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

Yan, Bin; Shi, Liwei; Pu, Hao; Griffiths, D. Ll.; Cai, Xiaopei

doi:10.1007/s11431-016-0222-6

Cited by 70 publications

(19 citation statements)

References 9 publications

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“…Dicleli and Bruneau (1995) found that bearing is the key component in a track-bridge system and is prone to be damaged. Yan et al (2017) established a 3D nonlinear dynamic model for simply-supported bridges considering the influence of the CRTS-II track system and numerical analyses were performed. Their result shows that the track system and piers are easily damaged during earthquakes.…”

Section: Introductionmentioning

confidence: 99%

Effects of shear keys and track system on the behavior of simply-supported bridges for high-speed trains subjected to transverse earthquake excitations

Meng

Chen

Yang

et al. 2021

Advances in Structural Engineering

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China railway track system II (CRTS-II) slab ballastless track is usually constructed on high-speed railway (HSR) bridges to ensure the rail smoothness and the running safety of high-speed trains, but the use of the longitudinal continuous track system would significantly alter the dynamic characteristics of the bridges and therefore influence the bridge seismic responses. The pounding at shear keys has also been identified as one of the critical factors affecting the seismic behavior of bridges. To investigate the effects of shear keys and CRTS-II track system on the seismic behavior of HSR simply-supported bridges subjected to transverse earthquake excitations, detailed 3D finite element models are developed by using ABAQUS. The seismic responses calculated from the bridges with and without considering shear keys are firstly compared. The result shows that the shear keys can effectively limit the development of pier-girder relative displacement and thus decrease the potential of girder dislocation. However, large pounding forces would be generated between the shear keys and bearing pads and transferred to bridge piers, which will amplify the seismic responses of the bridge piers. The result of seismic analyses of multiple-span simply-supported bridges with and without considering the track system shows that the track system will significantly influence the distribution of seismic forces among the bridge spans. For a bridge with equal pier heights, considering the track system will reduce the seismic responses of side spans (close to subgrade) but will increase those of the middle spans. Whereas an opposite trend is found for bridges with high middle piers and short side piers.

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Section: Introductionmentioning

confidence: 99%

Effects of shear keys and track system on the behavior of simply-supported bridges for high-speed trains subjected to transverse earthquake excitations

Meng

Chen

Yang

et al. 2021

Advances in Structural Engineering

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“…Currently, the seismic response of HSR bridge with track structure is studied by researchers in different aspects. Yan et al (2017) studied the force and deformation features of simply supported bridges and CRTS II track under different intensities of EI centro earthquake. Zhang et al (2014) investigated the influence of CRTS II unballasted track on seismic response of HSR bridge; the results show that the effect of CRTS II system restraints on seismic response for multi-span simply supported girder bridge is greater so the rail–bridge model should be adopted in earthquake response analysis.…”

Section: Introductionmentioning

confidence: 99%

Seismic damage features of high-speed railway simply supported bridge–track system under near-fault earthquake

Guo

Gao

et al. 2020

Advances in Structural Engineering

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Seismic loads pose a potential threat to the high-speed railway bridges in China, which have been rapidly developing in recent years, especially for those subjected to the near-fault earthquakes. The previous researches on high-speed railway bridges usually concern the far-field earthquake, and the damage of high-speed railway bridge–track system subjected to the near-fault earthquake has not been well studied. In this article, a seven-span high-speed railway simply supported bridge–track system is selected to explore the seismic damage features under the excitation of near-fault earthquake which possesses characteristics of obvious velocity pulse and high-frequency vibration. First, a detailed finite element model of the selected bridge–track system is established and calibrated by the experimental data and design code. Then the low-frequency pulse-type portion and the high-frequency background portion are separated from the selected eight original near-fault records, and a series of nonlinear dynamic analysis is conducted. The results show that the background portion leads to more serious damage of the bridge–track system than the pulse-type portion. Due to the high stiffness of high-speed railway bridge–track system, the background portion with high-frequency vibration characteristic produces the main part of seismic response of system. As for the damage part of system, the weakest component of the bridge–track system is the sliding layer, followed by the shear alveolar.

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“…As a kind of cable system, cable-stayed bridge has been widely applied in high-speed railway construction due to its large spanning capability. e bridge-track interactionis aggravated under the effects of various loads including the temperature, train load, and seismic load [1][2][3][4][5][6][7][8]. e bridgetrack interaction and distribution of rail longitudinal force on the long-span bridges are more complex than those on simply supported bridges and concrete continuous bridges [9,10].…”

Section: Introductionmentioning

confidence: 99%

Layout Optimization of Rail Expansion Joint on Long‐Span Cable‐Stayed Bridge for High‐Speed Railway

Cai

Liu

Xie

et al. 2020

Advances in Civil Engineering

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Continuous welded rail (CWR) has been widely applied to the Chinese high-speed railways. It is interesting to reduce the effect of rail longitudinal force on the long-span cable-stayed bridges. Taking the pile-soil interaction into account, the finite element model of CWR on the long-span cable-stayed bridge is established based on the bridge-track interaction theory. The rail longitudinal force can be reduced and the track stability can be improved significantly by installing Rail Expansion Joint (REJ). The layout scheme of REJ plays a controlling role on designing CWR on bridges. Results show that the unidirectional REJ should be laid on both ends of the long-span cable-stayed bridge. Switch rails of REJ are set up on the main beam, stock rails are laid on the simply supported beams and crossing over beam joints, and several-meter long small resistance fasteners need to be laid on the sides of stock rails to reduce the fixed pier longitudinal force near the main beam. The range of REJ laid on cable-stayed bridge is mainly determined by temperature, rail breaking, and seismic condition; the bending and braking loads have little influence on it. Multiple field tests are carried out to prove the validity of the numerical model and the design methodology.

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

Cited by 70 publications

References 9 publications

Effects of shear keys and track system on the behavior of simply-supported bridges for high-speed trains subjected to transverse earthquake excitations

Effects of shear keys and track system on the behavior of simply-supported bridges for high-speed trains subjected to transverse earthquake excitations

Seismic damage features of high-speed railway simply supported bridge–track system under near-fault earthquake

Layout Optimization of Rail Expansion Joint on Long‐Span Cable‐Stayed Bridge for High‐Speed Railway

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