Effect of steel ratio on behavior of Continuously Reinforced Concrete Railway Track under environmental loads

Cho, Young Kyo; Kim, Seong–Min; Chung, Wonseok; Kim, Jai Chul; Oh, Han Jin

doi:10.1007/s12205-014-1559-y

Cited by 13 publications

(6 citation statements)

References 12 publications

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“…However, a large number of diseases were observed in the operation stage, such as the surface crack of the track slab, the crack of the base plate, the interface separation between the filling layer and the track slab, etc. [ 1 , 2 , 3 , 4 ]. Among them, the interface separation of the CRTS II slab ballastless track is the most significant [ 5 ], which seriously affects the dynamic characteristics of the slab track and causes potential damage [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Interlaminar Stress of CRTS II Slab Ballastless Track Induced by Creep and Shrinkage of Concrete

Zheng

Liu

et al. 2022

Materials

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The secondary development of ABAQUS was carried out to calculate the shrinkage and creep of concrete, and a finite element model of the China Railway Track System (CRTS) II slab ballastless track was established. Then, the interlaminar stress of CRTS II slab ballastless track at different ages of the track slab during laying (AOTSL) caused by concrete shrinkage and creep was studied. The obtained results showed that the stress redistribution occurred in the sliding layer, which resulted in the generation of a gap. Although the gap length was slightly reduced due to the shear cogging, the sliding layer at the slab edge is more prone to produce gaps. Under the effect of shrinkage and creep of the ballastless track, large additional shear stress, up to 0.676 MPa, was induced at the interface between CA mortar and the track slab. Meanwhile, the appearance of additional vertical and lateral forces of the shear cogging was caused by the shrinkage and creep of the ballastless track. Additionally, by further analysis, the recommended AOTSL ranges from 120 days to 180 days.

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Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Interlaminar Stress of CRTS II Slab Ballastless Track Induced by Creep and Shrinkage of Concrete

Zheng

Liu

et al. 2022

Materials

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“…Many kinds of related research have been conducted. Cho et al 15 investigated the effect of steel ratio on the stress and crack width of DB ballastless track under temperature load using ABAQUS software. Liu et al 16 studied the damage mechanism and development of the slab joint under temperature rise for CRTS II slab track using the damaged plasticity model and cohesive zone model respectively for the concrete and interface.…”

Section: Introductionmentioning

confidence: 99%

“…The temperature loads in Refs. 15 – 20 cannot reflect the time-varying characteristic of the actual temperature loads. Some scholars adopted the measured or calculated time-varying temperature loads to research ballastless track’s mechanical performance and damage.…”

Section: Introductionmentioning

confidence: 99%

Influence of temperature gradient of slab track on the dynamic responses of the train-CRTS III slab track on subgrade nonlinear coupled system

Sun

et al. 2022

Sci Rep

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Temperature is an important load for ballastless track. However, there is little research on the system dynamic responses when a train travels on a ballastless track under the temperature gradient of ballastless track. Considering the moving train, temperature gradient of slab track, gravity of slab track, and the contact nonlinearity between interfaces of slab track, a dynamic model for a high-speed train runs along the CRTS III slab track on subgrade is developed by a nonlinear coupled way in ANSYS. The system dynamic responses under the temperature gradient of slab track with different amplitudes are theoretically investigated with the model. The results show that: (1) The proportions of the initial force and stress caused by the temperature gradient of slab track are different for different calculation items. The initial fastener tension force and positive slab bending stress have large proportions exceeding 50%. (2) The maximum dynamic responses for slab track are not uniform along the track. The maximum slab bending stress, slab acceleration, concrete base acceleration appear in the slab middle, at the slab end, and at the concrete base end, respectively. (3) The maximum accelerations of track components appear when the fifth or sixth wheel passes the measuring point, and at least two cars should be used. (4) The temperature gradient of slab track has a small influence on the car body acceleration. However, the influences on the slab acceleration, concrete base acceleration, fastener tension force are large, and the influence on the slab bending stress is huge.

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“…There are two types of concrete slab track or ballast-less system: (1) The continuous concrete slab track, which is built with cast-in-situ concrete slabs, and (2) the discrete concrete slab track, which uses precast slabs [6][7][8][9][10]. The previous study pointed out that, although the cast-in-place concrete slab track has been used widely over the world, there are many disadvantages of this type of track such as poor quality of concrete slab, limits on the track installation, and the effects of air pollution that can affect the workers' health when constructing underground as well as in the tunnel section [11].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Structural Dynamic Response and Vehicle-Track Interaction of Precast Slab Track Systems

Jang

Kang

2021

Applied Sciences

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Recently, precast slab tracks have been used widely in railway applications, especially in conventional urban railway lines. These types of tracks are rapidly constructed and limit interruptions to train operation. However, the problems of dynamic stability when the trains run on the discontinuous type of tracks must be seriously considered. This paper focuses on analyzing the train-track interaction in two types of tracks under the dynamic load by using the numerical analysis program (APATSI) to evaluate the structural response as well as the running safety to precisely understand the load transfer efficiency of precast slab track systems.

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Effect of steel ratio on behavior of Continuously Reinforced Concrete Railway Track under environmental loads

Cited by 13 publications

References 12 publications

Numerical Investigation of Interlaminar Stress of CRTS II Slab Ballastless Track Induced by Creep and Shrinkage of Concrete

Numerical Investigation of Interlaminar Stress of CRTS II Slab Ballastless Track Induced by Creep and Shrinkage of Concrete

Influence of temperature gradient of slab track on the dynamic responses of the train-CRTS III slab track on subgrade nonlinear coupled system

Assessment of Structural Dynamic Response and Vehicle-Track Interaction of Precast Slab Track Systems

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