Research on the fatigue performance of self-compacting concrete structure in CRTSIII slab ballastless track under the action of heavy haul train

Zeng, Zhiping; Huang, Xudong; Yan, Bin; Wei-dong, Wang; Shuaibu, Abdulmumin Ahmed; He, Xuhui

doi:10.1016/j.conbuildmat.2021.124465

Cited by 28 publications

(12 citation statements)

References 35 publications

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“…However, looking at the research results, there are few reports on the theoretical and test studies on the structural mechanical properties of CRTSIII SBT under the action of HHT, especially for the base plate structure. Study of the fatigue damage evolution of the base plate structure under the load of the large axle load will not only enable the smooth implementation of this type of track for heavy-haul application, but also enable the strengthening and optimization of the track structure form [41].…”

Section: Research Content 121 Necessity Of This Researchmentioning

confidence: 99%

“…The SCC layer, base and rigid supporting foundation were built in the light of the design drawings and construction process specifications. During the building phase, the rails and fasteners were installed, together with the corresponding test components (Figure 6) [41]. The slab was manufactured in a track slab factory following the standard process criteria.…”

Section: (Ii) Test Programmentioning

confidence: 99%

“…Figure 7 shows the lateral and longitudinal diagrams of the structure [41]. Table 3 shows the simulation element adopted by each structure.…”

Section: Finite Element Model 221 Model Parameter Settingsmentioning

confidence: 99%

“…Table 3 shows the simulation element adopted by each structure. When analyzing the fatigue load of the track slab, it is necessary to simplify the fatigue shape according to the fatigue characteristics of the steel and concrete materials (Figure 8) to obtain the fatigue analysis of unequal step length in the numerical simulation, where D represents structural damage, N represents the number of load actions, and N f represents the number of ultimate fatigue loads [41].…”

Section: Finite Element Model 221 Model Parameter Settingsmentioning

confidence: 99%

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Research on Fatigue Damage Evolution of the Base Plate Structure of China Railway Track System III Type Slab Ballastless Track under Heavy Haul Train Load

Zeng

Huang

et al. 2022

Applied Sciences

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To meet the transportation requirements of heavy-haul trains, it is necessary to consider the use of prestressed reinforced concrete ballastless tracks. Therefore, the CRTSIII SBT (China Railway Track System III-type slab ballastless track) has been considered for its convenient construction and geometric adjustment. Considering the problems existing in the base plate of CRTSIII SBT in heavy-haul applications, an indoor test and simulation were conducted to explore the cracking phenomenon of the base plate concrete under fatigue load. The reliability of the simulation was verified through the experimental results. A fatigue crack development law of the base plate structure was established. Furthermore, the influence of the load position, the thickness of self-compacting concrete and axle loads on the fatigue damage of the base plate structure were investigated. For the CRTSIII SBT subjected to heavier axle loads, it is appropriate to thicken the self-compacting concrete layer and strengthen the concrete and steel reinforcement at the plate end to reduce fatigue damage and cracks. The research results can serve as a basis for the optimization of the CRTSIII SBT base plate structure in heavy-haul railway applications.

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Section: Research Content 121 Necessity Of This Researchmentioning

confidence: 99%

Section: (Ii) Test Programmentioning

confidence: 99%

“…Figure 7 shows the lateral and longitudinal diagrams of the structure [41]. Table 3 shows the simulation element adopted by each structure.…”

Section: Finite Element Model 221 Model Parameter Settingsmentioning

confidence: 99%

Section: Finite Element Model 221 Model Parameter Settingsmentioning

confidence: 99%

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Research on Fatigue Damage Evolution of the Base Plate Structure of China Railway Track System III Type Slab Ballastless Track under Heavy Haul Train Load

Zeng

Huang

et al. 2022

Applied Sciences

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“…Due to high reliability and stability, ballastless slab track systems have been widely utilized in high-speed railways all over the world. In China, the CRTS III (China Railway Track System III) slab ballastless track structure is the third type and the latest slab track system, and more than 5000 km has been built as of October 2020 [1]. The steam-cured concrete precast slab, the self-compacting concrete (SCC) filling layer, the isolation layer (geotextile material), and the concrete base plates are the main components of the CRTS III slab track, which is a laminated structure.…”

Section: Introductionmentioning

confidence: 99%

Transverse Cracking of Concrete Base Plate in CRTS III Ballastless Track Structure: Effects of Environmental Boundary Conditions

Guo

Huang²,

Zhao³

et al. 2021

Applied Sciences

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The cast-in-place concrete base plate is a main member of the China Railway Track System (CRTS) III ballastless track structure that is prone to generating early transverse cracking. Such cracks can dramatically affect the performance and service life of the railway track structure. This study investigated the influence of temperature and moisture boundary conditions on early cracking behavior of the CRTS III base plate by using approaches of both in situ measurements and numerical modelling. In-site measurements of strain and temperature were made in four test series of CRTS III base plates under the same natural environmental condition but cured with different regimes, and a total of 96 measuring positions were monitored for up to 150 days. The results showed that the strain magnitude and distribution in the field base plate, the initial time at cracking, and the observed cracking pattern varied significantly between the different test series. In order to understand the mechanisms that create these transverse cracks and to provide guidelines for the current curing strategy during construction, the characteristics of temperature-induced and moisture-induced stresses were analyzed by using 3D numerical modelling and by considering early-age concrete creep properties, meteorological factors, and the influence from environmental boundary conditions. The calculated results revealed that early-age transverse cracking in CRTS III base plate depends more on drying shrinkage stress than temperature stress. By conducting this study, we expect to provide guidance for reducing or eliminating early cracks of CRTS III concrete base plate.

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Damage Evolution of Ballastless Track Concrete Exposed to Flexural Fatigue Loads: The Application of Ultrasonic Pulse Velocity, Impact-echo and Surface Electrical Resistance Method

Yang,

Li,

Wen

et al. 2024

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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Research on the fatigue performance of self-compacting concrete structure in CRTSIII slab ballastless track under the action of heavy haul train

Cited by 28 publications

References 35 publications

Research on Fatigue Damage Evolution of the Base Plate Structure of China Railway Track System III Type Slab Ballastless Track under Heavy Haul Train Load

Research on Fatigue Damage Evolution of the Base Plate Structure of China Railway Track System III Type Slab Ballastless Track under Heavy Haul Train Load

Transverse Cracking of Concrete Base Plate in CRTS III Ballastless Track Structure: Effects of Environmental Boundary Conditions

Damage Evolution of Ballastless Track Concrete Exposed to Flexural Fatigue Loads: The Application of Ultrasonic Pulse Velocity, Impact-echo and Surface Electrical Resistance Method

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