Thermal deformation and interfacial separation of a CRTS II slab ballastless track multilayer structure used in high-speed railways based on meteorological data

Li, Song; Liu, Hubing; Cui, Chenxing; Yu, Zhiwu; Li, Zhigang

doi:10.1016/j.conbuildmat.2019.117528

Cited by 79 publications

(25 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A frequency account analysis was carried out by using the hourly temperature gradient data from placement to the age of 150 days calculated by Equation (13). Figure 8 presents the comparison of temperature gradient frequency distributions in base plates under different curing conditions (Figure 8a for plate center and Figure 8b for plate edge).…”

Section: Measured Temperature Profile and Temperature Gradient Frequency Distributionmentioning

confidence: 99%

“…For Series I, II, III, and IV, the most frequently occurring temperature gradient was around −9.0, −7.5, −3.5, and −3.0 °C /m, respectively. Negative temperature gradients were indicated to be more frequent in the tested days (in winter By using the acquired temperature data from the three VWSGs in plate center/edge regions, the vertical temperature gradient can be calculated by using the following formula: A frequency account analysis was carried out by using the hourly temperature gradient data from placement to the age of 150 days calculated by Equation (13). Figure 8 presents the comparison of temperature gradient frequency distributions in base plates under different curing conditions (Figure 8a for plate center and Figure 8b for plate edge).…”

Section: Measured Temperature Profile and Temperature Gradient Frequency Distributionmentioning

confidence: 99%

“…Previous studies have also revealed that the most important construction-related factors affecting transverse cracking in plate structures of (reinforced) concrete involve weather and curing [10][11][12][13]. Adverse weather includes strong wind, high and low temperatures, and low-humidity conditions [14].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

View full text Add to dashboard Cite

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.

show abstract

Section: Measured Temperature Profile and Temperature Gradient Frequency Distributionmentioning

confidence: 99%

Section: Measured Temperature Profile and Temperature Gradient Frequency Distributionmentioning

confidence: 99%

See 1 more Smart Citation

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

View full text Add to dashboard Cite

show abstract

“…Thermal action includes the overall temperature action and the temperature–gradient action. The overall temperature action causes the expansion, while temperature gradient causes flexural deformations in the structure [ 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. The changes in ambient temperature cause temperature changes within the track structure, and a complex thermal field is generated inside the structural system [ 21 , 22 , 23 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Performance of a Ballastless Track System for the Railway Bridges of High-Speed Lines: Experimental and Numerical Study under Thermal Loading

et al. 2021

View full text Add to dashboard Cite

The mechanical performance of China Railway Track System type II (CRTS II) ballastless track suitable for High-Speed Railway (HSR) bridges is investigated in this project by testing a one-quarter-scaled three-span specimen under thermal loading. Stress analysis was performed both experimentally and numerically, via finite-element modeling in the latter case. The results showed that strains in the track slab, in the cement-emulsified asphalt (CA) mortar and in the track bed, increased nonlinearly with the temperature increase. In the longitudinal direction, the zero-displacement section between the track slab and the track bed was close to the 1/8L section of the beam, while the zero-displacement section between the track slab and the box girder bridge was close to the 3/8L section. The maximum values of the relative vertical displacement between the track bed and the bridge structure occurred in the section at three-quarters of the span. Numerical analysis showed that the lower the temperature, the larger the tensile stresses occurring in the different layers of the track structure, whereas the higher the temperature, the higher the relative displacement between the track system and the box girder bridge. Consequently, quantifying the stresses in the various components of the track structure resulting from sudden temperature drops and evaluating the relative displacements between the rails and the track bed resulting from high-temperature are helpful in the design of ballastless track structures for high-speed railway lines.

show abstract

“…For example, in Harbin the annual temperature difference exceeds 50 • C and the daily temperature difference is about 15 • C in winter. The air temperature changes will cause temperature changes in the ballastless track, and concrete materials tend to deform under temperature loads [17]. The thermal expansion coefficients of asphalt concrete and cement concrete are different, and hence, interface shear stress can be generated by the temperature-stress difference between the adjacent CCBP and ACWL under the fluctuating temperature load [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Investigation on Interface Damage between Cement Concrete Base Plate and Asphalt Concrete Waterproofing Layer under Temperature Load in Ballastless Track

et al. 2020

View full text Add to dashboard Cite

The interfacial bond between cement concrete base plate (CCBP) and asphalt concrete waterproofing layer (ACWL) is a weak portion in the newly developed Chinese high-speed railway ballastless track. The interface damage caused due to fluctuating temperature load and dynamic train load is one of the most critical problems in Northern China. This paper aims to investigate the interface damage evolution process under temperature load via experimental and simulation analysis. Full-scale transverse shear tests were performed to explore the interface bond-slip mode of the adjacent ACWL and CCBP. Then, a finite element model of a ballastless track structure was built and a cohesive zone model (CZM) was utilized to model the interface damage initiation, crack propagation, and delamination process under uniform/gradient temperature load. Furthermore, the dynamic response of the ballastless track where CCBP and ACWL were partly/totally debonded was investigated and compared with the perfectly bonded structure. The results demonstrate that bilinear CZM is capable of revealing the interface damage initiation, crack propagation, and delamination process under temperature load. The interface state between the adjacent CCBP and ACWL was greatly affected by temperature changes and the interface bonding state had a great impact on the dynamic response of ballastless track.

show abstract

Thermal deformation and interfacial separation of a CRTS II slab ballastless track multilayer structure used in high-speed railways based on meteorological data

Cited by 79 publications

References 3 publications

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

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

Mechanical Performance of a Ballastless Track System for the Railway Bridges of High-Speed Lines: Experimental and Numerical Study under Thermal Loading

Investigation on Interface Damage between Cement Concrete Base Plate and Asphalt Concrete Waterproofing Layer under Temperature Load in Ballastless Track

Contact Info

Product

Resources

About