Nonlinear Analysis of Rail Track Structures

Raymond, G P; Turcke, D.J.; Svec, Otto J.

doi:10.1016/b978-0-08-022153-3.50024-3

Track/Train Dynamics and Design 1978

DOI: 10.1016/b978-0-08-022153-3.50024-3

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Nonlinear Analysis of Rail Track Structures

G P Raymond¹,

D.J. Turcke²,

Otto J. Svec³

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2023

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“…The subgrade problems have contributed to the settlement of railway structures in these areas. There are two main causes of subgrade settlement: the load factor and the soil factor ( 5 , 6 ). The load factor is the axle load and the repeated traffic load of trains and the weight of the track structure material, while the soil factor is the soil moisture and soil type.…”

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confidence: 99%

Assessment of the Simultaneous Use of Asphalt Concrete and Foam Concrete as a Full Cross-Section Layer in the Substructure of the China Railway Track System (CRTS) III Slab Ballastless Tracks

Klomranok,

2023

Transportation Research Record: Journal of the Transportation R

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This paper proposes the simultaneous application of asphalt concrete (AC) and foam concrete (FC) as a full cross-section layer in the substructure of the high-speed railway ballastless track. AC is designed as a waterproof layer and is placed as part of the top surface layer of the subgrade bed where the mixture is made from three types of performance grade (PG) binders (normal, high, and modified grade binders) named PG64-22, PG70-22, and PG76-22, respectively. FC is designed as a subgrade material to replace the traditional material in the bottom layer of the subgrade bed. It has a target density of 500–700 kg/m3 and polypropylene (PP) fiber is added at a ratio of 0.25% and 0.40% by volume. The mechanical properties of both materials are reviewed from the authors’ previous research, in which they were assessed through laboratory testing in accordance with ASTM standards. In addition, the numerical model analyzed the dynamic response of the whole structure when AC and FC were applied as full cross-section layers under different thicknesses of FC and then compared with traditional track structures. Laboratory test results indicate that PG76-22, or modified asphalt binder and FC at a density of 600 kg/m3 with the addition of 0.25% PP fiber, is suitable for use in slab ballastless tracks. In addition, the prediction of the model shows that AC at a thickness of 0.12 m and FC at a thickness of 1.00 m can reduce the stress and vibration of the track structure better than the traditional structure, resulting in stabilization and long-term service life.

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mentioning

confidence: 99%

Assessment of the Simultaneous Use of Asphalt Concrete and Foam Concrete as a Full Cross-Section Layer in the Substructure of the China Railway Track System (CRTS) III Slab Ballastless Tracks

Klomranok,

2023

Transportation Research Record: Journal of the Transportation R

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Nonlinear Analysis of Rail Track Structures

Cited by 1 publication

References 5 publications

Assessment of the Simultaneous Use of Asphalt Concrete and Foam Concrete as a Full Cross-Section Layer in the Substructure of the China Railway Track System (CRTS) III Slab Ballastless Tracks

Assessment of the Simultaneous Use of Asphalt Concrete and Foam Concrete as a Full Cross-Section Layer in the Substructure of the China Railway Track System (CRTS) III Slab Ballastless Tracks

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