Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Finite Element Analysis of CRTS III Slab Track Model
This paper evaluated the mechanical properties of a ballastless track system using the finite element model developed in ABAQUS. The CRTS III ballastless track model was chosen, composed of steel rails, fasteners, prefabricated concrete slabs, and intermediate and base layers. The track model has a 16.8 m length in the longitudinal direction, and the analysis computation was limited to static analysis and linear-elastic material stress–strain relation. In this numerical analysis, steel rails were modeled as beam elements, fasteners were modeled as spring connectors, and prefabricated slabs, intermediate layer, and base layer were modeled as 3D solid elements. Soil support was represented as an elastic foundation throughout the length of the track model. Contact condition between track components was facilitated through surface contact elements having frictionless type. Load model LM-71 suggested by EN 1991-2 was applied to the track model through a load factor (kl), and soil elastic foundation coefficient (ks) varied from 0.01 to 0.06 N/mm3. Initially, patch test analysis to ensure convergence of the numerical solution was conducted and perform simple analysis using one point load acting on the track model to compare the numerical results with the calculation given by Zimmermann and Westergaard's methods provided by EN 16432-2 (2017). The numerical results indicated that the axial fastener force and flexural stress steel rail has a linear function with respect to kl, while the deflection of steel rail, flexural stress of prefabricated concrete slab, intermediate layer and the base layer is best described by α(ks)βkl where α and β are constants. As the minimum subgrade modulus stiffness required by EN 16432-1 (2017) is 60 N/mm2, which is equivalent to a subgrade modulus reaction ks of 0.0153 N/mm3, a load factor kl of 1.28 will result in steel rail deflection of 6 mm, which is the allowable value recommended by the American Railway Engineering and Maintenance-of-Way Association.
Finite Element Analysis of CRTS III Slab Track Model
This paper evaluated the mechanical properties of a ballastless track system using the finite element model developed in ABAQUS. The CRTS III ballastless track model was chosen, composed of steel rails, fasteners, prefabricated concrete slabs, and intermediate and base layers. The track model has a 16.8 m length in the longitudinal direction, and the analysis computation was limited to static analysis and linear-elastic material stress–strain relation. In this numerical analysis, steel rails were modeled as beam elements, fasteners were modeled as spring connectors, and prefabricated slabs, intermediate layer, and base layer were modeled as 3D solid elements. Soil support was represented as an elastic foundation throughout the length of the track model. Contact condition between track components was facilitated through surface contact elements having frictionless type. Load model LM-71 suggested by EN 1991-2 was applied to the track model through a load factor (kl), and soil elastic foundation coefficient (ks) varied from 0.01 to 0.06 N/mm3. Initially, patch test analysis to ensure convergence of the numerical solution was conducted and perform simple analysis using one point load acting on the track model to compare the numerical results with the calculation given by Zimmermann and Westergaard's methods provided by EN 16432-2 (2017). The numerical results indicated that the axial fastener force and flexural stress steel rail has a linear function with respect to kl, while the deflection of steel rail, flexural stress of prefabricated concrete slab, intermediate layer and the base layer is best described by α(ks)βkl where α and β are constants. As the minimum subgrade modulus stiffness required by EN 16432-1 (2017) is 60 N/mm2, which is equivalent to a subgrade modulus reaction ks of 0.0153 N/mm3, a load factor kl of 1.28 will result in steel rail deflection of 6 mm, which is the allowable value recommended by the American Railway Engineering and Maintenance-of-Way Association.
Finite Element Analysis of CRTS III Slab Track Model
Lecture Notes in Civil Engineering
Belayutham, Sheila (Herausgeber:in) / Che Ibrahim, Che Khairil Izam (Herausgeber:in) / Alisibramulisi, Anizahyati (Herausgeber:in) / Mansor, Hazrina (Herausgeber:in) / Billah, Muntasir (Herausgeber:in) / Sufaat, Muchtar (Autor:in) / Awaludin, Ali (Autor:in) / Satyarno, Iman (Autor:in) / Triwiyono, Andreas (Autor:in) / Aminullah, Akhmad (Autor:in)
International Conference on Sustainable Civil Engineering Structures and Construction Materials ; 2020
07.04.2022
15 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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