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Railway ballast load analysis using small-scale cylindrical triaxial test

Antônio Hamilton Michel Merheb Rosangela dos Santos Motta 1976-; Liedi Légi Bariani Bernucci 1958-; Edson de Moura; Robson Correia da Costa; Iuri Sidney Bessa 1988-; Tiago Vieira; Fernando Sgavioli Ribeiro; International Conference on Railway Technology: Research, Development and Maintenance (2nd 2014 Ajaccio-Corsica, France)

Proceedings Stirlingshire: Civil-Comp Press, 2014

Stirlingshire Civil-Comp Press 2014

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  • Título:
    Railway ballast load analysis using small-scale cylindrical triaxial test
  • Autor: Antônio Hamilton Michel Merheb
  • Rosangela dos Santos Motta 1976-; Liedi Légi Bariani Bernucci 1958-; Edson de Moura; Robson Correia da Costa; Iuri Sidney Bessa 1988-; Tiago Vieira; Fernando Sgavioli Ribeiro; International Conference on Railway Technology: Research, Development and Maintenance (2nd 2014 Ajaccio-Corsica, France)
  • Assuntos: LASTRO -- TESTES; FERROVIAS; ESTRUTURA DOS MATERIAIS
  • É parte de: Proceedings Stirlingshire: Civil-Comp Press, 2014
  • Notas: Disponível em:<https://www.researchgate.net/publication/269198761>Acesso em: 16nov. 2018
  • Descrição: This paper presents results of triaxial testing performed on a ballast material regarding its permanent deformation and degradation behaviour during cyclic loading. The tests simulated a large number of passing train wheels. Materials used in ballast layers are usually comprised of a highly coarse-graded gradation, hence the implementation of large-scale laboratory tests is difficult to conduct due to the corresponding large-scale triaxial specimens for railroad ballast material. The main purpose of this paper was to evaluate the applicability of the parallel gradation technique in triaxial tests, using small-scale cylindrical equipment with 150mm (width) x 300mm (height), in which it is easier to manipulate small fractions, as well as to assess the influence of two different gradations on ballast breakage and permanent vertical deformation. It was found that granular materials reveal a strong tendency to settle under higher stress levels, causing a significant increase of their strength and stiffness. The AREMA No. 24 gradation was found to be the most resistant to ballast settlement. Results of this study confirm that the confining pressure should be considered as an important track design parameter. The results contribute to a better understand of the mechanical behaviour of ballast layers, thus support ongoing researches on railroad structure
  • Editor: Stirlingshire Civil-Comp Press
  • Data de criação/publicação: 2014
  • Formato: On-line.
  • Idioma: Inglês;Francês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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