A NEW METHODOLOGY FOR EVALUATING THE SAFE TEMPERATURE IN CONTINUOUS WELDED RAIL TRACKS

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

Carvalho, J (Autor) Outra; Delgado, J (Autor) FEUP; Calcada, R (Autor) FEUP; Delgado, R (Autor) FEUP

Revista

Título: International Journal of Structural Stability and Dynamics

Vol. 13

Página Final: 1350016

ISSN: 0219-4554

Editora: World Scientific

Indexação

ISI Web of Knowledge - 11 Citações

Scopus - 14 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia civil

Outras Informações

ID Authenticus: P-005-2RX

DOI: 10.1142/s0219455413500168

Abstract (EN): The use of continuous welded rails (CWR) is increasingly common and is particularly important when it comes to high-speed ballasted tracks. As the longitudinal displacements are restricted in CWR tracks, a considerable rise in temperature induces compressive stresses in the rails that can lead to track buckling. Given the nonlinear behavior of the ballast, usually represented by a linear plastic model, the problem of snap-through buckling may occur, for which only a few nonlinear analysis methods can trace the full response of the track structure. However, these methods fail to yield convergent solutions for problems with thermal loads when implemented in their conventional algorithm. For this reason, a new methodology is presented allowing the calculation of the safe temperature. In addition, some analytical results are also derived for comparison with the numerical results, obtained using three-dimensional finite element beam models provided by ANSYS.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 21