New Perspectives on Running Safety in Ballastless Railway Bridges

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2024-09

Autores

G. Ferreira (Autor) FEUP; P. A. Montenegro (Autor) FEUP; A. A. Henriques (Autor) FEUP; R. Calçada (Autor) FEUP

Ata de Conferência Internacional

Título: Civil-Comp Conferences - Proceedings of the Sixth International Conference on Railway Technology: Research, Development and Maintenance

Páginas: 1-10

Outras Informações

ID Authenticus: P-018-HB2

DOI: 10.4203/ccc.7.15.8

Abstract (EN): Running safety on ballastless bridges is conditioned by the Eurocode EN 1990 A2 on a limit for vertical acceleration. Although it seems this limit is indicative of avoiding the loss of wheel-rail contact, it is unclear whether such accelerations correspond to derailment situations. This communication presents a parametric study of five single-span slab track bridges with varying levels of track quality. Using the High- Speed Load Model A of the EN 1991-2 and a three-dimensional train-track-bridgeinteraction approach, deck acceleration and derailment criteria (Nadal and Unloading) are calculated. The results indicate a poor correlation between acceleration and the criteria. It is concluded that track quality is the conditioning factor.

Idioma: Inglês

Tipo (Avaliação Docente): Científica