New Perspectives on Running Safety in Ballastless Railway Bridges

• Type: Article in International Conference Proceedings Book
• Date: 2024-09

Authors

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

Conference proceedings International

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

Pages: 1-10

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific