Research PaperNo Access

Running Safety of a High-Speed Train within a Bridge Zone

V. Poliakov

Bridges and Tunnels Department, Russian University of Transport, 9b9 Obrazcova Street, Moscow 127994, Russia

E-mail Address: pvy55@mail.ru

Corresponding author.

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Zhang Nan

Department of Bridge Engineering, School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, P. R. China

E-mail Address: nzhang@bjtu.edu.cn

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V. Saurin

Institute of Problems of Mechanics, Russian Academy of Sciences, pr. Vernadskogo 101, Moscow, Russia

E-mail Address: saurinvvs2@gmail.com

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, and

Dang Ngoc Thanh

Department of Civil Engineering, University of Technology and Education - The University of Danang, Danang City, Vietnam

E-mail Address: dangthanh1810@gmail.com

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https://doi.org/10.1142/S0219455420501163Cited by:12 (Source: Crossref)

Abstract

This paper describes the issue of validity of running safety criterion on high-speed railways (HSR). In this research, the 2D model of ‘car–track–bridge’ system is used. A feature of HSR is the practical reaching of the critical speeds that cause resonance of bridge superstructures. The Eurocode establishes the limit of bridge superstructure acceleration below 5m/s² in case of nonballasted track. This limit does not suit in certain conditions such as resonance of the superstructure that is permitted in Eurocode. In this case, there is no correlation between acceleration limit and firm wheel–rail contact. The numerical analysis shows repeated wheel lift-off during train passing a bridge zone. It is resonance of the bridge deck that causes this effect because without resonance, the running train is safe. Lower damping in nonballasted track increases resonant vibration influence.

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