Location

Arlington, Virginia

Session Start Date

8-11-2008

Session End Date

8-16-2008

Abstract

In Greece, during the 1980’s, 60% of the twin-block concrete ties designed for 200 km/h, which were laid on a track with maximum operational speed of 140 km/h, presented serious cracks. The existing theories could not justify the appearance of these cracks since the calculated actions on ties were much lower than the limit values. It was found that the geotechnical conditions of the track substructure played a key role in the damage of the sleepers. In this paper a model for the determination of the load acting on the track’s superstructure is presented properly taking into account the geotechnical conditions of the track substructure. The basic parameters of concrete tie design considering the most adverse conditions of a railway network are investigated, and a methodology for calculating the load undertaken by each tie is proposed. Finally, numerical applications on twin-block and monoblock ties are presented, including the use of high resilience fastenings. Moreover an application for the heavy-haul rail transport is presented, in case of a track equipped with W24 fastening and concrete sleepers.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Sixth Conference

Publisher

Missouri University of Science and Technology

Publication Date

8-11-2008

Document Version

Final Version

Rights

© 2008 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Damage of Railway Sleepers under Dynamic Loads: A Case History from the Greek Railway Network

Arlington, Virginia

In Greece, during the 1980’s, 60% of the twin-block concrete ties designed for 200 km/h, which were laid on a track with maximum operational speed of 140 km/h, presented serious cracks. The existing theories could not justify the appearance of these cracks since the calculated actions on ties were much lower than the limit values. It was found that the geotechnical conditions of the track substructure played a key role in the damage of the sleepers. In this paper a model for the determination of the load acting on the track’s superstructure is presented properly taking into account the geotechnical conditions of the track substructure. The basic parameters of concrete tie design considering the most adverse conditions of a railway network are investigated, and a methodology for calculating the load undertaken by each tie is proposed. Finally, numerical applications on twin-block and monoblock ties are presented, including the use of high resilience fastenings. Moreover an application for the heavy-haul rail transport is presented, in case of a track equipped with W24 fastening and concrete sleepers.