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A. Hochuli¹, E. Brühwiler¹ and J.-G. Trouillet²

¹Laboratory for Maintenance and Safety of Structures, Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland
²Department of Railway Engineering, A.Aegerter & Dr. O.Bosshardt AG Engineers and Planers, Basel, Switzerland

doi:10.4203/ccc.7.20.1

A. Hochuli, E. Brühwiler, J.-G. Trouillet, "Innovative Concepts for Fatigue-Resistant, Durable and Safe Fixed Railway Tracks in UHPFRC", in J. Pombo, (Editor), "Proceedings of the Sixth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 7, Paper 20.1, 2024, doi:10.4203/ccc.7.20.1

Keywords: fixed railway track, ballastless railway track, UHPFRC, uncracked structural elements, rail fastener, crack-free.

Abstract

This paper outlines novel concepts to address structural shortcomings in modern fixed railway track systems made of concrete, focusing on enhancing structural safety, durability, and fatigue resistance. It introduces Ultra-High Performance Fibre Reinforced Cemetitious Composite (UHPFRC) as a novel building material, known for its dense, fine-grained matrix strengthened with a high amount of short slender steel fibers. UHPFRC has the capacity to transmit tensile stresses up to 7-10 MPa in the elastic and 10-16 MPa in the strain-hardening domains while maintaining fatigue resistance up to 70% in the elastic and 45% in the strain-hardening domain. UHPFRC remains crack-free under service conditions. This contribution presents three concepts of the high-performance fixed railway tracks built in UHPFRC: 1. Fixed track with a slab thickness of 100 mm. It has been developed to reduce the self-weight of the railway track on bridges and to increase the clearance in the cross-section of existing tunnels. 2. Fixed track for the rapid replacement of damaged sleepers. The concept guarantees a high track alignment quality. It can also be applied for constructing new fixed tracks designed as mass-spring systems. 3. Single-span bridge girder with an integrated fixed railway track.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 7 PROCEEDINGS OF THE SIXTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 20.1 Innovative Concepts for Fatigue-Resistant, Durable and Safe Fixed Railway Tracks in UHPFRC A. Hochuli¹, E. Brühwiler¹ and J.-G. Trouillet² ¹Laboratory for Maintenance and Safety of Structures, Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland ²Department of Railway Engineering, A.Aegerter & Dr. O.Bosshardt AG Engineers and Planers, Basel, Switzerland doi:10.4203/ccc.7.20.1 Full Bibliographic Reference for this paper A. Hochuli, E. Brühwiler, J.-G. Trouillet, "Innovative Concepts for Fatigue-Resistant, Durable and Safe Fixed Railway Tracks in UHPFRC", in J. Pombo, (Editor), "Proceedings of the Sixth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 7, Paper 20.1, 2024, doi:10.4203/ccc.7.20.1 Keywords: fixed railway track, ballastless railway track, UHPFRC, uncracked structural elements, rail fastener, crack-free. Abstract This paper outlines novel concepts to address structural shortcomings in modern fixed railway track systems made of concrete, focusing on enhancing structural safety, durability, and fatigue resistance. It introduces Ultra-High Performance Fibre Reinforced Cemetitious Composite (UHPFRC) as a novel building material, known for its dense, fine-grained matrix strengthened with a high amount of short slender steel fibers. UHPFRC has the capacity to transmit tensile stresses up to 7-10 MPa in the elastic and 10-16 MPa in the strain-hardening domains while maintaining fatigue resistance up to 70% in the elastic and 45% in the strain-hardening domain. UHPFRC remains crack-free under service conditions. This contribution presents three concepts of the high-performance fixed railway tracks built in UHPFRC: 1. Fixed track with a slab thickness of 100 mm. It has been developed to reduce the self-weight of the railway track on bridges and to increase the clearance in the cross-section of existing tunnels. 2. Fixed track for the rapid replacement of damaged sleepers. The concept guarantees a high track alignment quality. It can also be applied for constructing new fixed tracks designed as mass-spring systems. 3. Single-span bridge girder with an integrated fixed railway track. download the full-text of this paper (PDF, 8 pages, 696 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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