PSI - Issue 75

Available online at www.sciencedirect.com Structural Integrity Procedia (2025) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia (2025) 000–000 Available online at www.sciencedirect.com ScienceDirect

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ScienceDirect

Procedia Structural Integrity 75 (2025) 276–288

© 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of Dr Fabien Lefebvre with at least 2 reviewers per paper © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2025 organizers Keywords: crane runway beam; rail welds; intermittent welds; effective notch stresses; fatigue notch factors a recommendation for the fatigue design of chain intermittent rail welds. This paper investigates whether this design recommendation, in particular the proposed nominal stress formula, can be extended to staggered intermittent rail welds. An experimental investigation on the contact conditions between the crane runway rail and the upper flange of the crane runway beam is presented that is complemented by a numerical investigation. Furthermore, the stressing of rail welds on a transversely stiffened top flanges is studied. © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2025 organizers Keywords: crane runway beam; rail welds; intermittent welds; effective notch stresses; fatigue notch factors Fatigue Design 2025 (FatDes 2025) Experimental and numerical investigations on the fatigue behavior of intermittent rail welds of crane runway beams Elena Sidorov a , Mathias Euler a, * a Brandenburg University of Technology Cottbus-Senftenberg, Konrad-Wachsmann-Allee 2, 03046 Cottbus, Germany Abstract Crane runway beams differ from other structural components used in conventional steel structures since they are subjected to frequently recurring stresses due to the introduction of wheel loads from cranes. Crane runway beams which support top-running overhead bridge cranes are often made from hot-rolled I sections. In case of light crane service, a flat bar of structural steel is commonly used as crane rail and is attached to the upper flange of the beam’s I section by fillet welds. The rail welds are exposed to multi-axial stresses caused by the local wheel load introduction and the global bending and are, therefore, at risk of fatigue. In contrast to the current Eurocode generation, the new Eurocode for crane runway beam design, prEN 1993-6 (2024), will contain a recommendation for the fatigue design of chain intermittent rail welds. This paper investigates whether this design recommendation, in particular the proposed nominal stress formula, can be extended to staggered intermittent rail welds. An experimental investigation on the contact conditions between the crane runway rail and the upper flange of the crane runway beam is presented that is complemented by a numerical investigation. Furthermore, the stressing of rail welds on a transversely stiffened top flanges is studied. Fatigue Design 2025 (FatDes 2025) Experimental and numerical investigations on the fatigue behavior of intermittent rail welds of crane runway beams Elena Sidorov a , Mathias Euler a, * a Brandenburg University of Technology Cottbus-Senftenberg, Konrad-Wachsmann-Allee 2, 03046 Cottbus, Germany Abstract Crane runway beams differ from other structural components used in conventional steel structures since they are subjected to frequently recurring stresses due to the introduction of wheel loads from cranes. Crane runway beams which support top-running overhead bridge cranes are often made from hot-rolled I sections. In case of light crane service, a flat bar of structural steel is commonly used as crane rail and is attached to the upper flange of the beam’s I section by fillet welds. The rail welds are exposed to multi-axial stresses caused by the local wheel load introduction and the global bending and are, therefore, at risk of fatigue. In contrast to the current Eurocode generation, the new Eurocode for crane runway beam design, prEN 1993-6 (2024), will contain

* Corresponding author. Tel.: +49-355-69-2255. E-mail address: mathias.euler@b-tu.de * Corresponding author. Tel.: +49-355-69-2255. E-mail address: mathias.euler@b-tu.de

2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2025 organizers 2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2025 organizers

2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of Dr Fabien Lefebvre with at least 2 reviewers per paper 10.1016/j.prostr.2025.11.029