PSI - Issue 57

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 57 (2024) 298–306

Fatigue Design 2023 (FatDes 2023) New test-based detail categories for fatigue design of crane runway beams Mathias Euler a, * a Brandenburg University of Technology Cottbus-Senftenberg,Germany. Fatigue Design 2023 (FatDes 2023) New test-based detail categories for fatigue design of crane runway beams Mathias Euler a, * a Brandenburg University of Technology Cottbus-Senftenberg,Germany.

© 2024 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 2023 organizers Abstract Top-running overhead bridge cranes are frequently supported by welded crane runway beams whose wheel loaded constructional details, such as the welded flange-to-web connections and the continuous double fillet welds to fasten the crane rail, are subject to multiaxial fatigue. The fatigue stressing is composed by normal and shear stresses due to the local wheel load introduction and global bending. As the fatigue stressing exhibits a phase shift of the stress components, it is referred to as nonproportional. The currently applicable detail category of welded flange-to-web connections according to EN 1993-1-9 (2005) is theoretically derived and does not appropriately address the specifics of these connections. A classification of rail welds including a detail-related nominal stress formula is missing. A design proposal for both constructional details is presented that is based on fatigue tests on girders with travelling and stationarily pulsating wheel loads to simulate the nonproportional fatigue stressing. To derive new detail categories from the test results, a fatigue failure hypothesis is formulated modifying Findley ’s critical plane approach for the evaluation of welded constructional details with partial penetration and weld root failure on the basis of notch stresses. © 2023 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 2023 organizers Abstract Top-running overhead bridge cranes are frequently supported by welded crane runway beams whose wheel loaded constructional details, such as the welded flange-to-web connections and the continuous double fillet welds to fasten the crane rail, are subject to multiaxial fatigue. The fatigue stressing is composed by normal and shear stresses due to the local wheel load introduction and global bending. As the fatigue stressing exhibits a phase shift of the stress components, it is referred to as nonproportional. The currently applicable detail category of welded flange-to-web connections according to EN 1993-1-9 (2005) is theoretically derived and does not appropriately address the specifics of these connections. A classification of rail welds including a detail-related nominal stress formula is missing. A design proposal for both constructional details is presented that is based on fatigue tests on girders with travelling and stationarily pulsating wheel loads to simulate the nonproportional fatigue stressing. To derive new detail categories from the test results, a fatigue failure hypothesis is formulated modifying Findley ’s critical plane approach for the evaluation of welded constructional details with partial penetration and weld root failure on the basis of notch stresses. © 2023 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 2023 organizers

Keywords: Eurocode 3-6; crane runway beams; flange-to-web connection; continuous rail welds Keywords: Eurocode 3-6; crane runway beams; flange-to-web connection; continuous rail welds

* 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 © 2023 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 2023 organizers 2452-3216 © 2023 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 2023 organizers

2452-3216 © 2024 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 2023 organizers 10.1016/j.prostr.2024.03.032