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

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Procedia Structural Integrity 57 (2024) 452–460

© 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 A database established in the projects allows to integrate and assess the specified details in the context of the overall approach in EN 1993-1-9 to enable an efficient design, in which the fatigue strength is estimated as accurately as possible. © 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: fatigue resistance, imperfections, butt weld, longitudinal attachment Furthermore, the influence of geometry is investigated for 2 specific details: On one side the plate thickness effect on butt-welded joints could not be confirmed based on the few data available, therefore the results of a meta-study based on tests of various research projects and own tests on butt welds up to 80 mm are presented. On the other side, the length and end geometry of longitudinal attachments was looked at, for the influence of the attachment length and whether the transition radius of the ends larger than 150 mm or only the ground flush of the reinforcement improves the fatigue resistance. Additional tests and evaluations try to give an answer. A database established in the projects allows to integrate and assess the specified details in the context of the overall approach in EN 1993-1-9 to enable an efficient design, in which the fatigue strength is estimated as accurately as possible. © 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: fatigue resistance, imperfections, butt weld, longitudinal attachment Fatigue Design 2023 (FatDes 2023) Various Influences on the Fatigue Resistance of Important Steel Details Gloria Hofmann a *, Helen Bartsch b , Ulrike Kuhlmann a , Markus Feldmann b a University of Stuttgart, Institute of Structural Design, Pfaffenwaldring 7, 70569 Stuttgart, Germany b Institute of Steel Construction, RWTH Aachen University, Mies-van-der-Rohe-Str. 1, 52074 Aachen, Germany Fatigue Design 2023 (FatDes 2023) Various Influences on the Fatigue Resistance of Important Steel Details Gloria Hofmann a *, Helen Bartsch b , Ulrike Kuhlmann a , Markus Feldmann b a University of Stuttgart, Institute of Structural Design, Pfaffenwaldring 7, 70569 Stuttgart, Germany b Institute of Steel Construction, RWTH Aachen University, Mies-van-der-Rohe-Str. 1, 52074 Aachen, Germany Abstract Due to the revision of the Eurocode, two research projects funded by AiF-DASt-FOSTA reinvestigate the detail categories of EN 1993-1-9. Among others, investigations on the influence of weld imperfections on the fatigue strength of typical steel construction details are presented. For this purpose, own fatigue tests were carried out on cruciform joints and transverse stiffeners with internal and external imperfections. Abstract Due to the revision of the Eurocode, two research projects funded by AiF-DASt-FOSTA reinvestigate the detail categories of EN 1993-1-9. Among others, investigations on the influence of weld imperfections on the fatigue strength of typical steel construction details are presented. For this purpose, own fatigue tests were carried out on cruciform joints and transverse stiffeners with internal and external imperfections. Furthermore, the influence of geometry is investigated for 2 specific details: On one side the plate thickness effect on butt-welded joints could not be confirmed based on the few data available, therefore the results of a meta-study based on tests of various research projects and own tests on butt welds up to 80 mm are presented. On the other side, the length and end geometry of longitudinal attachments was looked at, for the influence of the attachment length and whether the transition radius of the ends larger than 150 mm or only the ground flush of the reinforcement improves the fatigue resistance. Additional tests and evaluations try to give an answer.

* Corresponding author. Tel.: +49-711-685-69250; fax: +49-711-685-66236. E-mail address: Gloria.Hofmann@ke.uni-stuttgart.de * Corresponding author. Tel.: +49-711-685-69250; fax: +49-711-685-66236. E-mail address: Gloria.Hofmann@ke.uni-stuttgart.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.2024.03.049