PSI - Issue 47

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

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

Procedia Structural Integrity 47 (2023) 247–252

© 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 IGF27 chairpersons Abstract The compressed outstand parts of steel sections are prone to instability which highly reduces their capacity. To improve the response of the compressed parts, the length of the compressed parts can be reduced by using hollow sections. Material savings can be obtained if the hollow flange is only used for the flanges. The solution of hollow flange beams can be found in several shapes in the literature. A triangular shape of the flanges can be obtained by welding steel plates of different thicknesses to optimize the material consumption. Based on experimental results, the capacity of a hollow flange beam is compared to the analytical relation and the failure mode is discussed in comparison to the resulted moment-displacement curve. © 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) 1. Introduction To answer the particular needs for the performance of an element e.g. rigidity, stability, capacity, built-up elements are assembled either from cold-formed thin walled elements, steel plates or steel profiles. Due to its ease of workability, the hollow flange beams were obtained at the beginning by folding steel sheets to obtain cold-formed members such as Hollow Flange Beams (HFB) produced firstly by Palmer Tube Mills Pty Ltd, Avery et al. (2000). The rigid closed section of the flanges improves the response of the compressed part which are prone to instability. From the idea of avoiding stability problems in the compressed flange, several solutions were studied in the literature. Referred to as Dinobeam or dog-bone shaped cross-section, ten experimental tests were performed on such elements under four standard loading conditions, showing that initial failure was via a material yield mechanism and no damage was observed in the welds Russell et al. (2020). A test program was also conducted on hollow flange beams to determine their capacity under concentrated bearing loads leading to design rules for concentrated bearing loads and combined bearing and bending interaction Hancock et al. (1994). Using dual electric resistance welding and automated continuous roll-forming process, LiteSteel beams were developed and tested to 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 IGF27 chairpersons 27th International Conference on Fracture and Structural Integrity (IGF27) The behavior of steel beams with triangular welded hollow flange Ioan Both a *, Ioan Marginean a , Snejana-Denisa Bacalu-Rus b , Calin-Ioan Birdean c a Politehnica University of Timisoara, Department of Steel Structures and Structural Mechanics, Timisoara, 300224, Romania b LTCPM Arad, Arad, 310426, Romania c Politehnica University of Timisoara, Department of Mechanics and Strength of Materials, Timisoara, 300222, Romania Abstract The compressed outstand parts of steel sections are prone to instability which highly reduces their capacity. To improve the response of the compressed parts, the length of the compressed parts can be reduced by using hollow sections. Material savings can be obtained if the hollow flange is only used for the flanges. The solution of hollow flange beams can be found in several shapes in the literature. A triangular shape of the flanges can be obtained by welding steel plates of different thicknesses to optimize the material consumption. Based on experimental results, the capacity of a hollow flange beam is compared to the analytical relation and the failure mode is discussed in comparison to the resulted moment-displacement curve. © 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 IGF27 chairpersons Keywords: Steel beam; triangular hollow flange; welding; bending. 1. Introduction To answer the particular needs for the performance of an element e.g. rigidity, stability, capacity, built-up elements are assembled either from cold-formed thin walled elements, steel plates or steel profiles. Due to its ease of workability, the hollow flange beams were obtained at the beginning by folding steel sheets to obtain cold-formed members such as Hollow Flange Beams (HFB) produced firstly by Palmer Tube Mills Pty Ltd, Avery et al. (2000). The rigid closed section of the flanges improves the response of the compressed part which are prone to instability. From the idea of avoiding stability problems in the compressed flange, several solutions were studied in the literature. Referred to as Dinobeam or dog-bone shaped cross-section, ten experimental tests were performed on such elements under four standard loading conditions, showing that initial failure was via a material yield mechanism and no damage was observed in the welds Russell et al. (2020). A test program was also conducted on hollow flange beams to determine their capacity under concentrated bearing loads leading to design rules for concentrated bearing loads and combined bearing and bending interaction Hancock et al. (1994). Using dual electric resistance welding and automated continuous roll-forming process, LiteSteel beams were developed and tested to 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 IGF27 chairpersons 27th International Conference on Fracture and Structural Integrity (IGF27) The behavior of steel beams with triangular welded hollow flange Ioan Both a *, Ioan Marginean a , Snejana-Denisa Bacalu-Rus b , Calin-Ioan Birdean c a Politehnica University of Timisoara, Department of Steel Structures and Structural Mechanics, Timisoara, 300224, Romania b LTCPM Arad, Arad, 310426, Romania c Politehnica University of Timisoara, Department of Mechanics and Strength of Materials, Timisoara, 300222, Romania Peer-review under responsibility of the IGF27 chairpersons Keywords: Steel beam; triangular hollow flange; welding; bending.

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 IGF27 chairpersons 10.1016/j.prostr.2023.07.017