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) 87–93

© 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 This paper presents the results of an experimental program on an in-line connection for rectangular hollow sections which stand as reference for the validation of a finite element model. The in-line connections are a structural solution for joining steel elements where the bolting assemblies are not visible. The rigidity and capacity of the joint is limited due to the reduced size of the joint. A numerical model is defined for further studies on the influence of the preload in the bolts, the thickness of the endplates, and the manhole provided for bolt tightening. The results show the small influence of the bolt preload but the end plate thickness is of major importance. A reduction of the assembly rigidity is also caused by the manhole. © 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: : in-line connection, experimental test, finite element model, rigidity, parametric study; 1. Introduction Hollow sections, rectangular or circular, are usually welded to provide an atractive aesthetic aspect to avoid visible bulky bolted connections. Nevertheless, bolted connections can provide excellent capacity and rigidity if used for hollow sections with end plates extended outside of the profile perimeter as presented by Liu et.al. (2018). To reduce the erecting time and keep the element continuity aspect of the joint, bolted connection with the bolts positioned inside the profile perimeter can be used but their response in terms of rigidity and capacity is limited. Welded joint for hollow sections are of main interest for T joints where the initial rotational stiffness of the joints should be known to obtain the reliable moment distribution between the members of the frame as showed by Garifullin et. al. (2017). This aspect is also of interest for high strength steel elements presented by Garifullin (2018). The failure mode of the T joints s the push-pull local mechanism for which design methods were suggested by Szlendak (1991), but the in-line connection failure mode is very different as the web of the element is not an influencing factor. 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 Abstract This paper presents the results of an experimental program on an in-line connection for rectangular hollow sections which stand as reference for the validation of a finite element model. The in-line connections are a structural solution for joining steel elements where the bolting assemblies are not visible. The rigidity and capacity of the joint is limited due to the reduced size of the joint. A numerical model is defined for further studies on the influence of the preload in the bolts, the thickness of the endplates, and the manhole provided for bolt tightening. The results show the small influence of the bolt preload but the end plate thickness is of major importance. A reduction of the assembly rigidity is also caused by the manhole. © 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: : in-line connection, experimental test, finite element model, rigidity, parametric study; 1. Introduction Hollow sections, rectangular or circular, are usually welded to provide an atractive aesthetic aspect to avoid visible bulky bolted connections. Nevertheless, bolted connections can provide excellent capacity and rigidity if used for hollow sections with end plates extended outside of the profile perimeter as presented by Liu et.al. (2018). To reduce the erecting time and keep the element continuity aspect of the joint, bolted connection with the bolts positioned inside the profile perimeter can be used but their response in terms of rigidity and capacity is limited. Welded joint for hollow sections are of main interest for T joints where the initial rotational stiffness of the joints should be known to obtain the reliable moment distribution between the members of the frame as showed by Garifullin et. al. (2017). This aspect is also of interest for high strength steel elements presented by Garifullin (2018). The failure mode of the T joints s the push-pull local mechanism for which design methods were suggested by Szlendak (1991), but the in-line connection failure mode is very different as the web of the element is not an influencing factor. 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) Numerical analysis of an in-line connection for hollow sections Calin-Ioan Birdean a , Ioan Both b , Ioan Marginean b , Anghel Cernescu a a Politehnica University of Timisoara, Department of Mechanics and Strength of Materials, Timisoara, 300224, Romania b Politehnica University of Timisoara, Department of Steel Structures and Structural mechanics, Timisoara, 300224, Romania 27th International Conference on Fracture and Structural Integrity (IGF27) Numerical analysis of an in-line connection for hollow sections Calin-Ioan Birdean a , Ioan Both b , Ioan Marginean b , Anghel Cernescu a a Politehnica University of Timisoara, Department of Mechanics and Strength of Materials, Timisoara, 300224, Romania b Politehnica University of Timisoara, Department of Steel Structures and Structural mechanics, Timisoara, 300224, Romania

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.2023.06.045