Hybrid joining of jacket structures for offshore wind turbines – Validation under static and dynamic loading at medium and large scale

Albiez, Matthias; Damm, J. Z.; Ummenhofer, Thomas; Ehard, Heinrich; Schüler, Christian; Kaufmann, Marvin; Vallée, Till; Myslicki, Sebastian

doi:10.1016/j.engstruct.2021.113595

Cited by 25 publications

(12 citation statements)

References 35 publications

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“…Special attention is paid to the numerical calculations carried out at KIT to analyse the stresses in a real jacket as well as the experimental investigations on K-joint test specimens with hybrid joints. All research results are fully detailed in [7][8][9].…”

Section: Foundations For Offshore Wind Turbinesmentioning

confidence: 99%

“…The project also involved further investigations of the fatigue and durability of the connection [7,8,23]. These can only be briefly addressed in this paper.…”

Section: Further Investigations Of Fatigue and Ageing Loadsmentioning

confidence: 99%

“…In the context of this contribution, two recently completed research projects are presented in which adhesive bonding was advantageously combined with classic joining processes. First, an innovative hybrid brace connection for offshore jackets is presented which combines welding, bolting and bonding [7,8]. After that, a novel hybrid grouted joint is presented in which inorganic grout materials and organic adhesives are used in combination in lap joints for the first time [9].…”

Section: Introductionmentioning

confidence: 99%

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Hybrid connection technologies for hollow sections in steel construction

2022

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Circular hollow sections (CHS) offer a variety of constructional and architectural advantages. Up to now, hollow section structures have usually been connected by welding, and more rarely by bolting. However, these established connection methods have disadvantages. Despite its great success in the mobility sector, adhesive bonding is not yet used for joining hollow steel sections in steel construction. Adhesive bonding, however, has significant advantages, especially if combined with classical joining processes. To highlight these advantages, this article presents excerpts from the results obtained in two recently completed research projects. First, a hybrid brace connection for hollow section framework structures is presented which combines welding, bolting and adhesive bonding methods. In addition, the loadbearing behaviour of a novel hybrid grouted connection, which advantageously combines adhesive and grout materials, is analysed and discussed in this paper.

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Section: Foundations For Offshore Wind Turbinesmentioning

confidence: 99%

“…The project also involved further investigations of the fatigue and durability of the connection [7,8,23]. These can only be briefly addressed in this paper.…”

Section: Further Investigations Of Fatigue and Ageing Loadsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hybrid connection technologies for hollow sections in steel construction

2022

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“…Static and fatigue tests were recently performed on a large-scale detail of hybrid tubular joints (Figure 6) for an offshore wind turbine in [12]. The tests demonstrated that these kinds of hybrid joints, made by combining adhesives together with welding, can be successfully used in offshore structures, as the fatigue strength is improved.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 6. Large-scale detail of hybrid tubular joints for offshore wind turbine investigated in [12]. Reprinted with permission from ref.…”

Section: Introductionmentioning

confidence: 99%

Review of Fatigue Assessment Approaches for Welded Marine Joints and Structures

Corigliano

Crupi²

2022

Metals

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Welded joints are widely used in many sectors and represent the main joining technique also in the marine industry. The welded joints are sites of high stress concentrations and are subject to severe conditions for the marine environment. The design of marine welded joints has to consider the effects from wave loads, ship motions and loading/unloading operations and corrosion effects. The aim of this scientific work is to discuss about the state of the art of the standards and the approaches for predicting the fatigue life of welded joints used for the marine industry. Several approaches are examined in order to provide an overview and highlight the advantages and limitations of each method. Furthermore, recent advances in welding of dissimilar metals and autonomous welding are considered.

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Experimental test setup design for ultimate limit state evaluation of ductile wrapped composite KK‐joints

Koetsier,

de Vries,

Peeters

et al. 2023

ce papers

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Complex circular hollow section double KK‐joints are widely used in, e.g. offshore wind turbine jackets. As an alternative to conventional welded joints of the CHS multi‐membered structures, wrapped composite joints have shown superior structural performance in previous pilot tests. Experimentally characterizing the joint behaviour under uniplanar loading can be complicated, because of the ductile failure mechanisms of wrapped composite joints and second‐order bending moments. This paper presents the design of a test frame in combination with a conventional tensile 2.5 MN test rig. Ductile joint failure, joint imperfections and second‐order effects are considered in the design. Structural finite element software SOFiSTiK is used to analyse the effects of wrapped joint behaviour and imperfections on the test system and interaction of joint, frame and loading rig behaviours. Non‐linear joint behaviour and misalignments of the braces increased the second‐order effects significantly. Mitigation strategies have been explored to reduce additional bending moments in the KK‐joint. A complete test setup is proposed to perform static experiments on double KK‐joints in uniplanar axial loading conditions.

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Hybrid joining of jacket structures for offshore wind turbines – Validation under static and dynamic loading at medium and large scale

Cited by 25 publications

References 35 publications

Hybrid connection technologies for hollow sections in steel construction

Hybrid connection technologies for hollow sections in steel construction

Review of Fatigue Assessment Approaches for Welded Marine Joints and Structures

Experimental test setup design for ultimate limit state evaluation of ductile wrapped composite KK‐joints

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