Hybrid grouted joints: Load bearing and failure behaviour under static, axial loading

Boretzki, Jakob; Albiez, Matthias; Myslicki, Sebastian; Vallée, Till; Ummenhofer, Thomas

doi:10.1016/j.conbuildmat.2023.134691

Cited by 4 publications

(2 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While bonding in timber construction has been state-of-the-art for decades [ 19 ], bonding in steel construction has been the subject of intensive research in recent years. Both new types of bonded connections [ 20 , 21 ] for steel structures and hybrid joining methods [ 22 ], combining grouts and adhesives [ 23 , 24 ] and bolts and adhesives [ 25 , 26 ] are being comprehensively investigated.…”

Section: Introductionmentioning

confidence: 99%

Bending Behavior of Hybrid Timber–Steel Beams

Haase,

Aurand,

Boretzki

et al. 2024

Materials

Self Cite

View full text Add to dashboard Cite

Driven by climate change and the need for a more sustainable construction sector, policy is increasingly demanding and promoting timber hybrid construction methods. In the German state of Baden-Württemberg, every new public building has to be of timber or timber hybrid construction (Holzbauoffensive BW). The objective of multi-story buildings with large floor spans can only be achieved in a resource-efficient way by hybrid constructions combining timber and steel components. A research project recently completed at the Karlsruhe Institute of Technology was aimed at the development and systematic investigation of hybrid bending beams in which an advantageous combination of the materials steel and timber is used. For this purpose, steel profiles are integrated into timber cross-sections in a shear-resistant manner by adhesive bonding. As part of the experimental, numerical and analytical investigations, different cross-sections of steel and timber, as well as different construction materials, were considered (GL24h, LVL48p, LVL80p, S355 and S420). The results of large-scale four-point bending tests illustrate the potential of this new hybrid construction method. Depending on the geometry and material combinations tested, the bending stiffness could be increased by up to 250%, and the load-carrying capacity by up to 120%, compared to a glulam beam with identical dimensions.

show abstract

Section: Introductionmentioning

confidence: 99%

Bending Behavior of Hybrid Timber–Steel Beams

Haase,

Aurand,

Boretzki

et al. 2024

Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Collar and doubler plates [4][5][6][7][8][9][10][11][12], FRP reinforcement [13][14][15][16], and internal rings [17][18][19][20] are some of the options available for strengthening. Concrete filling [21], hybrid grouting [22], and hybrid FRP-concrete tubular joints [23] have also been used for the strength enhancement of offshore structures. These alternatives are commonly utilized when the joint's strength is inadequate during development.…”

Section: Introductionmentioning

confidence: 99%

Ultimate Strength of Internal Ring-Reinforced KT Joints Under Brace Axial Compression

Rasul,

Karuppanan,

Perumal

et al. 2024

Civ Eng J

View full text Add to dashboard Cite

Internal ring stiffeners are frequently used to improve the ultimate strength of tubular joints in offshore structures. However, there is a noticeable absence of specific design guidance regarding the assessment of their ultimate strengths in prominent offshore codes and design guides. No equations are available to determine the ultimate strength of internal ring-reinforced KT joints. This work developed equations to determine the ultimate strength and the strength ratio of internal ring-reinforced KT joints based on numerical models and parametric studies comprising ring parameters and joint parameters. Specifically, a finite element model and a response surface approach with eight parameters (λ, δ, ψ, ζ, θ, τ, γ, and β) as inputs and two outputs (ultimate strength and the strength ratio) were evaluated since efficient response surface methodology has been proven to give precise and comprehensive predictions. KT-joint with parameters λ=0.9111, δ=0.2, ψ=0.7030, ζ=0.3, θ=45°, τ=0.90, γ=16.25, and β=0.6 has the maximum ultimate strength, and the KT-joint with parameters: λ=1, δ=0.2, ψ=0.8, ζ=0.5697, θ=45°, τ=0.61, γ=24, and β=0.41 has the maximum strength ratio. The KT-joints with the optimized parameters were validated through finite element analysis. The percentage difference was less than 1.7%, indicating the applicability and high accuracy of the response surface methodology. Doi: 10.28991/CEJ-2024-010-05-012 Full Text: PDF

show abstract

Fatigue behaviour of hybrid grouted joints under axial loading

Boretzki,

Albiez,

Damm

et al. 2023

ce papers

Self Cite

View full text Add to dashboard Cite

Steel constructions made of circular hollow sections are commonly joined by welding or ring‐flange bolting. An additional, novel joining method is the so‐called hybrid grouted joint. The hybrid grouted joint is characterised by its multi‐layered composition. In contrast to state‐of‐the‐art grouted joints, hybrid grouted joints include thin adhesive layers, which are applied on the steel surfaces prior to grouting. Sand grains are embedded in the yet uncured adhesive. After the curing of the adhesive, the surface has a high degree of roughness. This allows a high‐performance interlock between fine grain grout and the adhesively bonded sand granules across the contact surfaces in the overlap area. The ability to transfer loads across a wide area with low stress concentrations makes the hybrid grouted joint a promising joint alternative especially regarding the fatigue performance. This paper summarises the main findings concerning fatigue behaviour of the hybrid grouted joint under axial loading. Wöhler diagrams were determined in numerous fatigue tests for two combinations of adhesive and grout.

show abstract

Hybrid grouted joints: Load bearing and failure behaviour under static, axial loading

Cited by 4 publications

References 19 publications

Bending Behavior of Hybrid Timber–Steel Beams

Bending Behavior of Hybrid Timber–Steel Beams

Ultimate Strength of Internal Ring-Reinforced KT Joints Under Brace Axial Compression

Fatigue behaviour of hybrid grouted joints under axial loading

Contact Info

Product

Resources

About