Theoretical and Numerical Analyses of Steel-timber Composite Beams with LVL Slabs

Strzelecka, Julia; Polus, Łukasz; Chybiński, Marcin

doi:10.59440/ceer/172510

Cited by 4 publications

(3 citation statements)

References 53 publications

(55 reference statements)

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“…Huang et al [ 21 ] analyzed the influence of atmospheric and hydrothermal factors on the behavior of LVL beams with a hybrid glass-flax composite, observing a decrease in bending strength with an increase in beam ductility. Strzelecka et al [ 22 ] conducted theoretical and numerical studies on the use of composite steel-veneer beams consisting of a steel section and an LVL plate. The behavior of layered wooden beams in fire conditions was presented in the work [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Numerical, Theoretical, and Experimental Analysis of LVL-CFRP Sandwich Structure

Bakalarz,

Kossakowski

2023

Materials

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Optimization of structural elements via composition of different components is a significant scientific and practical point-of-view problem aimed at obtaining more economical and environmentally friendly solutions. This paper presents the results of a static work analysis of small-size laminated veneer lumber (LVL) beams reinforced by a Carbon Fiber Reinforced Polymer (CFRP) sheet. The nominal dimensions of LVL beams were 45 × 45 × 850 mm, and 0.333- and 0.666-mm thick reinforcement layers were used. The reinforcement was applied on opposite sides of the cross section obtaining a sandwich-type structure. An epoxy resin was used as a bonding layer. The bending tests were conducted in the so-called four-point bending static scheme in edgewise and flatwise conditions. The results of experimental tests confirmed the validity of this combination of materials. The highest load-bearing capacity was obtained for configuration, where CFRP sheets with a thickness of 0.666 mm were placed on the sides of the core, parallel to the direction of loading and the veneer’s grain in the core. The increase in this case was up to a maximum of 57% compared to the core alone. The highest bending stiffness increase, 182% compared to the core alone, involves placing two layers of sheets perpendicular to the direction of loading, i.e., on the upper and lower surfaces. The presented novel sandwich structure can be competitive against traditional steel and reinforced concrete elements in civil engineering and can be utilized as beams or slabs.

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Section: Introductionmentioning

confidence: 99%

Numerical, Theoretical, and Experimental Analysis of LVL-CFRP Sandwich Structure

Bakalarz,

Kossakowski

2023

Materials

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“…Composite beams can be designed analytically assuming a stiff connection method. This shows the importance of the joining technology used [ 18 ]. Adhesive bonding is particularly important in this context.…”

Section: Introductionmentioning

confidence: 99%

Bending Behavior of Hybrid Timber–Steel Beams

Haase,

Aurand,

Boretzki

et al. 2024

Materials

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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.

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“…Long-term tests of hybrid bending beams have shown that bending stiffness and load-bearing capacity can be significantly increased (3–4 times) compared to pure timber beams. The importance of material joining technology has been confirmed [ 6 ]. In this context, bonding is particularly important.…”

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confidence: 99%