Experimental investigation of glued-laminated timber beams with Vectran-FRP reinforcement

Donadon, Bruno Fazendeiro; Mascia, Nilson Tadeu; Vilela, Ramon; Trautwein, Leandro Mouta

doi:10.1016/j.engstruct.2019.109818

Cited by 31 publications

(10 citation statements)

References 20 publications

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“…When bamboo scrimber is used as a flexural member, it has the disadvantages of insufficient bearing capacity, low bending rigidity, and weak spanning ability similar to that of wood (Kumar et al, 2016;Li et al, 2018b;Yu et al, 2017;Zhou et al, 2021). The reinforcement method of wood bending members has been developed by many researchers, and various materials, such as steel (De Luca and Marano, 2012), fiber composite materials (Borri and Corradi, 2011;D'Ambrisi et al, 2014;Donadon et al, 2020;Dourado et al, 2012;Ghanbari-Ghazijahani et al, 2020), and bamboo (Chen et al, 2021c), have been explored for the reinforcement. For instance, Glišović (2015) and Hoseinpour et al (2018) glued fibre-reinforced polymer (FRP) on the bottom of the glulam beam to study the effect of FRP on the bending performance of the glulam beam.…”

Section: Introductionmentioning

confidence: 99%

Experimental and analytical investigations on flexural behavior of bamboo beams strengthened with steel bars

Zhao

Wei

Yan

et al. 2021

Advances in Structural Engineering

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The embedding of steel bars is proposed to enhance the load-bearing performance of bamboo beams. Based on laboratory tests, the bending behavior of bamboo beams reinforced with steel bars or prestressed steel bars was analyzed using finite element software. Comparing the finite element simulation results with those measured in tests, it can be found that the load–displacement curves coincide with each other, and the strain development processes in the mid-span are basically the same. The prediction by the finite element simulation has good accuracy. The embedding of steel bars and prestressed steel bars can effectively improve the ultimate bearing capacity (up to 27.0%), bending stiffness at the serviceability limit state (up to 42.61%), ductility (up to 22.9%), and material utilization efficiency (up to 34.1%) for the bamboo beams. The embedding of steel bars makes the bamboo in the compression zone of the beams develop with higher efficiency, and applying the prestress for steel bars can produce reverse bending deformation and reduce the actual deflection for the reinforced bamboo beam under service load. Under the same reinforcement ratio, the prestress level has a relatively small influence on the ultimate bearing capacity (up to 4.5%) and stiffness (up to 4.5%) of the reinforced beam.

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Section: Introductionmentioning

confidence: 99%

Experimental and analytical investigations on flexural behavior of bamboo beams strengthened with steel bars

Zhao

Wei

Yan

et al. 2021

Advances in Structural Engineering

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“…Timber applications in the construction industry are limited due to the material natural defects, and the necessity to obtain industrially applicable members of proper dimensions [ 1 , 2 ]. Tests have been performed to provide timber with improved structural properties.…”

Section: Introductionmentioning

confidence: 99%

“…Tests have been performed to provide timber with improved structural properties. In the tests, timber was combined with other materials, thus creating composites with improved mechanical properties [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

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Basalt Fibre Reinforcement of Bent Heterogeneous Glued Laminated Beams

Wdowiak-Postulak

2020

Materials

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The purpose of this paper is to demonstrate the properties of glued laminated beams made in diverse configurations of timber quality classes, reinforced using a new technique that is cheaper and easy to apply. The aim of the experimental investigations was to enhance reinforcement effectiveness and rigidity of glued laminated beams. The tests consisted of four-point bending of large-scale specimens reinforced with basalt fibres (BFRP). The tests were meant to obtain images of failure, the load–displacement relation and load carrying capacity of basalt fibres depending on the reinforcement ratio. The tests, which concerned low and average quality timber beams, were conducted in a few stages. The aim of the study was to popularize and increase the use of low-quality timber harvested from reafforested areas for structural applications. In the study, theoretical and numerical analysis was carried out for reinforced and unreinforced elements in various configurations of wood quality classes. The aim was to compare the results with the findings of experimental tests. Based on the tests, it was found that the load carrying capacity of beams reinforced with basalt fibre was higher by, respectively, 13% and 20% than that of reference beams, while their rigidity improved by, respectively, 9.99% and 17.13%. The experimental tests confirmed that basalt fibres are an effective structural reinforcement of structural timber with reduced mechanical properties.

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“…[3][4][5] These properties are essential for the reinforcement of fiber/polyurethane composites by facilitating their wide applications in the aviation, marine, airship, and automobile industries. [6][7][8][9] However, due to their smooth surface and scarce surface-active groups, TLCP fibers display poor interfacial adhesion with almost all commercially available resins. 10 Thus, the adhesive properties of TLCP fibers with other materials must be improved to enhance the final strength of the composite material.Previously reported methods for increasing TLCP fiber interfacial adhesion include surface coating, [11][12][13]…”

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confidence: 99%

Effect of 2-phenoxyethanol pre-treatment on structure and adhesion properties of thermotropic liquid crystal polyarylate fibers

Chen

Liu

Sheng

et al. 2021

Textile Research Journal

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This study investigated the surface modification of thermotropic liquid crystal polyarylate (TLCP) fibers by 2-phenoxyethanol pre-treatment, specifically, whether it enhanced their interfacial adhesive properties. The surface chemical compositions and microstructures of both control and 2-phenoxyethanol pre-treated TLCP fibers were characterized by X-ray photoelectron spectroscopy, scanning electron microscopy, and atomic force microscopy. Furthermore, thermal, dyeing, and adhesion properties of both control and 2-phenoxyethanol pre-treated fibers were compared by thermogravimetric analysis, colorimetry, and universal material testing system, respectively. The results indicated that 2-phenoxyethanol pre-treatment increased the surface-anchored oxygen atom amount: the oxygen to carbon atomic ratio at the surface of the TLCP fibers increased from 0.17 to 0.22. However, 2-phenoxyethanol pre-treatment showed almost no effect on the thermal stability and mechanical properties of the TLCP fibers. The peeling strength of the 2-phenoxyethanol pre-treated TLCP fabric was around twice that of the control TLCP fabric.

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Experimental investigation of glued-laminated timber beams with Vectran-FRP reinforcement

Cited by 31 publications

References 20 publications

Experimental and analytical investigations on flexural behavior of bamboo beams strengthened with steel bars

Experimental and analytical investigations on flexural behavior of bamboo beams strengthened with steel bars

Basalt Fibre Reinforcement of Bent Heterogeneous Glued Laminated Beams

Effect of 2-phenoxyethanol pre-treatment on structure and adhesion properties of thermotropic liquid crystal polyarylate fibers

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