Flexural reinforcement of glulam beams with CFRP plates

Glišović, Ivan; Stevanović, Boško; Todorović, Marija

doi:10.1617/s11527-015-0690-7

Cited by 26 publications

(11 citation statements)

References 22 publications

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“…The low increases were attributed to the higher grammage of synthetic fibers that hindered the adhesive penetration, reducing its adhesion into the timber, consequently resulting in lower values of resistance. However, the decrease in shear strength on T3 and T5 are not observed in the literature when using the epoxy resin (RAFTERY; WHELAN, 2014;GLIŠOVIĆ et al, 2015a;GLIŠOVIĆ et al, 2015b;CHEW et al, 2015). As the ruptures starting in the laminated timbers, it can explain the loss of resistance.…”

Section: Discussionmentioning

confidence: 98%

Glued Laminated Timber of Paricá Reinforced With Synthetic Fibers

Rosa

Terezo

Mascia

et al. 2019

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Madeira laminada colada de paricá reforçada com fibras sintéticas. O objetivo foi avaliar o desempenho de madeiras laminada (MLC) de Schizolobium parahyba var. amazonicum (paricá) reforçadas com fibras de vidro ou carbono coladas com adesivo resorcinol através de ensaios de flexão estática, cisalhamento e tração paralela e perpendicular às fibras e linha de colagem e comparar os resultados experimentais com os analíticos. Os ensaios de flexão foram divididos em 5 Tratamentos (T) compostos por 6 corpos de prova, sendo T1 o controle sem reforço de fibras, T2 com fibra de vidro de 110 g•m-2 de gramatura, T3 com fibra de vidro de 200 g•m-2 , T4 fibra de vidro de 330 g•m-2 e T5 com reforço de fibra de carbono de 200 g•m-2. O Módulo de Elasticidade Longitudinal-EW dos ensaios de flexão foi estimado por cálculos analítico e experimental. Os resultados foram analisados pelo teste de Tukey com 5% de significância. Não houve um aumento significativo no valor do EW e na resistência à flexão, na resistência à tração paralela, perpendicular ou cisalhamento na linha de colagem para todos os tratamentos. O cálculo analítico resultou num deslocamento significativamente menor do que o experimental. O adesivo resorcinol teve desempenho satisfatório à flexão, sem rupturas por tração ou cisalhamento.

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Section: Discussionmentioning

confidence: 98%

Glued Laminated Timber of Paricá Reinforced With Synthetic Fibers

Rosa

Terezo

Mascia

et al. 2019

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“…In this section a summary of the experiment on which the numerical modelling was based is given. Further details can be found in Glisović et al (2016).…”

Section: Experimental Workmentioning

confidence: 99%

Numerical Analysis of Glulam Beams Reinforced With CFRP Plates

Glišović

Pavlović

Stevanović

et al. 2017

Journal of Civil Engineering and Management

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This paper presents an analysis of bending behaviour of glued laminated timber (glulam) beams reinforced with carbon fibre reinforced polymer (CFRP) plates, based on finite element numerical modelling. Nonlinear 3-dimensional model was developed and validated by experimental tests carried out on unreinforced beams and beams reinforced with two different reinforcement arrangements. Suitable constitutive relationships for each material were utilised in the model, as well as anisotropic plasticity theory for timber in compression. Adhesive bond between CFRP plate and timber was modelled as a perfect connection. Beam failure in the model was defined by maximum stress criterion. The predicted behaviour of beams has shown good agreement with the experimental results in relation to load-deflection relationship, ultimate load, elastic stiffness and strain profile distribution. The non-linear behaviour of reinforced beams before failure was also achieved in the numerical analysis, confirming the finite element model to be accurate past the linear-elastic range. Experimentally tested reinforced beams usually failed in tensile zone after compressive plasticization of top lamination, which was also simulated in the numerical model. The results proved that the load carrying capacity, stiffness and ductility of glulam beams were successfully increased by addition of CFRP plate at tension side of the section.

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“…The last two authors [ 41 , 42 ] conducted a detailed statistical analysis of the results. Glisovic [ 43 , 44 ] tested glued laminated timber reinforced with CFRP in various configurations such as those presented by Schober ( Figure 4 b and Figure 5 d,e). In another work [ 45 ], he proposed FE modelling as performed by Nowak [ 35 ] and Khelifa [ 46 ].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Glue Cohesive Stiffness on the Elastic Performance of Bent Wood–CFRP Beams

Kawecki

Podgórski

2020

Materials

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This paper presents experimental, theoretical and numerical studies of wood-CFRP beams bonded with polyurethane (PUR) adhesive. The analyses include two types of CFRP (carbon fibre-reinforced polymer) strengthening configurations and pure glue laminated timber beams as a reference. Through detailed analyses of a double-lap connection on blocks with and without CFRP strips, the authors state that neglecting the cohesive stiffness of adhesive layers may lead to an overestimation of an overall beam’s stiffness. This is significant with wood–CFRP connections, which showed values two times lower than with wood–wood connections. Theoretical modelling of the equivalent area used in a theory of composites provided much stiffer behaviour of the beams than in laboratory experiments. It proves that a PUR glue eliminates the possibility of using simple models that assume a perfect connection between bonded parts. These conclusions led the authors to use the finite element method (FEM) to take into account the cohesive stiffness. The FEM, based on the properties obtained from a double-lap joint analysis, allowed for the precise prediction of the elastic stiffness of the beams.

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Flexural reinforcement of glulam beams with CFRP plates

Cited by 26 publications

References 22 publications

Glued Laminated Timber of Paricá Reinforced With Synthetic Fibers

Glued Laminated Timber of Paricá Reinforced With Synthetic Fibers

Numerical Analysis of Glulam Beams Reinforced With CFRP Plates

The Effect of Glue Cohesive Stiffness on the Elastic Performance of Bent Wood–CFRP Beams

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