Mechanical behaviour of glued-in rods (carbon and glass fibre-reinforced polymers) for timber structures—An analytical and experimental study

Titirla, Magdalini; Michel, Laurent; Ferrier, Emmanuel

doi:10.1016/j.compstruct.2018.09.101

Cited by 24 publications

(9 citation statements)

References 18 publications

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“…They found that the mechanical properties of reinforced beams were improved by reducing the effect of stress concentration. According to Titirla et al [62], the maximum load of the structure had a great relationship with the diameter of FRP bars and the grain direction of the wood. Al-Hayek et al [63] compared beams reinforced with draped CFRP, straight CFRP bars, draped steel wire and straight steel wire.…”

Section: Timber Beams Reinforced With Frp Barsmentioning

confidence: 99%

A Review on Strengthening of Timber Beams Using Fiber Reinforced Polymers

Jian¹,

Cheng²,

Li³

et al. 2022

Journal of Renewable Materials

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Fiber reinforced polymer (FRP) has been used in the construction industry because of its advantages such as high strength, light weight, corrosion resistance, low density and high elasticity. This paper presents a review of bonding techniques adopted to strengthen timber beams using FRP to achieve larger spans. Different methods of bonding between FRP and timber beams have been summarized with a focus on the influencing factors and their effects as well as relevant bond-slip models proposed for fundamental understanding. Experimental investigations to evaluate the flexural performance of timber beams strengthened by FRP bars, sheets and wraps have also been critically reviewed to identify key influencing parameters. Limited research available on the shear performance of FRP reinforced timber beams have been analyzed to determine the influencing factors of the shear performance in timber-FRP beams. The paper finally presents an overall summary of the current-state-of-the-art and proposes some future research directions in the field.

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Section: Timber Beams Reinforced With Frp Barsmentioning

confidence: 99%

A Review on Strengthening of Timber Beams Using Fiber Reinforced Polymers

Jian¹,

Cheng²,

Li³

et al. 2022

Journal of Renewable Materials

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“…The beams of the panels are the part that is being connected with the columns of the structures. The stiffness of these connections can varies as it depends on the type of the connection as Titirla et al have been presented [20][21][22][23], but in this study only the case of a rigid connection was presented.…”

Section: Case Studymentioning

confidence: 99%

Dynamic and Vibroacoustic Response of Timber Floor Panels. Measurements and Non-Linear Numerical Simulations

Titirla¹,

Benakli²,

Larbi³

2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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The present work concerns the dynamic and vibroacoustic response of timber floor panels as well as the study of the effect of material nonlinearities and damping. Each panel is composed of glued laminated beams and wood constituting the floor. The dimensions of the panels are defined to ensure appropriate implementation and transport conditions. For these reasons, the width of the panels is fixed at 2.40 m, and the length is 7.2 m. Two types of floor panels were investigated with and without struts. A numerical approach based on 3D finite element method is used to solve the problem. Our finite element model and the mechanical properties of the used materials are first validated from comparisons with experimental tests carried out in statics [1]. A dynamic non-linear analysis of the timber floor panels has been then conducted under a walking time history and the vibroacoustic response of the system is finally investigated.

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“…CFRPs exhibited consistently higher pull-out loads when glued perpendicular to the grain with a maximum increase up to 26% for a bonded length equivalent to three times the plate width. However, GFRP rods showed a 34% higher axial load capacity in (Titirla et al 2019) (glulam GL24h) compared with CFRP rods at a bonded length of 15D, where D is the rod diameter. The differences in the reported bond strength trends among studies can be attributed to differences in the bond test method ('pull-compression' vs 'pull-pull' test method) and geometry of the FRP reinforcement (rectangular vs circular).…”

Section: Introductionmentioning

confidence: 98%

Cyclic Loading of Glued-In FRP Rods in Timber: Experimental and Analytical Study

Toumpanaki

Ramage

2022

J. Compos. Constr.

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The axial load capacity and stiffness of Carbon Fibre-Reinforced Polymer (CFRP) and Glass Fibre-Reinforced Polymer (GFRP) rods glued-in timber is investigated under cyclic loading as the main design consideration for structures that experience load reversal (e.g. due to wind loading). Load cycles at 20, 40, 60 and 80% of the ultimate load and three repetitions per load cycle were considered. The main parameters examined are the effect of FRP rod, anchorage length and construction scenario. The construction scenarios represent full contact between timber faces, gaps in joints due to long-term effects (e.g. viscoelastic creep) and manufacturing tolerances, and contact with other materials. The GFRP rods exhibit 23% higher axial load capacity and 20% lower axial tensile stiffness than CFRP rods for an embedment length of 5D, where D is the diameter of the rod. The axial load capacity of the GFRP rods tends to plateau with increasing bonded length at anchorage lengths greater than 10D. Small gaps significantly decrease the axial compressive stiffness of the glued-in FRP rods at the first load cycles and the axial stiffness varies along the bonded length. An analytical methodology is presented to describe the bond stress transfer mechanism and the progressive bond degradation. The analytical tensile slip values agree fairly well with the experimental results when debonding takes place at 80% of the ultimate load.

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Mechanical behaviour of glued-in rods (carbon and glass fibre-reinforced polymers) for timber structures—An analytical and experimental study

Cited by 24 publications

References 18 publications

A Review on Strengthening of Timber Beams Using Fiber Reinforced Polymers

A Review on Strengthening of Timber Beams Using Fiber Reinforced Polymers

Dynamic and Vibroacoustic Response of Timber Floor Panels. Measurements and Non-Linear Numerical Simulations

Cyclic Loading of Glued-In FRP Rods in Timber: Experimental and Analytical Study

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