Experimental and statistical analysis of spruce timber beams reinforced with CFRP fabric

Analysis of Modulus of Elasticity of Spruce Beams Under Bending With and Without Fibre Reinforcement

“…The investigation was supplemented with 8 beams without reinforcement in addition to the analysis in Andor et al (2015) for the sake of easier comparison, therefore a total of sixteen nonreinforced beams were analysed. A total of fifty-two specimens were prepared, of which thirty-six with various amounts of CFRP fabric (Tab.…”

“…species, amount and material of fibres, shape and arrangement of reinforcement, size of specimens, etc. The aim of the research was to conduct experiments on timber beams reinforced with CFRP in order to assess the potential of this technique particularly with respect to solid beams made of Norway spruce, a species native and widespread in Europe (Andor et al 2015). The reinforcement was chosen so that it was easy to apply in three different amounts along the full length.…”

“…A detailed statistical analysis has also been conducted in Andor et al (2015), that has shown that the behaviour of reinforced beams was significantly affected by the quality of the wood material. A distinction can be made within the test specimens based on the obvious presence of knots and invisible defects, which most likely affects the potential in reinforcement.…”

Bending Stiffness, Load-Bearing Capacity and Flexural Rigidity of Slender Hybrid Wood-Based Beams

“…Over the last twenty years, many studies have been performed with regard to the flexural rigidity and load-bearing capacity of hybrid beams; not only experimentally [5][6][7][8], but also analytically [9][10][11][12][13][14] and numerically [15][16][17][18][19]. In most of the mentioned studies much larger cross sections than those used for windows were investigated (e.g., up to 500 mm in height) [12,15].…”

“…Different reinforcing materials have been used in many studies to improve the bending stiffness and load-bearing capacity of wooden beams. Steel profiles [5,9,12], glass-fibre reinforced polymer profiles (GFRP (glass-fibre reinforced polymer) profiles) [6,14,18], and carbon-fibre reinforced polymer profiles (CFRP (carbon-fibre reinforced polymer) profiles) [7,11,15,19] are the most common, but the Forests 2018, 9,703 3 of 16 effect of many others has also been investigated; e.g., basalt fibres [13], hemp, flax, basalt, and bamboo fibre reinforcements [21], as well as concrete in combination with wood [22].…”