Experimental and numerical investigation of flexural properties of larch beams reinforced with different layer numbers
DOI:
https://doi.org/10.7764/RDLC.23.1.47Keywords:
wood beam, flexural properties, larch, FRP, finite element analysis.Abstract
Recent applications demonstrated how fiber-reinforced polymer (FRP) composites can improve the structural capabilities of glulam beams, particularly regarding their flexural and shear strength. With the development of precise numerical models, such systems can be optimized. There is currently a dearth of information in the literature on numerical models that can accurately anticipate the nonlinear behavior of low-grade glued laminated timber beams reinforced with FRP. In this study, larch beams were reinforced with carbon fiber reinforced polymer fabric 1, 2 and 3 layers. The effect of the number of floors on the flexural properties of the beams in reinforcement was investigated experimentally and numerically. As a result of the study, the best flexural properties were achieved with 3-layer reinforcement. It was observed that 1- and 2-layer reinforcement compared to the reference beam were also significantly effective. Numerical analyzes gave close values with experimental test results. As a result of comparing the results obtained from the numerical model with the experimental findings, it was concluded that the FRP fabric managed to significantly increase the performance of larch timber. The model is a useful tool for examining the effect of reinforcement coefficient and will be used for optimization of the larch beam.Recent applications demonstrated how fiber-reinforced polymer (FRP) composites can improve the structural capabilities of glulam beams, particularly regarding their flexural and shear strength. With the development of precise numerical models, such systems can be optimized. There is currently a dearth of information in the literature on numerical models that can accurately anticipate the nonlinear behavior of low-grade glued laminated timber beams reinforced with FRP. In this study, larch beams were reinforced with carbon fiber reinforced polymer fabric 1, 2 and 3 layers. The effect of the number of floors on the flexural properties of the beams in reinforcement was investigated experimentally and numerically. As a result of the study, the best flexural properties were achieved with 3-layer reinforcement. It was observed that 1- and 2-layer reinforcement compared to the reference beam were also significantly effective. Numerical analyzes gave close values with experimental test results. As a result of comparing the results obtained from the numerical model with the experimental findings, it was concluded that the FRP fabric managed to significantly increase the performance of larch timber. The model is a useful tool for examining the effect of reinforcement coefficient and will be used for optimization of the larch beam.
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Aydın, E., Boru, E., & Aydın, F. (2021). Effects of FRP bar type and fiber reinforced concrete on the flexural behavior of hybrid beams. Construction and Building Materials, 279, 122407.
BASF, (2022). https://www.basf.com/tr/tr/products/furniture-and-wood.html, Date of Access: 29.12.2022
Buell, T.W., & Saadatmanesh, H. (2005). Strengthening timber bridge beams using carbon fiber. Journal of Structural Engineering, 131(1), 173–87.
Bulleit, W.M., Sandberg, L.B., & Woods, G.J. (1989). Steel-reinforced glued laminated timber. Journal of Structural Engineering, 115(2), 433–44.
Cankal, D., Sakar, G., & Kürşat Çelik, H. (2023). A criticism on strengthening glued laminated timber beams with fibre reinforcement polymers, numerical comparisons between different modelling techniques and strengthening configurations. Revista de la construcción, 22(3), 661-678.
Cunha, C., Tenório, M., Lima, D. F., Rebouças, A., Neves, L. C., & Branco, J. M. (2021). Mechanical characterization of iroko wood using small speci-mens. Buildings, 11(3), 116.
De Lorenzis, L., Scialpi, V., & La Tegola, A. (2005). Analytical and experimental study on bonded-in CFRP bars in glulam wood, Composite Part B: Engi-neering, 36 (4), 279– 289.
Gentry, T.R. (2011). Performance of glued-laminated timbers with FRP shear and flexural reinforcement, Journal of Composites For Construction, 15 (5), 861–870.
Gilfillan, J.R., Gilbert, S.G., & Patrick GR. (2003). The use of FRP composites in enhancing the structural behavior of timber beams. Journal of Reinforced Plastics and Composites, 22(15),1373–88.
Green, D. W., Winandy, J. E., & Kretschmann, D. E. (2019). Mechanical properties of wood. Wood handbook: wood as an engineering material. Madison, WI: USDA Forest Service, Forest Products Laboratory, 1999. General technical report FPL, 4.1-4.45, 113.
Hoyle, R.J. (1975). Steel-reinforced wood beam design. Forest Product Journal, 25(4),17–23.
Işleyen, Ü. K., & Kesik, H. İ. (2021). Experimental and numerical analysis of compression and bending strength of old wood reinforced with CFRP strips. Structures, 33, 259-271.
Johns, K.C., Lacroix, S. (2000). Composite reinforcement of timber in bending. Canadian Journal Civil Engineering, 27(5), 899–906.
Johnsson, H., Blanksvard, T., & Carolin, A. (2006). Glulam members strengthened by carbon fibre reinforcement, Materials and Structures, 40, 47–56.
Kabaş, H. T., Kusain, F. E., & Anıl, Ö. (2023). Experimental behavior of masonry infilled RC frames with openings strengthened by using CFRP strip. Composite Structures, 312, 116873.
Kasal, A., Efe, H., Dizel, T. (2010). Determination of the bending strength and modulus of elasticity of solid wood and laminated veneer lumber, Journal of Polytechnic, 13 (3), 183-190.
Kilincarslan, Ş., & Simsek Turker, Y. Ş. (2022). Strengthening of solid beam with fiber reinforced polymers. Turkish Journal of Engineering, 7(3), 166-171.
Kilincarslan, S., & Simşek Turker, Y. (2021). Experimental investigation of the rotational behaviour of glulam column-beam joints reinforced with fiber reinforced polymer composites.Composite Structures,2 62,113612.
Kilincarslan, Ş., Simşek Turker, Y. (2023). Experimental and Numerical Investigation of Flexural Properties of Solid Wood Materials Reinforced with Various FRP. Sakarya University Journal of Science, 27(4), 895-901.
Kilinçarslan, S., Turker, Y. S., & Avcar, M. (2023). Numerical and Experimental evaluation of the mechanical behavior of FRP-strengthened solid and glulam timber beams. Journal of Engineering Management and Systems Engineering, 2(3), 158-169.
Kilinçarslan, Ş., Turker, Y., & Ince, M. (2021). Prediction of flexural properties of wood material reinforced with various FRP fabrics by artificial neural networks. Duzce University Journal of Science and Technology, 9(6), 188-194.
Mark R. (1961). Wood-aluminum beams within and beyond the elastic range. Forest Product Journal, 11(10), 477–84.
Micelli, F., Scialpi, V., & La Tegola, A. (2005). Flexural reinforcement of glulam timber beams and joints with carbon fiber-reinforced polymer rods, Jour-nal of Composites for Construction, 4 (9), 337–347.
Mohmmed, J. H., Mahmood, N. Y., Ali, M., & Zainulabdeen, A. A. (2020). Buckling and bending properties of aluminium plate with multiple cracks. Archives of Materials Science and Engineering, 106 (2).
Mansour, W., Li, W., Wang, P., Fame, C. M., Tam, L. H., Lu, Y., & Elwakkad, N. Y. (2024). Improving the flexural response of timber beams using exter-nally bonded carbon fiber-reinforced polymer (CFRP) Sheets. Materials, 17(2), 321.
Muratoğlu, A., Uysal, B., & Kurt, S. (2016). Reinforcement of wooden structural elements with carbon fiber reinforced polymers (CFRP) in restoration. Selcuk- Technical Journal, 1219-1240.
Pupsys, T., Corradi, M., Borri, A., & Amess, L. (2017). Bending reinforcement of full-scale timber beams with mechanically attached GFRP composite plates. Key Engineering Materials, 747, 212-219.
Radford, D.W., Van Goethem, D., Gutkowski, R.M. (2002). Peterson ML. Composite repair of timber structures. Construction and Building Materials, 16, 417–25.
Sahin, C., Topay, M., & Var, A. A. (2020). A study on some wood species for landscape applications: surface color, hardness and roughness changes ato utdoor conditions. Wood Research, 65(3), 395-404
Sahin, H. T., Arslan, M. B., Korkut, S., & Sahin, C. (2011). Colour changes of heat‐treated woods of red‐budmaple, european hophornbeam and oak. ColorResearch & Application, 36(6), 462-466.
Schober, K.U., Rautenstrauch, K. (2005). Experimental investigations on flexural strengthening of timber structures with CFRP. In: Proceedings of the International symposium on bond behaviour of FRP in structures (BBFS 2005).
Simsek Turker, Y., Kılıncarslan, Ş. (2023). Effect of the wrapping layers number and length on the flexural properties of Chestnut beams reinforced with Basalt-FRP. Gazi Journal of Engineering Sciences, 9, 23-30.
Sliker, A. (1962). Reinforced wood laminated beams. Forest Product Journal, 12(1), 91–6.
Sutcu, A., & Cambazoglu, M. (2023). Modular wooden house production to solve the emergency shelter need after the earthquake, academic recommen-dations for the aftermath of Kahramanmaraş centered earthquakes, Ozgur Publishing Distribution, 259-272p.
TS 2474. (1976). Determination of Static Flexural Strength of Wood, Turkish Standards Institute, Ankara,Turkiye
TS 2478. (1976). Determination of Elasticity Modulus of Wood in Static Bending, Turkish Standards Institute, Ankara Turkiye.
Wdowiak-Postulak, A. (2022). Strengthening of structural flexural glued laminated beams of ashlar with cords and carbon laminates. Materials, 15(23), 8303.
Wdowiak-Postulak, A. (2023). Numerical, theoretical and experimental models of the static performance of timber beams reinforced with steel, basalt and glass pre-stressed bars. Composite Structures, 305, 116479.
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