Toughness of Timber Beams Strengthened with Jute Fibers
Article Sidebar
Main Article Content
Abstract
This research involves investigating the toughness behavior of timber beams strengthened by jute fibers with various forms of strengthening. Ten timber specimens with dimensions (70×100×1000) mm are divided into four groups and loaded under a third point loading. The experimental program was carried out to investigate shear and flexural strengthening effects on toughness, toughness indices, ultimate loads, and the mid-span deflection of the tested beams. One beam as a control beam (un-strengthened beam), four specimens are wrapped in U technique in single and double layers along the whole length of the beam in full and strips wrapping technique, three specimens are wrapped in full technique along the whole length of the beam in full and strips wrapping technique, three timber specimens wrapped in flexural strengthening technique with two, four, and six layers of jute fibers. The results show that jute fibers strengthening increases the toughness ratios of timber beams by about (175%-320%), (190%-401%), and (106%-240%) for U, full, and flexural strengthening techniques, respectively, at the ultimate loads compared with the control beam. Furthermore, it is found that the highest toughness ratio is when the beam is wrapped in full strengthening technique.
Metrics
Article Details
This work is licensed under a Creative Commons Attribution 4.0 International License.
THIS IS AN OPEN ACCESS ARTICLE UNDER THE CC BY LICENSE http://creativecommons.org/licenses/by/4.0/
Plaudit
References
Harte, A. M., “Timber engineering: an introduction. ICE Manual of Construction Materials (Forde M (ed.)).”, Thomas Telford, London, UK 2009; 2: 707-715.
Ashraf AMR, Hiswa, Albuthbahak OM. The bending behavior of composite timber-steel beams. International Journal of Civil Engineering and Technology (IJCIET) 2018, April; 9 (4): 783–794.
Lamanna, A. J., “Flexural strengthening of reinforced concrete beams with mechanically fastened fiber reinforced polymer strips.”, University of Wisconsin—Madison 2002.
Silva, R. V., Spinelli, D., Bose Filho, W. W., Neto, S. C., Chierice, G. O., & Tarpani, J. R., “Fracture toughness of natural fibers/castor oil polyurethane composites.”, Composites science and technology 2006; 66 (10): 1328-1335.
de Andrade Silva, F., Toledo Filho, R. D., de Almeida Melo Filho, J., & Fairbairn, E. D. M. R., “Physical and mechanical properties of durable sisal fiber–cement composites.”, Construction and building materials 2010; 24 (5): 777-785.
Abdulla AI, Saleh HM, Hameed SA. Construction Materials. PERCETAKAN WING LIM SDN BHD, First Edition 2013; 61-65.
Ahmad, J., & Bhat, D. J. A., “Ductility of Timber Beams Strengthened Using CFRP Plates.”, International Journal of Civil Engineering & Technology (IJCIET) 2013; 4 (5): 42-54.
Ahmad, Y., “Ductility of timber beams strengthened using fiber reinforced polymer.”, Journal of Civil Engineering and Architecture 2013; 7 (5): 535-544.
Jasieńko, J., & Nowak, T. P., “Solid timber beams strengthened with steel plates–Experimental studies.”, Construction and Building Materials 2014; 63: 81-88.
Yang, H., Liu, W., Lu, W., Zhu, S., & Geng, Q., “Flexural behavior of FRP and steel reinforced glulam beams: Experimental and theoretical evaluation.”, Construction and building materials 2016; 106: 550-563.
Karzan, S. Habeeb, “FLEXURAL BEHAVIOUR AND CRACKING RESISTANCE OF JUTE-FIBER ROPES REINFORCED LIGHTWEIGHT THIN CEMENTITIOUS COMPOSITE”, Msc. Thesis; 2011, College of Engineering, University of Salahaddin – Hawler, Iraq.
Sen, T., & Reddy, H. J., “Strengthening of RC beams in flexure using natural jute fibre textile reinforced composite system and its comparative study with CFRP and GFRP strengthening systems.” International Journal of Sustainable Built Environment 2013; 2 (1): 41-55.
Yaseen A. Salih, et al., “Concrete Beams Strengthened with Jute Fibers”, Civil Engineering Journal 2019; 5 (4): 767-770.
ASTM D 143–94, “Standard Test Methods for Small Clear Specimens of Timber1”, ASTM Standards, USA 2000.
ASTM D 3410-87, “Standard test method for compressive properties of unidirectional or cross-ply fiber-resin composites.” West Conshohocken 1987.
ASTM D 570-98, “ Standard test method for water absorption of plastics” 2005.
ASTM, C-1018, “Standard test method for flexural toughness and first-crack strength of fiber-reinforced concrete (using beam with third-point loading).” 1997.
Abdulla AI, Khatab HR. Behavior of Multilayer Composite Ferrocement Slabs with Intermediate Rubberized Cement Mortar Layer. Arab J Sci Eng 2014; 39, 5929–5941. https://doi.org/10.1007/s13369-014-1171-y