Main Article Content

Reem Thaker Mahmoud Abdulla
Aziz I. Abdulla
Ammar S. Khazaal


Abstract

The study involves strengthening timber beams by known jute fibers with various forms of strengthening and comparison the bending test results with the control beams and beams strengthened by steel plates. Twenty-two timber specimens with dimensions (70×100×1000) mm are divided into eight groups and loaded under a one-point load. The work is carried out to study the flexural and shear strengthening effects on behavior of the tested beams. Four specimens wrapped in U technique in single and double layers, along the whole length of the beam in full and strips wrapping technique, seven beams bonded in full and spiral configuration, seven timber specimens wrapped in flexural strengthening technique with single and multiple layers, and two samples strengthened by steel plates. The results show that jute fibers strengthening are improved the ultimate loads of timber beams by between (30%-101%) compared with the control beams for different types of strengthening and by about (80%, 85%) using steel plates strengthening. On the other hand, the mid-span deflection are decreased by between (28%-45%) at the same load. Furthermore, it is found that the highest ultimate load deflection is when the beam wrapped in full strengthening technique. The ductility, stiffness, toughness at yield load and toughness at ultimate load are increased by between (21%-51%), (10%- 73%), (45%-373%), and (57%-401%), respectively. The jute fibers strengthening have high elasticity performance and prove that the jute fibers materials have a large potential to act as a structural strengthening material.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...

Article Details

How to Cite
1.
Abdulla RTM, Abdulla AI, Khazaal AS. Behavior of Timber Beams Strengthened by Jute Fibers . jaset [Internet]. 2021 Dec. 25 [cited 2022 Dec. 1];3(1):1-20. Available from: https://isnra.net/ojs/index.php/jaset/article/view/30

References

Harte, A. M., “Timber engineering: an introduction. ICE Manual of Construction Materials (Forde M (ed.)).”, Thomas Telford, London, UK, 2009, Vol. 2, pp.707-715.

Ashraf A. M. R. Hiswa & Oday M. Albuthbahak, “The bending behavior of

composite timber-steel beams.”, International Journal of Civil Engineering and Technology (IJCIET), 2018, April, Volume 9, Issue 4, pp.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, Vol. 66, No. 10, pp.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, Vol. 24, No. 5, pp.777-785.

Aziz I. Abdulla, Haifa Mahdi Saleh and Sarab Assim Hameed, “Construction Materials”, PERCETAKAN WING LIM SDN BHD, First Edition, 2013, pp.61-65.

Ahmad, J., & Bhat, D. J. A. (2013), “Ductility of Timber Beams Strengthened Using CFRP Plates.”, International Journal of Civil Engineering & Technology (IJCIET), Vol. 4 No. 5, pp.42-54.

Ahmad, Y., “Ductility of timber beams strengthened using fiber reinforced polymer.”, Journal of Civil Engineering and Architecture, 2013, Vol. 7, No. 5, pp. 535-544.

Jasieńko, J., & Nowak, T. P., “Solid timber beams strengthened with steel plates–Experimental studies.”, Construction and Building Materials, 2014, Vol. 63, pp.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, Vol. 106, pp.550-563.

Karzan, S. Habeeb, “FLEXURAL BEHAVIOUR AND CRACKING RESISTANCE OF JUTE-FIBER ROPES REINFORCED LIGHTWEIGHT THIN CEMENTITIOUS COMPOSITE”, Msc. Thesis, College of Engineering, University of Salahaddin – Hawler, Iraq, 2011, pp.25-28

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, Vol. 2, No. 1, pp.41-55.

Alam, M. A., Nouri, K., Jumaat, M. Z., & Muda, Z. C., “Flexural strengthening of reinforced concrete beam using jute rope composite plate.” In The Third National Graduate Conference, 2015, April, Vol. 8, No. 9.

Yaseen A. Salih, et al., “Concrete Beams Strengthened with Jute Fibers”, Civil Engineering Journal, 2019, April, Vol. 5, No. 4, pp.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.