Structural Engineering and Mechanics

  • 제56권1호
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  • Pages.123-136
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  • 2015
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Strengthening of reinforced concrete beams subjected to torsion with UHPFC composites

  • Mohammed, Thaer Jasim (School of Civil Engineering, Universiti Sains Malaysia) ;
  • Abu Bakar, B.H. (School of Civil Engineering, Universiti Sains Malaysia) ;
  • Bunnori, N. Muhamad (School of Civil Engineering, Universiti Sains Malaysia)
  • 투고 : 2015.06.29
  • 심사 : 2015.10.05
  • 발행 : 2015.10.10
⟨ 이전 논문 다음 논문 ⟩

초록

The proposed techniques to repair concrete members such as steel plates, fiber-reinforced polymers or concrete have important deficiencies in adherence and durability. The use of ultra high performance fiber concrete (UHPFC) can overtake effectively these problems. In this paper, the possibility of using UHPFC to strengthen reinforced concrete beams under torsion is investigated. Seven specimens of concrete beams reinforced with longitudinal and transverse reinforcements. One of these beams consider as control specimen while the others was strengthened by UHPFC on four, three, and two sides. This study includes experimental results of all beams with different types of configurations and thickness of UHPFC. As well as, finite element analysis was conducted in tandem with experimental test. Results reveal the effectiveness of the proposed technique at cracking and ultimate torque for different beam strengthening configurations, torque - twist graphs and crack patterns. The UHPFC can generally be used as an effective external torsional reinforcement for RC beams. It was noted that the behavior of the beams strengthen with UHPFC are better than the control beams. This increase was proportional to the retrofitted beam sides. The use of UHPFC had effect in delaying the growth of crack formation. The finite element analysis is reasonably agreement with the experimental data.

키워드

참고문헌

  1. Ameli, M., Ronagh, H.R. and Dux, P.F. (2007), "Behavior of FRP strengthened reinforced concrete beams under torsion", J. Compos Constr., 11(2), 192-200. https://doi.org/10.1061/(ASCE)1090-0268(2007)11:2(192)
  2. ANSYS Structural Analysis Guide (2005), Version 10.0, ANSYS, Inc., Canonsburg, Pennsylvania.
  3. Chalioris, C.E. (2007), "Analytical model for the torsional behaviour of reinforced concrete beams retrofitted with FRP materials", Eng. Struct. 29(12), 3263-3276. https://doi.org/10.1016/j.engstruct.2007.09.009
  4. Chalioris, C.E. (2008), "Torsional strengthening of rectangular and flanged beams using carbon fibre-reinforced-polymers-experimental study", Constr. B. Mater., 22(1), 21-29. https://doi.org/10.1016/j.conbuildmat.2006.09.003
  5. Deifalla, A. and Ghobarah, A. (2010), "Strengthening RC T-beams subjected to combined torsion and shear using FRP fabrics: experimental study", J. Compos Constr., 14(3), 301-311. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000091
  6. Deifalla, A., Awad, A. and Elgarhy, M. (2013), "Effectiveness of externally bonded CFRP strips for strengthening flanged beams under torsion: an experimental study", Eng. Struct., 56, 2065-2075. https://doi.org/10.1016/j.engstruct.2013.08.027
  7. Ghobarah, A., Ghorbel, M. and Chidiac, S. (2002), "Upgrading torsional resistance of reinforced concrete beams using fiber-reinforced polymer", J. Compos. Constr., 6(4), 257-263. https://doi.org/10.1061/(ASCE)1090-0268(2002)6:4(257)
  8. Habel, K. (2007), "Experimental investigation of composite ultra-high-performance fber-reinforced concrete and conventional concrete members", ACI Struct. J., 104(1), 93.
  9. Iskhakov, I., Ribakov, Y., Holschemacher, K. and Mueller, T. (2013), "High performance repairing of reinforced concrete structures", Mater. Des., 44, 216-222. https://doi.org/10.1016/j.matdes.2012.07.041
  10. Jariwala, V.H., Patel, P.V. and Purohit, S.P. (2013), "Strengthening of RC beams subjected to combined torsion and bending with GFRP composites", Procedia Eng., 51, 282-289. https://doi.org/10.1016/j.proeng.2013.01.038
  11. Kachlakev, D., Miller, T., Yim, S., Chansawat, K. and Potisuk, T. (2001), "Finite element modeling of reinforced concrete structures strengthened with FRP laminates", Oregon Dept. of Transp., USA, Res. Group, Final Report SPR 316.
  12. Khagehhosseini, A., Porhosseini, R., Morshed, R. and Eslami, A. (2013), "An experimental and numerical investigation on the effect of longitudinal reinforcements in torsional resistance of RC beams", Struct. Eng. Mech., 47(2), 247-263. https://doi.org/10.12989/sem.2013.47.2.247
  13. Lei, Y., Nematollahi, B., Mohamed, A., Gopal, B. and Shun, T. (2012), "Application of ultra high performance fiber reinforced concrete-the malaysia perspective", Int. J. Constr. Eng. Tech., 3(1), 26-44.
  14. Martinola, G., Meda, A., Plizzari, G.A. and Rinaldi, Z. (2010), "Strengthening and repair of RC beams with fiber reinforced concrete", Cement Concrete Compos., 32(9), 731-739. https://doi.org/10.1016/j.cemconcomp.2010.07.001
  15. Mohammed, T.J., Abu Bakar, B.H., Bunnori, N.M. and Ibraheem, O.F. (2015), "Finite element analysis of longitudinal reinforcement beams with UHPFC under torsion", Comput. Concrete, 16(1), 1-16. https://doi.org/10.12989/cac.2015.16.1.001
  16. Mohammadizadeh, M.R., Fadaee, M.J. and Ronagh, H.R. (2009), "Improving torsional behaviour of reinforced concrete beams strengthened with carbon fibre reinforced polymer composite", Iran. Poly. J., 18(4), 315-327.
  17. Noshiravani, T. and Bruhwiler, E. (2010), "Behaviour of UHPFRC-RC composite beams subjected to combined bending and shear", 8th fib PhD Symposium, fib Symposium, June.
  18. Noshiravani, T. and Bruhwiler, E. (2013), "Experimental investigation on reinforced ultra-high-performance fiber-reinforced concrete composite beams subjected to combined bending and shear", ACI Struct. J., 110(2), 251-262.
  19. Panchacharam, S. and Belarbi, A. (2002), "Torsional behaviour of reinforced concrete beams strengthened with FRP composites", 1st FIB Congress on Concrete Structures in the 21st Century, Osaka, Japan.
  20. Salom, P., Gergely, J. and Young, D. (2004), "Torsional retrofit of spandrel beams with composite laminates", J. Compos. Constr., ASCE, 8(2), 157-162. https://doi.org/10.1061/(ASCE)1090-0268(2004)8:2(157)
  21. Santhakumar, R., Dhanaraj, R. and Chandrassekaran, E. (2007), "Behaviour of retrofitted reinforced concrete beams under combined bending and torsion: a numerical study", Elect. J. Struct. Eng., 7, 1-7.
  22. Tayeh, B.A., Abu Bakar, B.H., Megat Johari, M.A. and Voo, Y.L. (2013a), "Evaluation of bond strength between normal concrete substrate and ultra high performance fiber concrete as a repair material", Procedia Eng., 54, 554-563. https://doi.org/10.1016/j.proeng.2013.03.050
  23. Tayeh, B.A., Abu Bakar, B.H., Megat Johari, M.A. and Voo, Y.L. (2013b), "Utilization of ultra-high Performance Fibre Concrete (UHPFC) for rehabilitation - a review", Procedia Eng., 54, 525-538. https://doi.org/10.1016/j.proeng.2013.03.048
  24. Zhang, J.W., Lu, Z.T. and Zhu, H. (2001), "Experimental study on the behaviour of RC torsional members externally bonded with CFRP", Proceedings of the International Conference on FRP composites in Civil Engineering, Hong Kong, China, December.

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