Structural Engineering and Mechanics

  • 제47권2호
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  • Pages.247-263
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  • 2013
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

An experimental and numerical investigation on the effect of longitudinal reinforcements in torsional resistance of RC beams

  • Khagehhosseini, A.H. (School of Civil Engineering, Yazd University) ;
  • Porhosseini, R. (School of Civil Engineering, Yazd University) ;
  • Morshed, R. (School of Civil Engineering, Yazd University) ;
  • Eslami, A. (School of Civil Engineering, The University of Queensland)
  • 투고 : 2012.08.28
  • 심사 : 2013.07.17
  • 발행 : 2013.07.25
⟨ 이전 논문 다음 논문 ⟩

초록

It is evident that torsional resistance of a reinforced concrete (RC) member is attributed to both concrete and steel reinforcement. However, recent structural design codes neglect the contribution of concrete because of cracking. This paper reports on the results of an experimental and numerical investigation into the torsional capacity of concrete beams reinforced only by longitudinal rebars without transverse reinforcement. The experimental investigation involves six specimens tested under pure torsion. Each specimen was made using a cast-in-place concrete with different amounts of longitudinal reinforcements. To create the torsional moment, an eccentric load was applied at the end of the beam whereas the other end was fixed against twist, vertical, and transverse displacement. The experimental results were also compared with the results obtained from the nonlinear finite element analysis performed in ANSYS. The outcomes showed a good agreement between experimental and numerical investigation, indicating the capability of numerical analysis in predicting the torsional capacity of RC beams. Both experimental and numerical results showed a considerable torsional post-cracking resistance in high twist angle in test specimen. This post-cracking resistance is neglected in torsional design of RC members. This strength could be considered in the design of RC members subjected to torsion forces, leading to a more economical and precise design.

키워드

참고문헌

  1. ACI Committee 318 (1989), Building Code Requirements For Structural Concrete (ACI 318-89) And Commentary (ACI 318R-89), American Concrete Institute, Farmington Hills, Mich. .
  2. ACI Committee 318 (1999), Building Code Requirements For Structural Concrete (ACI 318-99) And Commentary (ACI 318R-99) , American Concrete Institute, Farmington Hills, Mich. .
  3. Ameli, M. (2005), "Torsional strengthening of RC beam with FRP composites", PhD Thesis, Department of Civil Engineering, The University of Queensland, Australia.
  4. Ameli, M., Ronagh, H.R., and Dux, P.F. (2007), "Behavior of FRP strengthened reinforced concrete beams under torsion", Journal of Composites for Construction, 11(2), 192-200. https://doi.org/10.1061/(ASCE)1090-0268(2007)11:2(192)
  5. Andersen, P. (1937), "Rectangular concrete sections under torsion", American Concrete Institute, 9(1), 1-11.
  6. ANSYS Manual (2005), ANSYS, Inc., version 9 Canonsburg, PA 15317, USA.
  7. Arockiasamy, M. (1964), "Torsional strength (elastic and plastic) of reinforced concrete members", Indian Concrete Journal, 38(11), 433-440.
  8. Aryal, M.P. (2005), "Longitudinal reinforcement in concrete beams in torsion" Proceeding of the 2005 International Congress - Global Construction: Ultimate Concrete Opportunities, Thomas Telford Services Ltd., July.
  9. ASTM A615M (2009), "Standard specification for deformed and plain carbon-steel bars for concrete reinforcement", American Society for Testing and Materials, Philadelphia, PA.
  10. Bach, C. (1912), "Torsion experiments on bodies of rectangular cross-section", Zeitschrift des Vereines Deutscher Ingenieure, 56, 440-441.
  11. Bishara, A., and Peir, J. (1968), "Reinforced concrete rectangular columns in torsion", Journal of the Structural Division.
  12. Cevik, A., Arslan, M.H. and Saracoglu, R. (2012), "Neuro-fuzzy modeling of torsional strength of RC beams", Computers and Concrete, An International Journal, 9(6), 469-486. https://doi.org/10.12989/cac.2012.9.6.469
  13. Chakraborty, M. (1979), "Ultimate torque of reinforced rectangular beams", Journal of the Structural Division, 105(3), 653-668.
  14. Chiu, H.J., Fang, I., Young, W.T. and Shiau, J.K. (2007), "Behavior of reinforced concrete beams with minimum torsional reinforcement", Engineering Structures, 29(9), 2193-2205. https://doi.org/10.1016/j.engstruct.2006.11.004
  15. Dalalbashi, A., Eslami, A. and Ronagh, H. (2013), "Numerical investigation on the hysteretic behavior of RC joints retrofitted with different CFRP configurations.", Journal of Composites for Construction, 17(3), 371-382. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000361
  16. Dalalbashi, A., Eslami, A. and Ronagh, H.R. (2012). "Plastic hinge relocation in RC joints as an alternative method of retrofitting using FRP", Composite Structures, 94(8), 2433-2439. https://doi.org/10.1016/j.compstruct.2012.02.016
  17. Elfren, L., Karlsson, I. and Losberg, A. (1974), "Torsion-bending-shear interaction for concrete beams", Journal of the Structural Division, 100(8), 1657-1676.
  18. Ernst, G.C. (1957), "Ultimate torsional properties of rectangular reinforced concrete beams", American Concrete Institute, 29(4), 341-356.
  19. Ersoy, U. and Ferguson, P.M. (1967), "Behavior and strength of concrete L-beams under combined torsion and shear", Proc., ACI Journal Proceedings, ACI.
  20. Eslami, A., Dalalbashi, A. and Ronagh, H.R. (2013), "On the effect of plastic hinge relocation in RC buildings using CFRP", Composites Part B: Engineering, 52(0), 350-361. https://doi.org/10.1016/j.compositesb.2013.04.025
  21. Gesund, H. and Boston, L.A. (1964), "Ultimate strength in combined bending and torsion of concrete beams containing only longitudinal reinforcement", American Concrete Institute Journal, 61(11), 1453-1471.
  22. Hognestad, E., Hanson, N.W. and McHenry, D. (1955), "Concrete stress distribution in ultimate strength design", ACI Journal Proceedings, 52(12), 455-480.
  23. Hsu, T.T.C. (1968), "Torsion of structural concrete-plain concrete recatngular sections", ACI Structural Journal, 18, 203-238.
  24. Hsu, T.T.C. (1968), "Torsion of structural concrete - Interaction surface for combined torsion, shear, and bending in beams without stirrups", American Concrete Institute, 65(1), 51-60.
  25. Kachlakev, D., Miller, T., Yim, S., Chansawat, K. and Potisuk, T. (2001), "Finite element modeling of reinforced concrete structures strengthened with FRP laminates", SPR 316, Oregon Department of Transportation Research Group and Federal Highway Administration.
  26. Karayannis, C.G. (2000), "Smeared crack analysis for plain concrete in torsion", Journal of Structural Engineering, 126(6), 638-645. https://doi.org/10.1061/(ASCE)0733-9445(2000)126:6(638)
  27. Klus, J.P. (1968), "Ultimate strength of reinforced concrete beams in combined torsion and shear", ACI Journal Proceedings, 65(3), 210-216.
  28. Lisantono, A. (2013), "Nonlinear finite element analysis of torsional R/C hybrid deep T beam with opening", Computers and Concrete, 11(5), 399-410. https://doi.org/10.12989/cac.2013.11.5.399
  29. Mahmood, M.N. (2007), "Nonlinear analysis of reinforced concrete beams under pure torsion", Journal of Applied Sciences, 7(22), 3524-3529. https://doi.org/10.3923/jas.2007.3524.3529
  30. Martin, L.H. (1973), "Torsion and bending in longitudinally reinforced concrete beams", Building Science, 8(4), 339-350. https://doi.org/10.1016/0007-3628(73)90019-4
  31. May, I.M. and Al-Shaarbaf, I.A.S. (1989), "Elasto-plastic analysis of torsion using a three-dimensional finite element model", Computers & Structures, 33(3), 667-678. https://doi.org/10.1016/0045-7949(89)90241-1
  32. Mizra, M.S. and McCutcheon, J.O. (1968), "Response of concrete beams with longitudinal reinforcing to combined bending and torsion", Engineering Journal, 51(4).
  33. Mostofinejad, D. and Talaeitaba, S.B. (2011), "Nonlinear modeling of RC beams subjected to torsion using the smeared crack model", Procedia Engineering, 14(0), 1447-1454. https://doi.org/10.1016/j.proeng.2011.07.182
  34. Nyland, H. (1945), "Torsional and torsion restraint by concrete structures", Stations Committee for Byggnadsforsking, Bulletin No. 3.
  35. Park, R. (1989), "Evaluation of ductility of structures and structural assemblages from laboratory testing", Bulletin of the New Zealand National Society for Earthquake Engineering, 22(3), 155-166.
  36. Park, R. and Paulay, T. (1975), Reinforced Concrete Structures, Wiley, New York.
  37. Rahal, K.N. (2000), "Torsional strength of reinforced concrete beams", Canadian Journal of Civil Engineering, 27(3), 445-453. https://doi.org/10.1139/l99-083
  38. Rahal, K.N. and Collins, M.P. (1995), "Effect of thickness of concrete cover on shear-torsion interaction - an experimental investigation", ACI Structural Journal, 92(3), 334-342.
  39. Rahal, K.N. and Collins, M.P. (2003), "Experimental evaluation of ACI and AASHTO-LRFD design provisions for combined shear and torsion", ACI Structural Journal, 100(3), 277-282.
  40. Ramakrishnan, V. and Vijayarangan, B. (1963), "The influence of combined bending and torsion on rectangular beams without web reinforcement", Indian Concrete Journal, 412-416.
  41. Rashid, Y.R. (1968), "Ultimate strength analysis of prestressed concrete pressure vessels", Nuclear Engineering and Design, 7(4), 334-344. https://doi.org/10.1016/0029-5493(68)90066-6
  42. Victor, D.J. and Ferguson, P.M. (1968), "Reinforced concrete T-beams without stirrups under combined moment and torsion", Proc., ACI Journal Proceedings, ACI.
  43. Victor, D.J. and Muthukrishnan, R. (1973), "Effect of stirrups on ultimate torque of reinforced concrete beams." ACI Journal Proceedings, 70(4), 300-306.
  44. Willam, K.J. and Warnke, E.D. (1975), "Constitutive model for the triaxial behaviour of concrete." Proceedings of International Association for Bridge and Structural EngineeringBergamo, Italy, 174.
  45. Yoon, K., Lee, Y. and Lee, P.S. (2012), "A continuum mechanics based 3-D beam finite element with warping displacements and its modeling capabilities", Structural Engineering and Mechanics, 43(4), 411-437. https://doi.org/10.12989/sem.2012.43.4.411
  46. Young, C.R. (1923), "Torsional strength of rectangular sections of concrete, plain and reinforced", American Architect and the Architectural Review, 124(2425), 121-126.

피인용 문헌

  1. Strengthening of reinforced concrete beams subjected to torsion with UHPFC composites vol.56, pp.1, 2015, https://doi.org/10.12989/sem.2015.56.1.123
  2. Finite element analysis of longitudinal reinforcement beams with UHPFC under torsion vol.16, pp.1, 2015, https://doi.org/10.12989/cac.2015.16.1.001
  3. Effective torsional strength of axially restricted RC beams vol.67, pp.5, 2013, https://doi.org/10.12989/sem.2018.67.5.465