DOI QR코드

DOI QR Code

Analysis of RC beam with unbonded or exposed tensile steel reinforcements and defective stirrup anchorages for shear strength

  • Wang, Xiao-Hui (Department of Civil Engineering, Shanghai Jiaotong University) ;
  • Liu, Xi-La (Department of Civil Engineering, Shanghai Jiaotong University)
  • 투고 : 2010.08.18
  • 심사 : 2011.11.18
  • 발행 : 2012.07.25

초록

Although the effect of corrosion of reinforcing bar on the shear behavior of the reinforced concrete (RC) beam had been simulated by tests of the beam with unbonded, half-exposed or whole-exposed tensile steel reinforcements as well as defective stirrup anchorages, theoretical methods to accurately predict remaining capacity of this kind of RC beams, especially shear capacity, are still lacking. Considering the possible position of the critical inclined crack, the actual pattern of strains in the concrete body within the partial length and the proposed compatibility condition of deformations of the RC beam, shear strength of the RC beam with unbonded or exposed tensile steel reinforcements and/or defective stirrup anchorages is predicted. Comparison between the model's predictions with the experimental results published in the literature shows the practicability of the proposed model. Influence of the length of unbonded or exposed tensile steel reinforcements and the percentage of stirrups lacked end anchorages on the shear strength of the RC beam is discussed. It is concluded that, the shear strength of the RC beam with unbonded or exposed tensile steel reinforcements and/or defective stirrup anchorages is greatly influenced by the length of unbonded or exposed tensile steel reinforcements and the percentage of stirrups lacked end anchorages, this influence can be adverse, insignificant or even favourable, dependent on the given parameters of the corresponding normal bonded RC beam.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China

참고문헌

  1. Azam, R. (2010), Behaviour of shear critical RC beams with corroded longitudinal steel reinforcement, MSc thesis, Applied Science in Civil Engineering, University of Waterloo, Waterloo, Ontario, Canada.
  2. Cairns, J. (1995), "Strength in shear of concrete beams with exposed reinforcement", P. I. Civil Eng.-Struct. B., 110(2), 176-185. https://doi.org/10.1680/istbu.1995.27598
  3. Castel, A., Francois, R. and Arliguie, G. (2000), "Mechanical behaviour of corroded reinforced concrete beams Part 1: experimental study of corroded beams", Mater. Struct., 33(9), 539-544. https://doi.org/10.1007/BF02480533
  4. Choi, K.K. and Park, H.G. (2007), "Unified shear strength model for reinforced concrete beams-Part II: verification and simplified method", ACI Struct. J., 104(2), 153-161.
  5. Choi, K.K., Park, H.G. and Wight, J.K. (2007), "Unified shear strength model for reinforced concrete beams-Part I: Development", ACI Struct. J., 104(2), 142-152.
  6. Collins, M.P. and Mitchell, D. (1987), Prestressed concrete basics, Canadian Prestressed Concrete Institute (CPCI), Ottawa, Ontario, Canada.
  7. Du, Y.G., Clark, L.A. and Chan Andrew, H.C. (2007), "Impact of reinforcement corrosion on ductile behavior of reinforced concrete beams", ACI Struct. J., 104(3), 285-293.
  8. EI Maaddawy, T., Soudki, K. and Topper, T. (2005), "Long-term performance of corrosion-damaged reinforced concrete beams", ACI Struct. J., 102(5), 649-656.
  9. Higgins, C. and Farrow III, W.C. (2006), "Tests of reinforced concrete beams with corrosion-damaged stirrups", ACI Struct. J., 103(1), 133-141.
  10. Jeppsson, J. and Thelandersson, S. (2003), "Behavior of reinforced concrete beams with loss of bond at longitudinal reinforcement", J. Struct. Eng.-ASCE, 129(10), 1376-1383. https://doi.org/10.1061/(ASCE)0733-9445(2003)129:10(1376)
  11. Kani, G.N. (1964), "The riddle of shear failure and its solution", J. Am. Concrete, Inst., 61(4), 441-466.
  12. Kim, W. and White, R.N. (1999), "Shear-critical cracking in slender reinforced concrete beams", ACI Struct. J., 96(5), 757-765.
  13. Malumbela, G., Moyo, P. and Alexander, M. (2009), "Behaviour of RC beams corroded under sustained service loads", Constr. Build. Mater., 23(11), 3346-3351. https://doi.org/10.1016/j.conbuildmat.2009.06.005
  14. Park, H.G., Choi, K.K. and Wight, J.K. (2006), "Strain-based shear strength model for slender beams without web reinforcement", ACI Struct. J., 103(6), 783-793.
  15. Park, R. and Paulay, T. (1975), Reinforced concrete structures, John Wiley & Sons, New York.
  16. Regan, P.E. and Kennedy, Reid I.L. (2004), "Shear strength of RC beams with defective stirrup anchorages", Mag. Concrete Res., 56(3), 159-166. https://doi.org/10.1680/macr.2004.56.3.159
  17. Suffern, C., El-Sayed, A. and Soudki, K. (2010), "Shear strength of disturbed regions with corroded stirrups in reinforced concrete beams", Can. J. Civil Eng., 37(8), 1045-1056. https://doi.org/10.1139/L10-031
  18. Toogoenthong, K. and Maekawa, K. (2004a), "Interaction of pre-induced damages along main reinforcement and diagonal shear in RC members", J. Adv. Concrete Tech., 2(3), 431-443. https://doi.org/10.3151/jact.2.431
  19. Toogoenthong, K. and Maekawa, K. (2004b), "Shear capacity of damaged RC beam with partial longitudinal cracks in space", Proc. Jpn. Concrete Inst., 26(2), 385-390.
  20. Torres-Acosta, A.A., Fabela-Gallegos, M.J., Munoz-Noval, A., Vazquez-Vega, D., Hernandez-Jimenez, J.R. and Martinez-Madrid, M. (2004), "Influence of corrosion on the structural stiffness of reinforced concrete beams", Corrosion, 60(9), 862-872. https://doi.org/10.5006/1.3287868
  21. Tureyen, A.K. and Frosch, R.J. (2003), "Concrete shear strength: Another perspective", ACI Struct. J., 100(5), 609-615.
  22. Vidal, T., Castel, A. and Francois, R. (2007), "Corrosion process and structural performance of a 17 year old reinforced concrete beam stored in chloride environment", Cement Concrete Res., 37(11), 1551-1561. https://doi.org/10.1016/j.cemconres.2007.08.004
  23. Wang, X.H. and Liang, F.Y. (2008), "Performance of RC columns with partial length corrosion", Nucl. Eng. Des., 238(12), 3194-3202. https://doi.org/10.1016/j.nucengdes.2008.08.007
  24. Wang, X.H., Gao, X.H., Li, B. and Deng, B.R. (2011), "Effect of bond and corrosion within partial length on shear behaviour and load capacity of RC beam", Constr. Build. Mater., 25(4), 1812-1823. https://doi.org/10.1016/j.conbuildmat.2010.11.081
  25. Wang, X.H. and Liu, X.L. (2009), "Predicting the flexural capacity of RC beam with partially unbonded steel reinforcement", Comput. Concrete, 6(3), 235-252. https://doi.org/10.12989/cac.2009.6.3.235
  26. Yu, F.J. (2005), Experimental study and analysis on the diagonal shear property of corroded reinforced concrete beam, MSc thesis, College of Civil Engineering, Hohai University, P. R. China.
  27. Zhang, J.P. (1997), "Diagonal cracking and shear strength of reinforced concrete beams", Mag. Concrete Res., 49(178), 55-65. https://doi.org/10.1680/macr.1997.49.178.55

피인용 문헌

  1. Tensile behavior of new 2,200 MPa and 2,400 MPa strands according to various types of mono anchorage vol.47, pp.3, 2013, https://doi.org/10.12989/sem.2013.47.3.383
  2. Bond behaviour of straight, hooked, U-shaped and headed bars in cracked concrete vol.17, pp.5, 2016, https://doi.org/10.1002/suco.201500199