DOI QR코드

DOI QR Code

Risk-based optimum repair planning of corroded reinforced concrete structures

  • Nepal, Jaya (School of Engineering, University of Greenwich) ;
  • Chen, Hua-Peng (School of Engineering, University of Greenwich)
  • 투고 : 2015.01.17
  • 심사 : 2015.03.07
  • 발행 : 2015.06.25

초록

Civil engineering infrastructure is aging and requires cost-effective maintenance strategies to enable infrastructure systems operate reliably and sustainably. This paper presents an approach for determining risk-cost balanced repair strategy of corrosion damaged reinforced concrete structures with consideration of uncertainty in structural resistance deterioration. On the basis of analytical models of cover concrete cracking evolution and bond strength degradation due to reinforcement corrosion, the effect of reinforcement corrosion on residual load carrying capacity of corroded reinforced concrete structures is investigated. A stochastic deterioration model based on gamma process is adopted to evaluate the probability of failure of structural bearing capacity over the lifetime. Optimal repair planning and maintenance strategies during the service life are determined by balancing the cost for maintenance and the risk of structural failure. The method proposed in this study is then demonstrated by numerical investigations for a concrete structure subjected to reinforcement corrosion. The obtained results show that the proposed method can provide a risk cost optimised repair schedule during the service life of corroded concrete structures.

키워드

참고문헌

  1. Almusallam, A., Al-Gahtani, A., Aziz, A., Dakhil, F. and Rasheeduzzafar (1996), "Effect of reinforcement corrosion on flexural behaviour of reinforced concrete slabs", J. Mater. Civil Eng.-ASCE, 8(3), 123-27. https://doi.org/10.1061/(ASCE)0899-1561(1996)8:3(123)
  2. Au, F.T.K. and Du, J.S. (2004), "Prediction of ultimate stress in unbonded prestressed tendons", Mag. Concrete Res., 56(1), 1-11. https://doi.org/10.1680/macr.2004.56.1.1
  3. Azad, A.K., Ahmad, S. and Al-Gohi, B. (2010), "Flexural strength of corroded reinforced concrete beams", Mag. Concrete Res., 62(6), 405-14. https://doi.org/10.1680/macr.2010.62.6.405
  4. Azad, A.K., Ahmad, S. and Azher, S.A. (2007), "Residual strength of corrosion-damaged reinforced concrete beams", ACI Mater. J., 104(1), 40-47.
  5. Cairns, J. and Zhao, Z. (1993), "Behaviour of concrete beams with exposed reinforcement", Proceedings of the ICE-Struct. Build., 99(2), 141-154. https://doi.org/10.1680/istbu.1993.23373
  6. Chen, H.P. and Alani, A. (2012), "Reliability and optimised maintenance for sea defences", Proceedings of the ICE: Maritime Eng., 165(2), 51-64. https://doi.org/10.1680/maen.2010.37
  7. Chen, H.P. and Alani, A. (2013), "Optimized maintenance strategy for concrete structures affected by cracking due to reinforcement corrosion", ACI Struct. J., 110(2), 229-38.
  8. Chen, H.P. and Bicanic, N. (2010), "Identification of structural damage in buildings using iterative procedure and regularisation method", Eng. Comput., 27(8), 930-950. https://doi.org/10.1108/02644401011082962
  9. Chen, H.P. and Xiao, N. (2012), "Analytical solutions for corrosion-induced cohesive concrete cracking", J. Appl. Math., Article ID 769132.
  10. Chen, H.P. and Xiao, N. (2014), "Reliability analyses and performance assessment of corroded reinforced concrete structures", Struct. Mech. Eng., 53(6), 1183-1200.
  11. Chung. L., Najm. H. and Balaguru. P. (2008), "Flexural behavior of concrete slabs with corroded bars", Cement Concrete Compos., 30(3), 184-193. https://doi.org/10.1016/j.cemconcomp.2007.08.005
  12. Comite Euro-international du Beton-Federation International de la Precontrainte (CEB-FIP), (1993), CEB-FIP Model Code 1990 Design Code, Thomas Telford, London.
  13. EC2 2004, Eurocode 2: Design of Concrete Structures-Part 1-1: General rules and rules for buildings (BS EN 1992-1-1:2004), Brussels: European committee for standardization.
  14. EI Maaddawy, T., Soudki, K. and Topper, T. (2005), "Analytical model to predict nonlinear flexural behavior of corroded reinforced concrete beams", ACI Struct. J., 102(4), 550-559.
  15. Khan, I., Francois, R. and Castel, A. (2014), "Prediction of reinforcement corrosion using corrosion induced cracks width in corroded reinforced concrete beams", Cement Concrete Res., 56, 84-96. https://doi.org/10.1016/j.cemconres.2013.11.006
  16. Liu, M. and Frangopol, D.M. (2005), "Time-dependent bridge network reliability: novel approach", J. Struct. Eng.-ASCE, 131(2), 329-337. https://doi.org/10.1061/(ASCE)0733-9445(2005)131:2(329)
  17. Mangat, P.S. and Elgarf, S. (1999), "Flexural strength of concrete beams with corroding reinforcement", ACI Struct. J., 96(1), 149-159.
  18. Nepal, J. and Chen, H.P. (2014a), "Gamma process modelling for lifecycle performance assessment of corrosion affected concrete structures", Proceedings of the World Congress on Advances in Civil, Environmental and Materials Research, Busan, Korea.
  19. Nepal, J. and Chen, H.P. (2014b), "Evaluation of residual strength of corrosion damaged reinforced concrete structures", Proceedings of the 4th International Symposium on Life-Cycle Civil Engineering, Tokyo, Japan.
  20. Pantazopoulou, S.J. and Papoulia, K.D. (2001), "Modeling cover-cracking due to reinforcement corrosion in RC structures", J. Eng. Mech.-ASCE, 127(4), 342-351. https://doi.org/10.1061/(ASCE)0733-9399(2001)127:4(342)
  21. Papakonstantinou, K.G. and Shinozuka, M. (2013), "Probabilistic model for steel corrosion in reinforced concrete structures of large dimensions considering crack effects", Eng. Struct., 57, 306-326. https://doi.org/10.1016/j.engstruct.2013.06.038
  22. Tee, K.F., Khan, L.R. and Chen, H.P. (2013), "Probabilistic failure analysis of underground flexible pipes", Struct. Eng. Mech., 47(2), 167-183. https://doi.org/10.12989/sem.2013.47.2.167
  23. Tilly, G.P. and Jacobs, J. (2007), Concrete Repairs-Performance in service and current practice, IHS BRE Press, Willoughby Road, UK.
  24. Torres-Acosta, A.A., Navarro-Gutierreza, S. and Teran-Guillen, J. (2007), "Residual flexure capacity of corroded reinforced concrete beams", Eng. Struct., 29(6), 1145-1152. https://doi.org/10.1016/j.engstruct.2006.07.018
  25. Van Noortwijk, J.M. and Frangopol, D.M. (2004), "Two probabilistic life-cycle maintenance models for deteriorating civil infrastructures", Probabilist. Eng. Mech., 19(4), 345-359. https://doi.org/10.1016/j.probengmech.2004.03.002
  26. Van Noortwijk, J.M. (2009), "A survey of the application of gamma processes in maintenance", Reliab. Eng. Syst. Safe., 94(1), 2-21. https://doi.org/10.1016/j.ress.2007.03.019
  27. Wang, X.H. and Liu, X.L. (2010), "Simplified methodology for the evaluation of residual strength of corroded reinforced concrete beams", J. Perform. Constr. Fac., 24(2), 108-119. https://doi.org/10.1061/(ASCE)CF.1943-5509.0000083
  28. Xia, J., Jin, W. and Li, L. (2012), "Effect of chloride-induced reinforcing steel corrosion on the flexural strength of reinforced concrete beams", Mag. Concrete Res., 64(6), 471-485. https://doi.org/10.1680/macr.10.00169
  29. Zhang, W., Song, X., Gu, X. and Li, S. (2012), "Tensile and fatigue behavior of corroded rebars", Constr. Build. Mater., 34, 409-417. https://doi.org/10.1016/j.conbuildmat.2012.02.071

피인용 문헌

  1. Effect of cover cracking on reliability of corroded reinforced concrete structures vol.20, pp.5, 2015, https://doi.org/10.12989/cac.2017.20.5.511
  2. Investigation of Residual Bearing Capacity of Corroded Reinforced Concrete Short Columns under Impact Load Based on Nondestructive Testing vol.2020, pp.None, 2020, https://doi.org/10.1155/2020/1901073
  3. Design charts for consolidation settlement of marine clays using finite strain consolidation theory vol.24, pp.3, 2015, https://doi.org/10.12989/gae.2021.24.3.295