DOI QR코드

DOI QR Code

Load bearing capacity reduction of concrete structures due to reinforcement corrosion

  • Chen, Hua-Peng (Institute for Smart Transportation Infrastructure, East China Jiaotong University) ;
  • Nepal, Jaya (School of Architecture, Computing and Engineering, University of East London)
  • 투고 : 2020.02.11
  • 심사 : 2020.04.13
  • 발행 : 2020.08.25

초록

Reinforcement corrosion is one of the major problems in the durability of reinforced concrete structures exposed to aggressive environments. Deterioration caused by reinforcement corrosion reduces the durability and the safety margin of concrete structures, causing excessive costs in managing these structures safely. This paper aims to investigate the effects of reinforcement corrosion on the load bearing capacity deterioration of the corroded reinforced concrete structures. A new analytical method is proposed to predict the crack growth of cover concrete and evaluate the residual strength of concrete structures with corroded reinforcement failing in bond. The structural performance indicators, such as concrete crack growth and flexural strength deterioration rate, are assumed to be a stochastic process for lifetime distribution modelling of structural performance deterioration over time during the life cycle. The Weibull life evolution model is employed for analysing lifetime reliability and estimating remaining useful life of the corroded concrete structures. The results for the worked example show that the proposed approach can provide a reliable method for lifetime performance assessment of the corroded reinforced concrete structures.

키워드

과제정보

The authors are very grateful for the financial supports received from the National Natural Science Foundation of China (Grant No. 51978263) and the Natural Science Key Foundation of Jiangxi Province (Grant No. 20192ACBL20008).

참고문헌

  1. Alonso, C., Andrade, C., Rodriguez, J. and Diez, J. M. (1998), "Factors controlling cracking of concrete affected by reinforcement corrosion", Mater. Struct., 31(7), 435-441. https://doi.org/10.1007/BF02480466.
  2. Andrade, C., Molina, F. J. and Alonso, C. (1993), "Cover cracking as a function of rebar corrosion: part I - experimental test", Mater. Struct., 26(8), 453-464. https://doi.org/10.1007/BF02472805.
  3. Azad, A. K., Ahmad, S. and Al-Gohi, B. H. A. (2010), "Flexural strength of corroded reinforced concrete beams", Mag. Concrete Res., 62(6), 405-414. https://doi.org/10.1680/macr.2010.62.6.405.
  4. Barone, G. and Frangopol, D. M. (2014), "Life-cycle maintenance of deteriorating structures by multi-objective optimization involving reliability, risk, availability, hazard and cost", Struct. Safety, 48(5), 40-50. https://doi.org/10.1016/j.strusafe.2014.02.002.
  5. Bazant, Z. P. and Planas, J. (1998), Fracture and Size Effect in Concrete and Other Quasibrittle Materials, CRC Press, Florida, USA.
  6. Bhargava, K., Ghosh, A. K., Mori, Y. and Ramanujam, S. (2006), "Model for cover cracking due to rebar corrosion in RC structures", Eng. Struct., 28(8), 1093-1109. https://doi.org/10.1016/j.engstruct.2005.11.014.
  7. Chen, H. P. (2018a), "Residual flexural capacity and performance assessment of corroded reinforced concrete beams", J. Struct. Eng. ASCE, 144(12), 04018213. https://doi.org/10.1061/(ASCE)ST.1943-541X.0002144.
  8. Chen, H. P. (2018b), Structural Health Monitoring of Large Civil Engineering Structures, John Wiley and Sons Limited, Oxford, UK.
  9. Chen, H. P. and Nepal, J. (2016), "Analytical model for residual bond strength of corroded reinforcement in concrete structures", J. Eng. Mech. ASCE, 142(2), 04015079. https://doi.org/10.1061/(ASCE)EM.1943-7889.0000997.
  10. Chen, H. P. and Nepal, J. (2018), "Modelling flexural strength deterioration of concrete structures due to reinforcement corrosion", ACI Struct., 115(6), 1-12.
  11. Chen, H. P. and Xiao, N. (2015), "Symptom-based reliability analyses and performance assessment of corroded reinforced concrete structures", Struct. Mech. Eng., 53(6), 1183-1200. http://dx.doi.org/10.12989/sem.2015.53.6.1183.
  12. Chen, H. P. and Zhang, C. (2017), "Stochastic modelling fatigue crack evolution and optimum maintenance strategy for composite blades of wind turbines", Struct. Eng. Mech., 63(6), 703-712. https://doi.org/10.12989/sem.2017.63.6.703.
  13. Comite Euro-international du Beton - Federation International de la Precontrainte (CEB-FIP) (1990), Design Code, Thomas Telford, London, United Kingdom.
  14. Eurocode 2 (2004), Design of Concrete Structure, European committee for standardization, Brussels, Belgium.
  15. Giuriani, E., Plizzari, G. and Schumm, C. (1991), "Role of stirrups and residual tensile strength of cracked concrete on bond", J. Struct. Eng. ASCE, 117(1), 1-18. https://doi.org/10.1061/(ASCE)0733-9445(1991)117:1(1).
  16. Lounis, Z., Martin-Perez, B., Daigle, L. and Zhang, J. (2006), Decision Support Tools for Service Life Prediction and Rehabilitation of Concrete Bridge Decks - Final Report, Institute for Research in Construction: National Research Council Canada, Canada.
  17. Ortega, N. F., Moro J. M. and Meneses. R. S. (2018), "Theoretical model to determine bond loss in prestressed concrete with reinforcement corrosion", Struct. Eng. Mech., 65(1). https://doi.org/10.12989/sem.2018.65.1.001.
  18. Rodriguez, J., Ortega, L. M., Casal, J. and Diez, J. M. (1996), "Corrosion of reinforcement and service life of concrete structures", Durability Build. Mater. Compos., 7(1), 117-126.
  19. Soong T. T. (2004), Fundamentals of Probability and Statistics for Engineers, John Wiley and Sons, Ltd, Chichester, United Kingdom.
  20. Stewart, M. G. and Rosowsky, D. V. (1998), "Time-dependent reliability of deteriorating reinforced concrete bridge decks", Struct. Safety, 20(1), 91-109. https://doi.org/10.1016/S0167-4730(97)00021-0.
  21. Stewart, M.G. and Suo, Q. (2009), "Extent of spatially variable corrosion damage as an indicator of strength and time-dependent reliability of RC beams", Eng. Struct., 31(1), 198-207. https://doi.org/10.1016/j.engstruct.2008.08.011.
  22. Torres-Acosta, A. A. and Martinez-Madrid, M. M. (2003), "Residual life of corroding reinforced concrete structures in marine environment", J. Mater. Civil Eng. ASCE, 15(4), 344-353. https://doi.org/10.1061/(ASCE)0899-1561(2003)15:4(344).
  23. Torres-Acosta, A. A., Navarro-Gutierrez, 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.
  24. Vidal, T., Castel, A. and Francois, R. (2004), "Analyzing crack width to predict corrosion in reinforced concrete", Cement Concrete Res., 34(1), 165-174. https://doi.org/10.1016/S0008-8846(03)00246-1.
  25. Vu, K., Stewart, M. G. and Mullard, J. (2005), "Corrosion-induced cracking: Experimental data and predictive models", ACI Struct. J., 102(5), 719-726.
  26. Webster, M. P. and Clark, L. A. (2000), "Structural effect of corrosion - an overview of the mechanism", Proceedings of Concrete Communication, BCA, Camberley, Birmingham, United Kingdom.
  27. Zhang, R., Castel, A. and Francois, R. (2010), "Concrete cover cracking with reinforcement corrosion of RC beam during chloride-induced corrosion process", Cement Concrete Res., 40(3), 415-425. https://doi.org/10.1016/j.cemconres.2009.09.026.