Structural Engineering and Mechanics

  • 제72권4호
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  • Pages.479-489
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  • 2019
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Sensitivity analysis of flexural strength of RC beams influenced by reinforcement corrosion

  • Hosseini, Seyed A. (Faculty of Technology and Mining, Yasouj University) ;
  • Shabakhty, Naser (School of Civil Engineering, Iran university of Science and Technology) ;
  • Khankahdani, Fardin Azhdary (Department of civil engineering, Shiraz Branch, Islamic Azad University)
  • 투고 : 2017.09.17
  • 심사 : 2019.07.06
  • 발행 : 2019.11.25
⟨ 이전 논문 다음 논문 ⟩

초록

The corrosion of reinforcement leads to a gradual decay of structural strength and durability. Several models for crack occurrence prediction and crack width propagation are investigated in this paper. Analytical and experimental models were used to predict the bond strength in the period of corrosion propagation. The manner of flexural strength loss is calculated by application of these models for different scenarios. As a new approach, the variation of the concrete beam neutral axis height has been evaluated, which shows a reduction in the neutral axis height for the scenarios without loss of bond. Alternatively, an increase of the neutral axis height was observed for the scenarios including bond and concrete section loss. The statistical properties of the parameters influencing the strength have been deliberated associated with obtaining the time-dependent bending strength during corrosion propagation, using Monte Carlo (MC) random sampling method. Results showed that the ultimate strain in concrete decreases significantly as a consequence of the bond strength reduction during the corrosion process, when the section reaches to its final limit. Therefore, such sections are likely to show brittle behavior.

키워드

참고문헌

  1. ACI 318 (2011), Building code requirements for structural concrete and commentary, American Concrete Institute; Farmington Hills, MI, USA.
  2. Al-Osta, M.A., Al-Sakkaf, H.A., Sharif, A.M., Ahmad, S. and Baluch, M.H. (2018), "Finite element modeling of corroded RC beams using cohesive surface bonding approach", Comput. Concrete, 22(2), 167-182. https://doi.org/10.12989/cac.2018.22.2.167.
  3. Almusallam, A.A., Al-gahtani, A.S., Aziz, A.R. and Uzzafar, R. (1996), "Effect of reinforcement corrosion on bond strength" Construct. Build. Mater., 10 (2),123-129. https://doi.org/10.1016/0950-0618(95)00077-1.
  4. Azad, A.K., Ahmad, S. and Azher, S.A. (2007), "Residual strength of corrosion-damaged reinforcement concrete beams", ACI Mater. J., 104(1), 40-47.
  5. Bhargava, K., Ghosh, A.K., Mori, Y. and Ramanujam, S. (2007), "Corrosion-induced bond strength degradation in reinforced concrete-Analytical and empirical models", Nuclear Eng. Design, 237, 1140-1157. https://doi.org/10.1016/j.nucengdes.2007.01.010.
  6. Cabrera, J.G. (1996), "Deterioration of concrete due to reinforcement steel corrosion", Cem. Concr. Compos., 18(1), 47-59. https://doi.org/10.1016/0958-9465(95)00043-7
  7. Capozucca, R. and Cerri, M.N. (2003), "Influence of reinforcement corrosion in the compressive zone on the behavior of RC beams", Eng. Struct., 25(13), 1575-1583. https://doi.org/10.1016/S0141-0296(03)00119-6.
  8. Chung, L., Cho, S.H., Kim, J.H.J. and Yi, S.T. (2004), "Correction factor suggestion for ACI development length provisions based on flexural testing of RC slabs with various levels of corroded reinforcing bars", Eng. Struct., 26(8), 1013-1026. https://doi.org/10.1016/j.engstruct.2004.01.008.
  9. Chung, L., Kim, J.J. and Yi, S. (2008), "Bond strength prediction for reinforcement concrete with highly corroded reinforcement bars", Cement Concrete Compos., 30, 603-611. https://doi.org/10.1016/j.cemconcomp.2008.03.006.
  10. 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.
  11. Du, Y., Culle, M. and Li, C. (2013), "Structural effects of simultaneous loading and reinforcement corrosion on performance of concrete beams", Construct. Build. Mater., 39, 148-152. https://doi.org/10.1016/j.conbuildmat.2012.05.006.
  12. Duprat, F. (2007), "Reliability of RC beams under chloride-ingress", Construct. Build. Mater., 21, 1605-1616. https://doi.org/10.1016/j.conbuildmat.2006.08.002.
  13. DuraCrete (2000), "The European Union-Brite EuRam III, DuraCrete", Technical Report, Document BE95-1347/R172000.
  14. Enright, M.P and Frangopol, D.M. (1998), "Service-life prediction of deteriorating concrete structures", J. Struct. Eng., 124(3), 309-317. https://doi.org/10.1061/(ASCE)0733-9445(1998)124:3(309).
  15. Enright, M.P. and Frangopol, D.M. (1998), "Probabilistic analysis of resistance degradation of reinforced concrete bridge beams under corrosion", Eng. Struct., 20(11), 960-971. https://doi.org/10.1016/S0141-0296(97)00190-9.
  16. Fang, C., Lundgren, K., Plos, M. and Gylltoft, K. (2006), "Bond behavior of corroded reinforcing steel bars in concrete", Cem. Concr. Res., 36(10), 1931-1938. https://doi.org/10.1016/j.cemconres.2006.05.008.
  17. Gonzales, J.A., Andrade, C., Alonso, C. and Feliu, S. (1995), "Comparison of rates of general corrosion and maximum pitting penetration on concrete embedded steel reinforcement", Cem. Concr. Res., 25(2), 257-264. https://doi.org/10.1016/0008-8846(95)00006-2.
  18. Hosseini, S.A., Shabakhty, N. and Mahini, S.S. (2015), "Correlation between chloride-induced corrosion initiation and time to cover cracking in RC Structures", Struct. Eng. Mech., 56(2), 257-273. http://dx.doi.org/10.12989/sem.2015.56.2.257.
  19. Jamali, A., Angst, U., Adey, B. and Elsener, B. (2013), "Modeling of corrosion-induced concrete cover cracking: A critical analysis", Construct. Build. Mater., 42, 225-237. https://doi.org/10.1016/j.conbuildmat.2013.01.019.
  20. Kent, D.C. and Park, R. (1971), "Flexural members with confined concrete", J. Struct. Division Proc. American Soc. Civil Eng., 97(ST7), 1969-199.
  21. Khan, I., Francois, R. and Castel, A. (2014), "Prediction of reinforcement corrosion using corrosion induced cracks width in corroded reinforced concrete beams", Cem. Concr. Res., 56, 84-96. https://doi.org/10.1016/j.cemconres.2013.11.006.
  22. Lee, H.S., Noguchi, T. and Tomosawa, F. (2002), "Evaluation of the bond properties between concrete and reinforcement as a function of the degree of reinforcement corrosion", Cem. Concr. Res., 32(8), 1313-1318. https://doi.org/10.1016/S0008-8846(02)00783-4.
  23. Liu, Y. and Weyers, R.E. (1998), "Modeling the time-to-corrosion cracking in chloride contaminated reinforced concrete structures", ACI Mater. J., 95(6), 675-681.
  24. Malerba, P. G., Sgambi, L., Ielmini, D. and Gotti, G. (2017), "Influence of corrosive phenomena on bearing capacity of RC and PC beams", Adv. Concrete Construct., 5(2), 117-143. https://doi.org/10.12989/acc.2017.5.2.117.
  25. Malumbela, G., Alexander, M. and Moyo, P. (2010), "Interaction between corrosion crack width and steel loss in RC beams corroded under load", Cement Concrete Res., 40(9), 1419-1428. https://doi.org/10.1016/j.cemconres.2010.03.010.
  26. Mori, Y. and Ellingwood, B.R. (1993), "Reliability-based service-life assessment of aging concrete structures", J. Struct. Eng., 119(5), 1600-1621. https://doi.org/10.1061/(ASCE)0733-9445(1993)119:5(1600).
  27. Rodriguez, J., Ortega, L., Casal, J. and Diez, J. (1996), "Corrosion of reinforcement and service life of concrete structures", Durability Build. Mater. Components, 1(1), 117-126.
  28. Stanish, K., Hooton, R.D. and Pantazopoulou, S.J. (1999), "Corrosion effects on bond strength in reinforced concrete", ACI Struct. J., 96(6), 915-921.
  29. Vidal, T., Castel, A. and Francois, R. (2004), "Analyzing crack width to predict corrosion in reinforced concrete", Cem. Concr. Res., 34(1), 165-174. https://doi.org/10.1016/S0008-8846(03)00246-1.
  30. Vidal, T., Castel, A. and Francois, R. (2007), "Corrosion process and structural performance of a 17 years old reinforced concrete beam stored in chloride environment", Cem. Concr. Res., 37(11), 1551-1561. https://doi.org/10.1016/j.cemconres.2007.08.004.
  31. Vu, K.A.T, Stewart, M.G. and Mullard, J.A. (2005), "Corrosion-induced cracking: experimental data and predictive models", ACI Struct. J., 102(5), 719-726.
  32. Vu, K.A.T., Mullard, J.A. and Stewart, M.G. (2000), "Structural reliability of concrete bridges including improved chloride-induced corrosion models", Struct. Safety, 22(4), 313-333. https://doi.org/10.1016/S0167-4730(00)00018-7.
  33. Yalsyn, H. and Ergun, M. (1996), "The prediction of corrosion rates of reinforcing steels in concrete", Cement Concrete Res., 26(10), 1593-1599. https://doi.org/10.1016/0008-8846(96)00139-1.
  34. Zhang, R., Castel, A. and Francois, R. (2010), "Concrete cover cracking with reinforcement corrosion of RC beam during chloride-induced corrosion process", Cem. Concr. Res., 40, 415-425. https://doi.org/10.1016/j.cemconres.2009.09.026.
  35. Zhou, H., Liang, X., Wang, Z., Zhang, X. and Xing, F. (2017), "Bond deterioration of corroded steel in two different concrete mixes", Struct. Eng. Mech., 63(6), 725-734. https://doi.org/10.12989/sem.2017.63.6.725.