Structural effects of steel reinforcement corrosion on statically indeterminate reinforced concrete members
- 750 Downloads
Steel corrosion in reinforced concrete structures produces loss of reinforcement area and damage in the surrounding concrete. As a consequence, increases in deflections, crack widths and stresses may take place, as well as a reduction of the bearing capacity, which depends on the structural scheme and redundancy. In this paper an experimental study of twelve statically indeterminate beams subjected to different levels of forced reinforcement corrosion is presented. Different sustained loads were applied during the corrosion phase to assess their influence on the effects of corrosion. An important increase in deflections was registered in all corroded beams, especially in those subject to higher load levels. It was also found that the rate of corrosion was affected by the load level. Internal forces redistributions due to induced damage were measured. Finally, the experimental results were compared with those predicted by a non-linear time-dependent segmental analysis model developed by the authors, obtaining in general good agreement.
KeywordsStatically indeterminate beam Reinforced concrete Steel corrosion Redistribution
The authors wish to acknowledge the financial support of The Ministry of Economy and Competitiveness of the Government of Spain (MINECO) for providing funds for project BIA2009-11764 and the European Regional Development Funds (ERDF). The financial support of Infrastructures de Catalunya (ICAT) is also highly appreciated.
- 2.Al-Sulaimani G, Kaleemullah M, Basunbul I (1990) Influence of corrosion and cracking on bond behavior and strength of reinforced concrete members. ACI Struct J 87(2):220–231Google Scholar
- 5.Broomfield J (2002) Corrosion of steel in concrete: understanding, investigation and repair, 2nd edn. Taylor & Francis, AbingdonGoogle Scholar
- 6.Muñoz Noval A (2009) Comportamiento de vigas hiperestáticas de hormigón armado corroídas y reparadas con mortero: pérdida de propiedades mecánicas del acero de refuerzo y fisuración del recubrimiento de hormigón por corrosiónGoogle Scholar
- 19.Saifullah M, Clark LLA, Sailfullah M, Clark LLA (1994) Effect of corrosion rate on the bond strength of corroded reinforcement. In: Press SA (ed) Proceedings of the international conference corrosion and corrosion protection of steel in concrete. University of Sheffield, pp 591–600Google Scholar
- 20.ASTM Standard G1 (2011) Standard practice for preparing, cleaning, and evaluating corrosion test specimensGoogle Scholar
- 21.Cairns J, Coakley E (2015) Deformation of continuous reinforced concrete beams during patch repair. Struct Concr 11(3):149–160Google Scholar
- 23.Quagliaroli M (2014) From bidimensional towards monodimensional modeling of sound and damaged reinforced concrete structuresGoogle Scholar