Rehabilitation of corrosion-damaged substandard RC columns using FRP sheets

Aras Kalyoncuoglu*, Pooya Ghaffari, Caglar Goksu, Alper Ilki

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

15 Citations (Scopus)


Corrosion is one of the major problems for the existing structures and may cause significant decrease in drift capacity and strength of RC (reinforced concrete) columns due to reduction of effective cross-section of reinforcing bars, alteration of bond characteristics between reinforcing bars and concrete, and cover cracking along the reinforcing bars. Therefore, rehabilitation of corrosion-damaged columns is extremely important, particularly in seismic regions and if a substandard construction methodology is used. In this paper, an experimental work is presented on the seismic performance of rehabilitated/retrofitted substandard RC columns, which were damaged due to corrosion of reinforcing bars. For this purpose, four substandard columns were tested under high axial load and reversed cyclic lateral loads. The columns were constructed with extremely low quality concrete and plain round bars. The spacing and details of transverse reinforcing bars did not comply with the code regulations as well. Then, the specimens, except the reference one, were subjected to accelerated corrosion process. One of the corrosion-damaged specimens was tested before rehabilitation/retrofitting procedure, while the other two specimens were tested after rehabilitation/retrofitting procedure. The test results clearly demonstrated the efficiency of the applied rehabilitation/retrofitting procedure, both in terms of strength and ductility. Furthermore, analytical predictions about strength and failure modes of the specimens are compared with experimental findings.

Original languageEnglish
Title of host publicationAdvances in Civil Infrastructure Engineering
Number of pages8
Publication statusPublished - 2013
Event1st International Conference on Advances in Civil Infrastructure Engineering, ICACIE 2012 - Changsha, China
Duration: 15 Dec 201216 Dec 2012

Publication series

NameAdvanced Materials Research
ISSN (Print)1022-6680


Conference1st International Conference on Advances in Civil Infrastructure Engineering, ICACIE 2012


  • Corrosion
  • FRP
  • Plain bar
  • Reinforced concrete
  • Retrofitting
  • Seismic


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