Effect of corrosion on bond mechanism between extremely low-strength concrete and plain reinforcing bars

Caglar Goksu*, Pinar Inci, Alper Ilki

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


In this study, a bond-slip model is proposed to take into account the effects of corrosion on the bond characteristics between extremely low-strength concrete and plain reinforcing bars. The proposed bond-slip model is based on reversed cyclic lateral loading tests of nearly full-scale reinforced concrete columns with reinforcing bars corroded to different levels. The columns taken into consideration during the current study were part of an extensive experimental program designed to study the performance of older columns at Istanbul Technical University. The columns were representative of a large number of underperforming reinforced concrete buildings prone to seismic actions throughout the world. Test results demonstrated that the corrosion of reinforcing bars had a significant effect on the strength and deformability characteristics of substandard reinforced concrete columns subjected to the combined actions of axial and reversed cyclic lateral loads. Taking this aspect into consideration, a novel bond-slip model is established to estimate the variation in bond strength degradation and the bond strength as a function of the level of corrosion of the reinforcing bars. Furthermore, the predictions of the proposed model are also verified with experimental results from the literature.

Original languageEnglish
Article number04015055
JournalJournal of Performance of Constructed Facilities
Issue number3
Publication statusPublished - 1 Jun 2016

Bibliographical note

Publisher Copyright:
© 2015 American Society of Civil Engineers.


The experimental study was performed at the Structural and Earthquake Engineering and Building Material Laboratories of Istanbul Technical University (ITU). The contributions of Dr. C. Demir, B. Demirtas (MSc), E. Binbir (MSc), A. Aydoǧmus (BSc), K. Darilmaz, M. Urgen, Dr. B. Yuksel, K. Orakcal, U. Demir (MSc), ITU Scientific Research Fund Department (Project No. 32794), TUBITAK (Scientific Research Project No.104I022), Telateks Textile Co., Nuh Concrete Co., and Oyak Concrete Co. are gratefully acknowledged.

FundersFunder number
ITU Scientific Research Fund Department32794
Telateks Textile Co.
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu104I022
Barcelona Supercomputing Center
Istanbul Teknik Üniversitesi


    • Bond
    • Column
    • Corrosion
    • Reinforced concrete
    • Seismic
    • Slip


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