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Modeling Bond Between Corrosion-Cracked Concrete and Composite Sheets

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Abstract

A new empirical model for the prediction of bond strength between corrosion-cracked concrete and FRP sheets is proposed in this work. The model considers the impact of concrete-cracking level as well as the geometric characteristics of FRP sheets. Experimental data (from tests on reinforced concrete blocks underwent varying corrosion levels before attached to carbon FRP (CFRP) sheets at variable bond lengths and widths) is employed in the empirical modeling. Corrosion-induced cracks at widths of about 0.2–0.9 mm lead to reductions in bond strength and slippage at failure at ranges of 25–44% and 18–68%, respectively. The developed statistical model captures the correct trend for bond stress–slip relationship and precisely predicts bond characteristics between corroding concrete and CFRP sheets in terms of key parameters. The degradation parameters (incorporated in this model) confirmed those provided by the ACI committee 440 at ranges of 0.66–0.86 for bond strength and 0.63–0.89 for slip at ultimate bond stress. The prediction accuracy of the present model of published data shows the highest when compared with that of well-known published models.

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Acknowledgements

The authors acknowledge the technical and financial support provided by the research deanship at Jordan University of Science and Technology (project number 172/2015) (Grant no. 127/2015) and the assistant by the technicians at the structural and materials laboratory at the Department of Civil Engineering.

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Authors and Affiliations

  1. Civil Engineering Department, Jordan University of Science and Technology, P.O. 3030, 22110, Irbid, Jordan

    Rami H. Haddad & Abeer Al Dalou

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  1. Rami H. Haddad
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  2. Abeer Al Dalou
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Correspondence to Rami H. Haddad.

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Haddad, R.H., Dalou, A.A. Modeling Bond Between Corrosion-Cracked Concrete and Composite Sheets. Int J Civ Eng 18, 1395–1409 (2020). https://doi.org/10.1007/s40999-020-00541-4

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  • DOI: https://doi.org/10.1007/s40999-020-00541-4

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