PSI - Issue 28

ScienceDirect Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com Procedia Structural Integrity 28 (2020) 1295–1302

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© 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo Abstract This paper explores the viability of using aluminum alloy (AA) plates as an externally bonded reinforcement (EBR) material that could overcome some of the shortcomings of the prevailing steel and FRP materials and provides new advantages. A total of 32 prisms with different concrete strengths have been prepared as single shear test specimens with AA plates bonded to the prisms at different lengths using epoxy adhesive. Single shear tests were conducted on the prism specimens until failure. Load-extension and load-strain values were recorded. Bond stress and bond slip values were calculated. Test results have shown that plain untreated AA surface is susceptible to premature debonding; however treating the AA surface, by roughening it, increases its bond strength and ultimate load capacity considerably. Generally, the ultimate load and maximum bond stress increased with the increase of the bonded length and concrete strength, on the average, for the AA roughened surface compared to the AA plain untreated surface, by up to 457%, 327%, respectively. It is also observed that the modes of failure were influenced by the changes in the bonded length, concrete strength and AA surface treatment. 1st Virtual European Conference on Fracture Bond stress and behavior of interface between untreated aluminum alloy surface and concrete Jamal A. Abdalla a *, Ahmed Mirghani b , Rami A. Hawileh a a Professor of Civil Engineering, American University of Sharjah, Sharjah, UAE b Formerly Graduate Student, Department of Civil Engineering, American University of Sharjah, Sharjah, UAE Abstract This paper explores the viability of using aluminum alloy (AA) plates as an externally bonded reinforcement (EBR) mate ial that could overcome some of the shortcomings of the prevailing steel and FRP materials and provides new advantages. A total of 32 prisms with different concrete strengths have been prepared as single shear test specimens with AA plates bonded to the prisms at different lengths using e oxy adhesive. Si g e shear tests were conducted on the p sm spe imens until failure. L ad- xtension a d l ad-strain a ues w re recorded. Bond stress and bond slip values w re calculated. Test results have shown that plain untreated AA surface is susceptible to prem ture debonding; however tre ting the AA surface, by roughening it, i creases its bond strength and ultimate load capacity siderably. G ne ally, th ultimate load and maximum bond stress increased with the inc as f the bonded length and concrete strength, on the average, for the AA roug ened surface compare to the AA plain untreated surface, by up to 457%, 327%, respectively. It is also observed that the modes of failure were influenced by the changes in the bonde length, co crete strength and AA surface treatment. Keywords: Externally-bonded material , aluminum alloy, carbon fiber reinforced polymers, bond stress-slip, interfacial surface treatment. 1. Introduction and Background Over the last three decades, extensive research work has been conducted to evaluate the performance of externally bonded reinforcement (EBR) in order to validate their use in strengthening and retrofitting of reinforced concrete (RC) members. Steel plates and fiber reinforced polymers (FRP) laminates were used predominantly as EBR (Hamoush 1st Virtual European Conference on Fracture Bond stress and behavior of interface between untreated aluminum alloy surface and concrete Jamal A. Abdalla a *, Ahmed Mirghani b , Rami A. Hawileh a a Professor of Civil Engineering, American University of Sharjah, Sharjah, UAE b Formerly Graduate Student, Department of Civil Engineering, American University of Sharjah, Sharjah, UAE Keywords: Externally-bonded material , aluminum alloy, carbon fiber reinforced polymers, bond stress-slip, interfacial surface treatment. 1. Introduction and Background Over the last three decades, extensive research work has been conducted to evaluate the performance of externally bonded reinforcement (EBR) in order to validate their use in strengthening and retrofitting of reinforced concrete (RC) members. Steel plates and fiber reinforced polymers (FRP) laminates were used predominantly as EBR (Hamoush

* Corresponding author. Tel.: +0-000-000-0000 ; fax: +0-000-000-0000 . E-mail address: jabdalla@aus.edu

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo 10.1016/j.prostr.2020.11.111 2452-3216 © 2020 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo 2452-3216 © 2020 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo * Corresponding author. Tel.: +0-000-000-0000 ; fax: +0-000-000-0000 . E-mail address: jabdalla@aus.edu