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) 2342–2349

www.elsevier.com/locate/procedia

www.elsevier.com/locate/procedia

© 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 Shear failure in reinforced concrete (RC) beams is brittle and undesirable type of failure. This paper investigates the use of bore-epoxy as an anchorage technique for CFRP sheets used as externally bonded shear strengthening reinforcement. Five shear deficient RC beams were cast, one was used as a control (C), one was strengthened with two side CFRP sheets as EBR without anchorage and used as a second control or reference beam (S-EBR) and the remaining three were strengthened using two side CFRP sheets as EBR with bore-epoxy anchorage of different bore diameters (15 mm, 25 mm, 35 mm). The RC beam specimens were tested under four point bending. Load-deflection and load-strain values were recorded. The results showed that the bore-epoxy anchorage system delayed the CFRP sheets de-bonding and increased the shear capacity of the tested specimens by up to 10% compared to the S-EBR control beam and by up to 56% compared to the unstrengthen control beam. The load-deflection curves showed a considerable increase (up to 63.5%) in the deflection of the RC beams strengthened with bore-epoxy anchorage compared to the control beam resulting in a more ductile failure. The failure modes of the tested RC beams varied with the strengthening and the anchorage system used, but they were predominately delamination for the beams strengthened with externally bonded CFRP sheets on bore-epoxy anchorages. 1st Virtual European Conference on Fracture Use of Bore-Epoxy Anchorage System with CFRP Sheets for Shear Strengthening of RC Beams Jamal A. Abdalla a *, Khalid Mohamed 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, Sharj h, UAE Abstract Shear failure in reinforced concrete (RC) beams is brittle and undesirable type of failure. This paper investigates the use of bore-epoxy as an anchorage technique for CFRP sheets used as externally bonded shear strengthening reinforcement. Five shear deficient RC beams were cast, one was used as a control (C), one was strengthened with two side CFRP sheets as EBR without anchorage and used as a s cond control or reference be m (S-EBR) nd remaining three were strengthened using two side CFRP sheets as EBR with bore-epoxy a chorag of different bore diameters (15 mm, 25 mm, 35 mm). The RC beam specime s ere tested under four point b nding. Load-deflection and load-strain value were recorded. The results showed th t the b re-epoxy anchorag syst m delayed the CFRP sheets de-bonding and increased the shear capacity of the t sted specimens y up t 10% compared to the S-EBR control beam and by up to 56% compared to the unstrengthen con rol beam. The load-defl ction curves showed a considerable i crease (up to 63.5%) in the deflecti n of t e RC eams strengthened with bore- poxy anchorage compared t the control beam resulting in a more ductile failure. The failure modes of the tested RC beams varied with the strengthening and the anchor ge sys em u ed, but they were predominately delamination for the beams strengthened with externally bonded CFRP sheets on bore-epoxy anchorages. Keywords: externally-bonded reinforcement; shear strengthening; shear-deficient beams; Carbon Fiber Reinforced Polymers. 1st Virtual European Conference on Fracture Use of Bore-Epoxy Anchorage System with CFRP Sheets for Shear Strengthening of RC Beams Jamal A. Abdalla a *, Khalid Mohamed 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 reinforcement; shear strengthening; shear-deficient beams; Carbon Fiber Reinforced Polymers.

* 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.2020.11.082 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