PSI - Issue 42

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000 – 000 tr t r l I t rit r i ( ) Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ il l li t . i i t.

www.elsevier.com/locate/procedia . l i r. /l t / r i

ScienceDirect

Procedia Structural Integrity 42 (2022) 1223–1230

© 2022 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 scientific committee of the 23 European Conference on Fracture – ECF23 Abstract Reinforced Concrete (RC) structures deteriorate over years due to many reasons including corrosion of reinforcing steel, carbonation of concrete, overload on structural members, among others. This may result in flexural or shear deficiency in RC beams. The failure of shear-deficient RC beams is usually brittle, sudden and with little warning, if any. Diagonal shear cracks will form due to load increase that may result in complete fracture of the RC beam. Therefore, deteriorated and shear-deficient RC beams need to be strengthened to avoid such undesirable shear failure. This paper investigates shear strengthening of RC T-Beams using carbon fiber reinforced polymer (CFRP) laminates anchored with spike anchors. The beams have been strengthened in flexure to avoid flexural failure and then strengthened in shear using CFRP sheets that were anchored with CFRP spikes. Six beams were strengthened with CFRP laminates at 45 o and at 90 o inclination angles and anchored with embedded CFRP spikes with different depths (50 mm and 75 mm) and different diameters (10 mm and 12 mm). Wrapping (U-Wrapped) was also used for anchoring the flexural CFRP laminates. The beams are tested to failure and their capacity were compared with that of an unstrengthen control beam. It is observed that the capacity of the strengthened beams is increased up to 45% compared to that of the control beam. Anchoring with U-wraps enhanced the beam capacity further. The inclination of the CFRP sheets, dowel diameter, and the embedment depth of the spike anchors influenced shear and deformation capacity of the tested RC T-Beams. © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) i t t t t i t t i l i i i i t l, ti t , l t t l , t . i lt i l l i i i . il i i t i ll ittl , it littl i , i . i l ill t l i t t lt i l t t t . , t i t i i t t t t t i i l il . i i ti t t t i i i i l l i t it i . t t i l t i l l il t t t i i t t t it i . i t t it l i t t o t o i li ti l it i it i t t i t i t . i l i t l l l i t . t t t il t i it it t t t t t l . t i t t t it t t t i i t t t t t t l . i it t it t . i li ti t t , l i t , t t t t i i l ti it t t t . t . lished by Elsevier B. . This is an open access article unde t li tt :// ti . /li / / . / 23 European Conference on Fracture - ECF23 Shear Strengthening of Reinforced Concrete T-Beams using Carbon Fiber Reinforced Polymer (CFRP) Anchored with CFRP Spikes Jamal A. Abdalla a, *, Haya H. Mhanna b , Rami A. Hawileh a , M. Sharafi c , A. Al Marzouqi c , S. Al-Teneiji c , K. Al-Ali c a Professor, Department of Civil Engineering, American University of Sharjah, P.O. Box 26666, Sharjah, United Arab Emirates b Research Associate, Department of Civil Engineering, American University of Sharjah, P.O. Box 26666, Sharjah, United Arab Emirates c Former student, Department of Civil Engineering, American University of Sharjah, P.O. Box 26666, Sharjah, United Arab Emirates * Corresponding author, email: jabdalla@aus.edu a A , a c c i c i c a f , t t f i il i i , i i it f j , . . , j , it i t b i t , t t f i il i i , i i it f j , . . , j , it i t c t t, t t f i il i i , i i it f j , . . , j , it i t * i t , il: j ll . Peer-review under responsibility of 23 European Conference on Fracture - ECF23 Keywords: CFRP; Reinforced Concrete; Shear Strengthening; Spike Anchors; U-Wrapped. cture - E : ; i f r r t ; r tr t i ; i r ; - r . i i ilit

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23 l i r . . i i rti l r t - - li ( tt :// r ti . r /li / - - / . /) i i ilit t - t r . li

2452-3216 © 2022 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 scientific committee of the 23 European Conference on Fracture – ECF23 10.1016/j.prostr.2022.12.156