PSI - Issue 37

Jamal A. Abdalla et al. / Procedia Structural Integrity 37 (2022) 652–659 Abdalla et al./ Structural Integrity Procedia 00 (2019) 000 – 000

658

7

Table 7 Summary of ultimate loads and failure modes Specimen P u (kN) Mode of Failure CB 58.78

Flexural failure (Steel yielding, concrete crushing)

B1W0 B2W1 B3W2

69.67 70.13 82.49

Cover delamination

Plate debonding

Debonding of Wraps followed by plate debonding and failed in flexure mode

5. Conclusions This study introduced the use of Aluminum Alloy plates as a potential material for externally strengthening reinforced concrete beams under flexure. The following observations and conclusions could be drawn from the experimental outcomes of this study: • The use of AA plates with and without end anchorages provided, in general, more strength and ductility compared to that of the control beam. • The increase in flexural capacity of the AA strengthened beams varied between 18.5%-40.3% to that of the control beam. • The increase in ultimate ductility of the AA strengthened beams ranged between 0.95-1.33 times that of the control beam. • The increase in failure ductility of the AA strengthened beams ranged between 1.08-1.55 times that of the control beam. • The use of CFRP U-wraps, as end anchorages, increased the strength with a slight decrease in ductility compared to the strengthened beam without U-wraps. • More studies are warranted to validate the findings of this study. 6. References Aalco, “Aluminium Alloy - Commercial Alloy - 5083 - ‘0’ - H111 Sheet and Plate,” Parkway House, Unit 6 Parkway Industrial Estate, Wedne sbury WS10 7WP, 2019. Abdalla, J. A., Hawileh, R. A., Nawaz, W., & Mohammed, A. 2018. Reinforced concrete beams externally strengthened in flexure using hybrid systems. In 2018 Advances in Science and Engineering Technology International Conferences (ASET) (pp. 1-5). IEEE. Abdalla, J. A., Abu-Obeidah, A. S., Hawileh, R. A., & Rasheed, H. A. 2016. Shear strengthening of reinforced concrete beams using externally bonded aluminum alloy plates: An experimental study. Construction and Building Materials, 128, 24-37. Abdalla, J. A., Abu-Obeidah, A. and Hawileh, R. A. 2011. Behavior of Shear Deficient Reinforced Concrete Beams with Externally Bonded Aluminum Alloy Plates. The 2011 World Congress on Advances in Structural Engineering and Mechanics (ASEM\'11+ Congress, Seoul, South Korea, September 18- 23. Abdalla, J. A., Abu-Obeidah, A. R. and Hawileh, R. A. 2019. Use of Aluminum Alloy Plates as Externally Bonded Shear Reinforcement for R/C Beams. Procedia Structural Integrity 17, 403-410. Abu-Obeidah, A. S., Abdalla, J. A., & Hawileh, R. A. 2019. Shear strengthening of deficient concrete beams with marine grade aluminium alloy plates. Advances in concrete construction, 7(4), 249-262. Abuodeh, O. R., Abdalla, J. A. and Hawileh, R. A. 2021. Flexural strengthening of RC beams using aluminum alloy plates with mechanically fastened anchorage systems: An experimental investigation. Engineering Structures 234, 111969. Abuodeh O. R., Abdalla J. A., and Hawileh R. A. 2019. The flexural behavior of bolting and bonding AluminumAlloy plates to RC beams. Procedia Structural Integrity;17:395 – 402. Akbarzadeh, H., Maghsoudi, A., 2010. Experimental and analytical investigation of reinforced high strength concrete continuous beams strengthened with fiber reinforced polymer, Materials. Design, 31(3), 1130-1147. Ashour, A.F., El-Refaie, S.A., Garrity, S.W., 2004. Flexural strengthening of RC continuous beams using CFRP laminates, Cem. Concr. Compos., 26(7), 765 – 775. Nanni, A. 2003. North American design guidelines for concrete reinforcement and strengthening using FRP: principles, applications and unresolved