PSI - Issue 28

Jamal A. Abdalla et al. / Procedia Structural Integrity 28 (2020) 1295–1302 Author name / Structural Integrity Procedia 00 (2019) 000–000

1301

7

 In Case of AA-P the concrete strength appears to have little effect on the bond stress, because the failure in this case takes place in the plate adhesive interface due to the weak bond between these two surfaces. Whereas for AA-R the bond stress increases with the increase in concrete strength.  In case of both AA-P and AA-R, the ultimate load increases with the increase in the bonded length up to a certain length called the effective bond length. The effective bond length (EBL) of the tested samples differs depending on the type and surface roughness of the AA plates.  The ultimate load capacity and maximum bond stress, based on average values, increased by 457%, and 327%, respectively for AA-R surface compared with those of AA-P.  The AA-R plates resulted in a considerably higher failure load, and maximum bond stress compared with the AA plates with untreated surface using average bond length and compressive strength results.  Failure modes vary with the surface roughness, concrete strength and bonded length. Failure of AA-P took place in the plate-adhesive interface (debonding) whereas failure modes of AA-R took place at adhesive concrete interface (delamination).  AA-R plates have good attributes that make them a viable strengthening material in practical applications. Acknowledgements The research presented in this paper has been sponsored by the American University of Sharjah. Their support is gratefully acknowledged. The authors would like to also acknowledge the help of Eng. Arshi Faridi for his help in testing operations. His help is highly appreciated. The views and conclusions, expressed or implied, in this document are those of the authors and should not be interpreted as those of the sponsor. References Aalco, Aluminium Alloy - Commercial Alloy - 5083 - ‘0’ - H111 Sheet and Plate, Parkway House, Unit 6 Parkway Industrial Estate, Wednesbury WS10 7WP, 2019. Abdalla, J., Abu-Obeidah, A., Hawileh, R., 2011. Behaviour 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. Abdalla, J. A., Abu-Obeidah, A. S., Hawileh, R. A., Rasheed, H. A., hayder., 2016. Shear strengthening of reinforced concrete beams using externally-bonded aluminum alloy plates: An experimental study'. Abdalla, J. A., Hawileh, R. A., Nawaz, W., Mohammed, A., 2018. Reinforced concrete beams externally strengthened in flexure using hybrid systems. IEEE, 1-5. Abdalla, J. A., Hraib, F. H., Hawileh, R. A., Mirghani, A. M., 2017. Experimental investigation of bond-slip behavior of aluminum plates adhesively bonded to concrete', Journal of Adhesion Science and Technology, 31(1), pp. 82-99. Abu-Obeidah, A., Hawileh, R. A., Abdalla, J. A., 2015. Finite element analysis of strengthened RC beams in shear with aluminum plates, Computers & Structures, 147, pp. 36-46. Abuodeh, O. R., Abdalla, J. A., Hawileh, R. A., 2019. The flexural behavior of bolting and bonding Aluminum Alloy plates to RC beams, Procedia Structural Integrity, 17, pp. 395-402. Al Nuaimi, N., Sohail, M. G., Hawileh, R. A., Abdalla, J. A., Douier, K., 2020. Durability of Reinforced Concrete Beams Strengthened by Galvanized Steel Mesh-Epoxy Systems under Harsh Environmental Conditions, Composite Structures, pp. 112547. Al-Tamimi, A. K., Hawileh, R., Abdalla, J., Rasheed, H. A., 2011. Effects of ratio of CFRP plate length to shear span and end anchorage on flexural behavior of SCC RC beams, Journal of Composites for Construction, 15(6), pp. 908-919. Alhassan, M. A., Al-Rousan, R. Z., Taha, H. M., 2020. Precise finite element modelling of the bond-slip contact behavior between CFRP composites and concrete, Construction and Building Materials, 240. Aprile, A., Spacone, E., Limkatanyu, S., 2001. Role of Bond in RC Beams Strengthened with Steel and FRP Plates, Journal of Structural Engineering, 127(12), pp. 1445-1452. Augusthus Nelson, L., Al-Allaf, M., Weekes, L., 2020. Analytical modelling of bond-slip failure between epoxy bonded FRP and concrete substrate, Composite Structures, 251. Biscaia, H. C., Chastre, C., Silva, M. A. G., 2013. Linear and nonlinear analysis of bond-slip models for interfaces between FRP composites and concrete, Composites Part B, 45(1), pp. 1554-1568. Cao, S., Chen, J., Pan, J., Sun, N., 2007. ESPI measurement of bond-slip relationships of FRP-concrete interface, Journal of Composites for Construction, 11(2), pp. 149-160. Chaallal, O., Nollet, M., Perraton, D., 2016. Shear Strengthening of RC Beams by Externally Bonded Side CFRP Strips. Journal of Composites for Construction, vol. 2, no. 2, pp. 111-113, Sept. 2016. Chen, J. F., Pan, W. K., 2006. Three dimensional stress distribution in FRP-to-concrete bond test specimens, Construction and Building Materials, 20(1–2), pp. 46-58. Chen, J. F., Teng, J. G., 2001. Anchorage Strength Models for FRP and Steel Plates Bonded to Concrete, Journal of structural engineering.