PSI - Issue 68

Aseel Salameh et al. / Procedia Structural Integrity 68 (2025) 166–172 A. Salameh et al. / Structural Integrity Procedia 00 (2025) 000–000

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the load at which the failure occurred was 15.70 kN, only 3.8% more than the experimental ultimate load value of 15.13 kN. This indicates that the model is able to capture the debonding phenomena and accurately predict the response of FRP-strengthened concrete beams.

Debonding

(a)

(b)

Fig. 5. Failure modes: (a) FE model; (b) experimental.

4. Summary and conclusion This research has successfully adapted and used experimentally derived bond-slip models within the finite element modeling of CFRP-strengthened concrete prisms. The paper clearly shows that cohesive zone modeling can reflect realistically the complex interfacial behavior between CFRP and concrete substrates. Finally, based on the results, the following conclusions can be reached: • Based on the experimental bond-slip data, the enhanced finite element model should be able to capture the ultimate load and failure mode of CFRP-strengthened concrete prisms. • The very good agreement between experimental and numerical results confirms the effectiveness of the proposed approach in modeling CFRP-concrete interfaces. • The integrated approach fills the gap between experimental observation and computational modeling; thus, it is a more effective methodology in predicting the performance of CFRP-strengthened concrete structures. • Further studies can be conducted on extending this methodology to different conditions of loading, geometries, and FRP materials. Acknowledgements The support presented in this paper had been provided by the American University of Sharjah and Riad T. Al Sadek Endowed Chair in Civil Engineering. The support is gratefully acknowledged and appreciated. References 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), 82–99. https://doi.org/10.1080/01694243.2016.1204741 ANSYS, 2019 – Release Version 19.2, 0000. A Finite Element Computer Software and User Manual for Nonlinear Structural Analysis, ANSYS 2019, Inc. Canonsburg, PA. (2019). Assad, M., Hawileh, R. A., Abdalla, J. A., 2022. Modeling the behavior of CFRP-strengthened RC slabs under fire exposure. Procedia Structural Integrity 42, 1668–1675. https://doi.org/10.1016/j.prostr.2022.12.210 Assad, M., Hawileh, R., Abdalla, J., 2022. Finite Element Simulation of FRP-Strengthened Thin RC Slabs. Journal of Composites Science 6(9), 263. https://doi.org/10.3390/jcs6090263 Assad, M., Mhanna, H., Hawileh, R. H., Abdalla, J. A., 2024. Finite element modeling of strengthened T-beams with CFRP U-wraps. AIP