PSI - Issue 42

Maha Assad et al. / Procedia Structural Integrity 42 (2022) 1668–1675 Assad et al./ Structural Integrity Procedia 00 (2019) 000 – 000

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concluded that Finite element (FE) simulation is a powerful tool for the investigation of RC structural members, strengthened RC members, and their behavior under ambient and elevated temperatures. The FE analysis can be used in place of the expensive experimental tests to conduct a limitless number of investigations. Results from the proposed numerical model can be utilized to test various parameters, namely, different fire protection systems, reinforcement configuration, and fire exposure scenarios. The following observations and conclusions could be drawn from the results of this study: • The developed FE model predicted to a good extent the behavior of the slab specimens from initial loading until failure under the combined effects of static loading and fire exposure, with a maximum percentage difference of 15% in the ultimate load; • Both strengthened slabs experienced failure in the interfacial bond between the CFRP strip and concrete. However; • The NSM strengthening system showed better performance than the EBR technique under ambient temperature and fire exposure in terms of higher flexural capacity and ductility. The slab strengthened using the NSM method exhibited considerably more fire resistance; Abdalla, J. A., Mohammed, A., & Hawileh, R. A. (2020). Flexural strengthening of reinforced concrete beams with externally bonded hybrid systems. Procedia Structural Integrity, 28, 2312 – 2319. doi: 10.1016/j.prostr.2020.11.078 Ahmed, A., & Kodur, V. (2011). The experimental behavior of FRP-strengthened RC beams subjected to design fire exposure. Engineering Structures, 33(7), 2201 – 2211. doi: 10.1016/j.engstruct.2011.03.010 ANSYS – Release Version 19.2, 2019. A Finite Element Computer Software and User Manual for Nonlinear Structural Analysis, ANSYS 2019, Inc. Canonsburg, PA. Assad, M., Hawileh, R. A., Abdalla, J. A., & Abed, F. (2022). Heat Transfer Analysis of Reinforced Concrete Walls in ANSYS and ABAQUS: A Comparative Study. 2022 Advances in Science and Engineering Technology International Conferences, ASET 2022. doi: 10.1109/ASET53988.2022.9735001 Azevedo, A. S., Firmo, J. P., Correia, J. R., Chastre, C., Biscaia, H., & Franco, N. (2022). Fire behaviour of CFRP-strengthened RC slabs using different techniques – EBR, NSM and CREatE. Composites Part B: Engineering, 230. doi: 10.1016/j.compositesb.2021.109471 Bhatt, P. P., Kodur, V. K. R., Shakya, A. M., & Alkhrdaji, T. (2021). Performance of insulated FRP-strengthened concrete flexural members under fire conditions. Frontiers of Structural and Civil Engineering, 15(1), 177 – 193. doi: 10.1007/s11709-021-0714-z Carlos, T. B., Rodrigues, J. P. C., de Lima, R. C. A., & Dhima, D. (2018). Experimental analysis on flexural behaviour of RC beams strengthened with CFRP laminates and under fire conditions. Composite Structures, 189, 516 – 528. doi: 10.1016/j.compstruct.2018.01.094 Danraka, M. N., Mahir Mahmod, H., Oluwatosin, O.-K. J., & Student, P. G. (2017). Strengthening of Reinforced Concrete Beams using FRP Technique: A Review. In International Journal of Engineering Science and Computing. Retrieved from http://ijesc.org/ EN 1992-1-2: Eurocode 2: Design of concrete structures - Part 1-2: General rules - Structural fire design. (1992). Firmo, J. P., Arruda, M. R. T., & Correia, J. R. (2015). Numerical simulation of the fire behaviour of thermally insulated reinforced concrete beams strengthened with EBR-CFRP strips. Composite Structures, 126, 360 – 370. doi: 10.1016/j.compstruct.2015.02.084 Firmo, J. P., Arruda, M. R. T., Correia, J. R., & Rosa, I. C. (2018). Three-dimensional finite element modelling of the fire behaviour of insulated RC beams strengthened with EBR and NSM CFRP strips. Composite Structures, 183(1), 124 – 136. doi: 10.1016/j.compstruct.2017.01.082 Firmo, J. P., & Correia, J. R. (2015a). Fire behaviour of thermally insulated RC beams strengthened with NSM-CFRP strips: Experimental study. Composites Part B: Engineering, 76, 112 – 121. doi: 10.1016/j.compositesb.2015.02.018 Firmo, J. P., & Correia, J. R. (2015b). Fire behaviour of thermally insulated RC beams strengthened with EBR-CFRP strips: Experimental study. Composite Structures, 122, 144 – 154. doi: 10.1016/j.compstruct.2014.11.063 Firmo, João P., Correia, J. R., & França, P. (2012). Fire behaviour of reinforced concrete beams strengthened with CFRP laminates: Protection systems with insulation of the anchorage zones. Composites Part B: Engineering, 43(3), 1545 – 1556. doi: 10.1016/j.compositesb.2011.09.002 Hawileh, R. A., & Kodur, V. K. R. (2018). Performance of reinforced concrete slabs under hydrocarbon fire exposure. Tunnelling and Underground Space Technology, 77, 177 – 187. doi: 10.1016/j.tust.2018.03.024 Hawileh, R. A., Naser, M., & Rasheed, H. A. (2011). Thermal-stress finite element analysis of CFRP strengthened concrete beam exposed to top surface fire loading. Mechanics of Advanced Materials and Structures, 18(3), 172 – 180. doi: 10.1080/15376494.2010.499019 Hawileh, R. A. (2012). Nonlinear finite element modeling of RC beams strengthened with NSM FRP rods. Construction and Building Materials, 27(1), 461 – 471. doi: 10.1016/j.conbuildmat.2011.07.018 Hawileh, R. A., Abu-Obeidah, A., Abdalla, J. A., & Al-Tamimi, A. (2015). Temperature effect on the mechanical properties of carbon, glass and carbon-glass FRP laminates. Construction and Building Materials, 75, 342 – 348. doi: 10.1016/j.conbuildmat.2014.11.020 Hawileh, R. A., & Rasheed, H. A. (2017). Thermal analysis of GFRP-reinforced continuous concrete decks subjected to top fire. International Journal of Advanced Structural Engineering, 9(4), 315 – 323. doi: 10.1007/s40091-017-0168-7 Nakaba, K., Kanakubo, T., Furuta, T., & Yoshizawa, H. (2001). 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