_____________________________________________________________________________________________________ # Professor; ¥ Assistant Professor; ‡ MSc Student; *Corresponding author: Email: nourhan_magdy24@yahoo.com; Journal of Engineering Research and Reports 21(12): 43-52, 2021; Article no.JERR.84333 ISSN: 2582-2926 Nonlinear Finite Element Analysis for Concrete Deep Beam Reinforced with GFRP Bars Mohamed Said a# , Tamer Mahmoud EL-Rakeeb b# , Ahmed Salah c¥ and Nourhan Magdy Mohammed c*‡ a Shoubra Faculty of Engineering, Benha University, Egypt. b Housing and Building Research Center (HBRC-Cairo), Egypt. c Shoubra Faculty of Engineering, Benha University, Egypt. Authors’ contributions This work was carried out in collaboration among all authors. All authors read and approved the final manuscript. Article Information DOI: 10.9734/JERR/2021/v21i1217517 Open Peer Review History: This journal follows the Advanced Open Peer Review policy. Identity of the Reviewers, Editor(s) and additional Reviewers, peer review comments, different versions of the manuscript, comments of the editors, etc are available here: https://www.sdiarticle5.com/review-history/84333 Received 25 October 2021 Accepted 28 December 2021 Published 30 December 2021 ABSTRACT This work investigates the behavior of concrete deep beams reinforced with GFRP bars by conducting an experimental test on a half-scale GFRP deep beam and evaluating the findings by ANSYS software. Also, ANSYS was used to perform nonlinear finite element analysis NLFEA on five specimens with different reinforcement ratios of GFRP bars (0.15%, 0.41%, 0.53%, 0.67%, and 0.79%) to examine the influence of the GFRP reinforcement ratio on the behavior of deep beams. The outcomes of the experiment were sufficiently reflected in the analysis. The program's viability was confirmed by comparing it to accessible experimental data, and the agreement was found to be acceptable. Throughout the loading stages, the NLFEA produced a reasonable estimate of the center deflection for the test specimen. It was established that raising the specimen's reinforcement ratio led to an increase in beam capacity by (10 %, 18%, 31% and 47%) for reinforcement ratios (0.41%, 0.53%, 0.67% and 0.79%) and also the ultimate stiffness increased by (6%, 7%, 29%, and 44%) compared to specimen B1. Also found that the energy absorption enhanced by (23 %, 38 %, 106 %, and 152 %), on the opposite, this increase causes the specimen's deflection to decrease by (11 %, 17%, 52%, and 66%) by comparing to specimen B1. From the outputs results, it was found that the code provision was more conservative than the analytical model. For future work, Original Research Article