Title: ANALYTICAL AND EXPERIMENTAL EVALUATION OF GFRP REINFORCED CONCRETE COLUMNS SUBJECTED TO AXIAL LOADING

Authors: D. R. Panchal, Milan D. Lilapara

DOI: https://doi.org/10.33599/GL.2026.INCOMAT.TP26-0006

Abstract: To assess the performance of Glass Fiber Reinforced Polymer (GFRP) reinforced concrete columns under axial loading, we have examined their axial behaviour utilizing both experimental testing and numerical modelling [7,8]. GFRP is becoming more popular in the building sector as a lightweight, non-corrosive substitute for steel. However, because of its brittle failure properties and lower modulus of elasticity, its compressive performance is still a worry. Twelve full-scale concrete columns were cast and tested under concentric axial loads to address this, and the load capacity and failure modes of the findings were examined. To simulate the structural response, a parallel Finite Element Analysis (FEA) [9,10] was carried out using ABAQUS software with the Concrete Damaged Plasticity model. The model's validity was confirmed by key findings, which showed that the experimentally observed axial load capacity nearly matched FEA predictions. Due to their brittle and elastic character, longitudinal GFRP bars did not exhibit any indicators of rupture, and typical failure was caused by concrete crushing. Improved ductility and delayed failure were seen in specimens with a higher reinforcement ratio. According to the study, GFRP bars do add to axial strength, and as reinforcement ratios increase, so does their impact. Important structural phenomena like peak load and failure progression were well captured by the finite element model. Sensitivity to the slenderness ratio and reinforcement ratio was demonstrated by parametric investigations utilizing validated models.

References: [1] ACI 440.1R-15. Guide for the Design and Construction of Structural Concrete Reinforced with Fiber-Reinforced Polymer (FRP) Bars. Farmington Hills, MI: American Concrete Institute, 2015. [2] CSA S806-12. Design and Construction of Building Structures with Fibre-Reinforced Polymers. Toronto: Canadian Standards Association, 2012 (R2021). [3] Abdelazim, Waseem, Hamdy M. Mohamed, and Brahim Benmokrane. "Effect of Slenderness Ratio on the Performance of Concrete Columns Reinforced with GFRP Bars and Spirals." Growing with Youth Conference. Laval, QC, June 12-15, 2019. [4] Raza, Ali, and Qaiser Uz Zaman Khan. "Experimental and Theoretical Study of GFRP Hoops and Spirals in Hybrid Fiber Reinforced Concrete Short Columns." Materials and Structures 53(139) (2020). DOI: 10.1617/s11527-020-01575-9. [5] Elmesalami, Nouran, Farid Abed, and Ahmed El Refai. "Concrete Columns Reinforced with GFRP and BFRP Bars under Concentric and Eccentric Loads: Experimental Testing and Analytical Investigation." Journal of Composites for Construction 25(2) (2021): 04021003. DOI: 10.1061/(ASCE)CC.1943-5614.0001115. [6] Niyazuddin, Trupti A. Kinjawadekar, Praveen Nagarajan, and A. P. Shashikala. "Design of Short Columns Reinforced with GFRP Bars Subjected to Axial Loading." IOP Conference Series: Materials Science and Engineering 936(1) (2020): 012003. DOI: 10.1088/1757-899x/936/1/012003. [7] Tahir, Muhammad, Zhenyu Wang, Zhou Wei, and Rizwan Jameel. "Numerical and Analytical Modeling of FRP-Reinforced Concrete Columns Subjected to Compression Loading." Australian Journal of Structural Engineering 22(2) (2021): 96-109. DOI: 10.1080/13287982.2021.1923158. [8] Raza, Ali, Qaiser Uz Zaman Khan, and Afaq Ahmad. "Numerical Investigation of Load-Carrying Capacity of GFRP-Reinforced Rectangular Concrete Members Using CDP Model in ABAQUS." Advances in Civil Engineering 2019 (2019): 1745341. DOI: 10.1155/2019/1745341. [9] Hussein A., and Abdul Muttailb I. Said. "Finite Element Analysis of Axially Loaded GFRP-Reinforced Concrete Hollow Square Columns." E3S Web of Conferences 427 (2023): 02023. DOI: 10.1051/e3sconf/202342702023. [10] Abed, Farid, Chahmi Oucif, Yousef Awera, Haya H. Mhanna, and Hakem Alkhraisha. "FE Modeling of Concrete Beams and Columns Reinforced with FRP Composites." Defence Technology (2020). DOI: 10.1016/j.dt.2020.02.015. [11] IS 18255 “Fibre-Reinforced Polymer (FRP) Bars for Concrete Reinforcement Methods of Test”. Bureau of Indian Standards (BIS), 2023. [12] IS 10262. Concrete Mix Proportioning — Guidelines (Second Revision). New Delhi: Bureau of Indian Standards, 2019. [13] ASTM Standard D3418-21, 2021, "Standard Test Method for Transition Temperatures and Enthalpies of Fusion and Crystallization of Polymers by Differential Scanning Calorimetry" ASTM International, West Conshohocken, PA, 2021.

Conference: INCOMAT 2026

Publication Date: 2026/03/13

SKU: INCOMAT.TP26-0006

Pages: 8

Price: $16.00