Higher-Order Effects in Biaxial Flexure of GFRP I-Section Beams
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Submitted Dec 27, 2022
Published Mar 15, 2023
Published Mar 15, 2023
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A theoretical study of Glass Fiber Reinforced Polymer (GFRP) beams subjected to biaxial bending moments is presented with a focus on the influence of higher-order effects on maximum normal stresses. It is shown that the biaxial bending type of loading causes a dramatic increase in the maximum normal stress for a GFRP beam when induced torsional effects are included. The study demonstrates that the traditional first-order theory can grossly underestimate the maximum normal stress in a GFRP beam. Based on the numerical results presented using a higher-order theory which also accounts for induced warping normal stresses, the maximum normal stress is found to be about two to three times larger than that determined using the first-order theory.
Keywords: Biaxial Flexure, Glass Fiber Reinforced Polymer (GFRP), Higher-Order Effects, I-Section Beams
References
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Sirjani MB, Razzaq Z. Unsymmetric and Biaxial Bending of FRP Angle Sections. Journal of Reinforced Plastics and Composites, 2005; 24(18).
Gyebi KM, Razzaq Z. Glass Fiber Reinforced Polymer (GFRP) angle-section member under biaxial flexure. Proceedings of the 2nd International Conference on Composites, Porto, Portugal; 2016.
Sirjani MB, Razzaq Z. Combined Biaxial Bending and Torsion of FRP I-Section Members at Cracking. Proceedings of the 14th International Conference on Composites/Nano Engineering (ICCE/14), Boulder, Colorado; 2006.
Galambos TV. Structural Members and Frames. Englewood Cliffs, NJ: Prentice-Hall, Inc.; 1968.
Knorowski J, Bondi SB, Razzaq Z. Lateral-torsional instability and biaxial bending of FRP I-beams. European Journal of Engineering and Technology Research, 2022;7(6):29-34.
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How to Cite
[1]
Razzaq, Z. and Razzaq, F.Z. 2023. Higher-Order Effects in Biaxial Flexure of GFRP I-Section Beams. European Journal of Engineering and Technology Research. 8, 2 (Mar. 2023), 16–18. DOI:https://doi.org/10.24018/ejeng.2023.8.2.2967.
This work is licensed under a Creative Commons Attribution 4.0 International License.
