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. 2021 Nov 28;13(23):4159. doi: 10.3390/polym13234159

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Interaction between local buckling and compressive failure of I-shape PFRP columns with different cross-sectional aspect ratios: (a) strength curve with experimental points (P_u: the ultimate compressive load, P_L,C: the experimental buckling load, and P_cr,l: the critical buckling load); (b) experimental failure mode of I₁ (b_f/d = 0.5); (c) experimental failure mode of I₂ (b_f/d = 0.75); and (d) experimental failure mode of I₃ (b_f/d = 1.0) [69].