Analysis of calculation methods for local buckling critical load of non-uniform cross-section GFRP compression member

doi:10.19936/j.cnki.2096-8000.20250928.011

Abstract

Abstract: To investigate the impact of asymmetry due to unequal web and flange thickness in box-section GFRP columns on local buckling critical force prediction accuracy, this study established a nonlinear finite element model using ABAQUS. The model was validated through comparison with experimental results, and existing methods for calculating the local buckling critical force were evaluated. Based on these methods, a new optimized equation was proposed. Compared with finite element results, the optimized equation’s critical load predictions are 5% lower, with an average absolute error (AAE) of 6.58% and a standard deviation (SD) of 7.1%, which indicated low dispersion. This demonstrated the optimized equation’s effectiveness in predicting the local buckling critical force of non-uniform thickness GFRP compression members and provided a reliable design choice.

Key words: non-uniform cross-section, GFRP, local buckling, critical force, compression member

CLC Number:

TB332

KANG Ertao, XIAO Xiao, ZHANG Tieshan. Analysis of calculation methods for local buckling critical load of non-uniform cross-section GFRP compression member[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(9): 84-92.

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