ANALYSIS OF CALCULATION METHOD OF CRITICAL LOADS FOR GLOBAL BUCKLING OFAXIALLY LOADED FRP MEMBERS WITH DOUBLY SYMMETRIC CROSS SECTIONS

doi:10.19936/j.cnki.2096-8000.20210628.009

Abstract

Abstract: This paper presents a test database of concentric compression experiments on fiber-reinforced polymer (FRP) specimens with doubly symmetric cross sections that failed in a global buckling mode published in literature between 1969 and 2020. The prediction accuracies of the five closed-form solutions recommended by Euler, Engesser, Haringx, Strongwell and Fiberline corporations which can be used to predict the global buckling loads of FRP members with doubly symmetric cross sections were evaluated according to the test database. The results show that the classical Euler formula overestimates the experimentally obtained capacity by 16.7%, and the average absolute error (AAE) is approximately 18.1%. Because the effect of shear deformation is considered in Engesser and Haringx shear correction formulae, the two solutions overestimates the capacity by only 8.4% and 9.5%, respectively, and the AAE values are approximately 11.3% and 12.0%, respectively. The formula recommended by Fiberline Composites underestimates the experimentally measured capacity by 12.5%, and the AAE is approximately 14.3%. The formula recommended by Strongwell Corporation significantly overestimates the experimentally obtained capacity by 118.2%, and the AAE is approximately 118.2%. Considering the prediction accuracy, the Engesser shear correction formula is recommended to be used to predict the global buckling loads of FRP members with doubly symmetric cross sections.

Key words: FRP members with doubly symmetric cross sections, global buckling, critical load, prediction accuracy, composites

CLC Number:

TB332

ZHAN Yang, LI Ben-ben, CUI Jing, YANG Ya-qiang. ANALYSIS OF CALCULATION METHOD OF CRITICAL LOADS FOR GLOBAL BUCKLING OFAXIALLY LOADED FRP MEMBERS WITH DOUBLY SYMMETRIC CROSS SECTIONS[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(6): 58-64.

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