Numerical Parametric Study and Design of Pultruded GFRP Composite Channel Columns

M Anbarasu (), M Kasiviswanathan (), M Kathiresan and G Mohan Ganesh
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M Anbarasu: Department of Civil Engineering, Government College of Engineering, Salem 636011, Tamil Nadu, India
M Kasiviswanathan: Department of Civil Engineering, Sona College of Technology, Salem 636005, Tamil Nadu, India
M Kathiresan: Department of Mechanical Engineering, National Engineering College, Kovilpatti 628503, Tamil Nadu, India
G Mohan Ganesh: Department of Structural and Geotechnical Engineering, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India

Sustainability, 2023, vol. 15, issue 1, 1-20

Abstract: This article reports the finite element (FE) investigation of the axial capacities of pultruded fiber-reinforced polymer (PFRP) composite channel columns. The nonlinear finite element model (FEM) was developed by using the ABAQUS package for glass fiber-reinforced polymer (GFRP) composite channel columns, which included geometric and initial geometric imperfections. The developed FEMs were verified against an experimental result available in the literature for GFRP channel columns. The validated FEMs were used to carry out the parametric study comprising 61 FE models to investigate the effect of different geometries, plate slenderness and the length of members on the axial capacities of GFRP pultruded channel columns. The results obtained from the parametric study were used to examine the accuracy of the current Italian guidelines, American pre-standard and the Direct Strength Method (DSM) proposed in the literature for GFRP channel profiles. Based on the obtained results, the suitability of the current design guidelines is assessed and, also, a new set of design equations is proposed to estimate the axial capacity of the pultruded GFRP channel columns. The new proposed set of reliable design equations witnessed a less scattered and a high degree of accuracy in determining the axial load capacity of the pultruded GFRP composite channel columns.

Keywords: GFRP; channel columns; local buckling; pultruded sections; FE analysis (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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