Nonlinear finite element modeling of circular geopolymer concrete columns with GFRP bars and spirals

A Nonlinear finite element model was developed to simulate the performance of geopolymer concrete columns reinforced with fiber-reinforced polymer (FRP) bars. The proposed model was validated against experimental results performed previously by the authors. Several modeling parameters were investiga...

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Bibliographic Details
Main Authors: Megahed, Khaled, Amin, Fouad Mostafa, Al Hamaydeh, Mohammad
Format: Conference Proceeding
Language:English
Subjects:
Axial stress
Coefficient of friction
Compressive properties
Concrete columns
Fiber reinforced polymers
Finite element method
Geopolymers
Glass fiber reinforced plastics
Mathematical models
Modelling
Peak load
Shape factor
Yield stress
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Summary:A Nonlinear finite element model was developed to simulate the performance of geopolymer concrete columns reinforced with fiber-reinforced polymer (FRP) bars. The proposed model was validated against experimental results performed previously by the authors. Several modeling parameters were investigated, and it was found that changing mesh size, the ratio of biaxial compressive to uniaxial compressive yield stress, and friction coefficient between concrete and rebars had the least effectiveness among all modeling options. While increasing the shape factor or decreasing the dilation angle resulted in a larger error by decreasing the peak load of the specimen. The selected modeling options resulted in good matching results with the experimental ones. Finally, a framework for analyzing GFRP-reinforced GPC columns was introduced, thus allowing performing further detailed studies.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0194801