Numerical Simulations of GFRP-Reinforced Columns Having Polypropylene and Polyvinyl Alcohol Fibers

The present investigation aims to propose a numerical model for assessing the complex damaging response of glass fiber-reinforced polymer- (GFRP-) reinforced concrete columns having hybrid fibers and confined with GFRP spirals (GFHF columns) under concentric and eccentric compression. Fiber-reinforc...

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Bibliographic Details
Published in:Complexity (New York, N.Y.) N.Y.), 2020, Vol.2020 (2020), p.1-14
Main Authors: Raza, Syed Safdar, Anwar, Muhammad Kashif, Raza, Ali, Bai, Yong, Nawaz, Ahsan, Ali, Liaqat, Raheel Shah, Syyed Adnan
Format: Article
Language:English
Subjects:
Aggregates
Analysis
Bars
Comparative studies
Complex systems
Composite materials
Concrete
Concrete columns
Corrosion
Damage
Ductility
Eccentric loads
Fiber reinforced concretes
Fiber reinforced polymers
Finite element analysis
Finite element method
Glass fiber reinforced plastics
Mathematical models
Mechanical properties
Numerical analysis
Numerical models
Polypropylene
Polyvinyl alcohol
Reinforced concrete
Simulation
Spirals
Tensile strength
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Summary:The present investigation aims to propose a numerical model for assessing the complex damaging response of glass fiber-reinforced polymer- (GFRP-) reinforced concrete columns having hybrid fibers and confined with GFRP spirals (GFHF columns) under concentric and eccentric compression. Fiber-reinforced concrete (FRC) consists of polyvinyl alcohol fibers (PVA) and polypropylene fibers (PF). A total of six GFHF circular columns were constructed having a circular cross section of 250 mm and a height of 1200 mm. A commercial package ABAQUS was used for the finite element analysis (FEA) of the GFHF columns by using a modified concrete damage plastic (CDP) model for hybrid fiber-reinforced concrete (HFRC). The damaging response of GFRP bars was defined using a linear elastic model. The results depicted that the failure of GFHF columns occurred either in the upper or in the lower half portion with the rupture of GFRP longitudinal bars and GFRP spirals. The decrease in the pitch of GFRP spirals led to an improvement in the axial strength (AS) of GFHF columns. The eccentric loading caused a significant reduction in the AS of columns. The comparative study solidly substantiates the validity and applicability of the newly developed FEA models for capturing the AS of GFHF columns by considering the axial involvement of longitudinal GFRP bars and the confinement effect of transverse GFRP spirals. So, the suggested numerical model having a complex system of equations for HFRC can be used for the accurate analysis of HFRC members.
ISSN:1076-2787
1099-0526
DOI:10.1155/2020/8841795