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Title: Deterministic and stochastic finite element modeling of reinforced concrete beams without stirrups containing plastic wastes
Authors: Ghannoum, Maria 
Assaad, Joseph 
Daaboul, Michel 
El-Mir, Abdulkader 
Affiliations: Department of Civil and Environmental Engineering 
Department of Civil and Environmental Engineering 
Department of Mechanical Engineering 
Department of Civil and Environmental Engineering 
Keywords: Deterministic
Finite element modeling
Polyethylene terephthalate
Reinforced concrete beams
Shear strength
Waste plastics
Issue Date: 2024-01-01
Publisher: Emerald
Part of: International Journal of Building Pathology and Adaptation
Purpose: The use of waste polyethylene terephthalate (PET) plastics derived from shredded bottles in concrete is not formalized yet, especially in reinforced members such as beams and columns. The disposal of plastic wastes in concrete is a viable alternative to manage those wastes while minimizing the environmental impacts associated to recycling, carbon dioxide emissions and energy consumption. Design/methodology/approach: This paper evaluates the suitability of 2D deterministic and stochastic finite element (FE) modeling to predict the shear strength behavior of reinforced concrete (RC) beams without stirrups. Different concrete mixtures prepared with 1.5%–4.5% PET additions, by volume, are investigated. Findings: Test results showed that the deterministic and stochastic FE approaches are accurate to assess the maximum load of RC beams at failure and corresponding midspan deflection. However, the crack patterns observed experimentally during the different stages of loading can only be reproduced using the stochastic FE approach. This later method accounts for the concrete heterogeneity due to PET additions, allowing a statistical simulation of the effect of mechanical properties (i.e. compressive strength, tensile strength and Young’s modulus) on the output FE parameters. Originality/value: Data presented in this paper can be of interest to civil and structural engineers, aiming to predict the failure mechanisms of RC beams containing plastic wastes, while minimizing the experimental time and resources needed to estimate the variability effect of concrete properties on the performance of such structures.
ISSN: 23984708
DOI: 10.1108/IJBPA-10-2023-0156
Open URL: Link to full text
Type: Journal Article
Appears in Collections:Department of Civil and Environmental Engineering
Department of Mechanical Engineering

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