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Constitutive Model for Rubberized Concrete Passively Confined with FRP Laminates

Raffoul, Samar / Escolano-Margarit, David / Garcia, Reyes / Guadagnini, Maurizio / Pilakoutas, Kypros

This article develops an analysis-oriented stress-strain model for rubberized concrete (RuC) passively confined with fiber-reinforced polymer (FRP) composites. The model was calibrated using highly instrumented experiments on 38 cylinders with high rubber content (60% replacement of the total aggregate volume) tested under uniaxial compression. Parameters investigated include cylinder size ( $diameter \times height$ : $100 \times 200 mm$ or $150 \times 300 mm$ ), as well as amount (two, three, four, or six layers) and type of external confinement (carbon or aramid FRP sheets). FRP-confined rubberized concrete (FRP CRuC) develops high confinement effectiveness ( $f_{cc} / f_{co}$ up to 11) and extremely high deformability (axial strains up to 6%). It is shown that existing stress-strain models for FRP-confined conventional concrete do not predict the behavior of such highly deformable FRP CRuC. Based on the results, this study develops a new analysis-oriented model that predicts accurately the behavior of such concrete. This article contributes toward developing advanced constitutive models for analysis/design of sustainable high-value FRP CRuC components that can develop high deformability.

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Constitutive Model for Rubberized Concrete Passively Confined with FRP Laminates

Raffoul, Samar / Escolano-Margarit, David / Garcia, Reyes / Guadagnini, Maurizio / Pilakoutas, Kypros

This article develops an analysis-oriented stress-strain model for rubberized concrete (RuC) passively confined with fiber-reinforced polymer (FRP) composites. The model was calibrated using highly instrumented experiments on 38 cylinders with high rubber content (60% replacement of the total aggregate volume) tested under uniaxial compression. Parameters investigated include cylinder size ( $diameter \times height$ : $100 \times 200 mm$ or $150 \times 300 mm$ ), as well as amount (two, three, four, or six layers) and type of external confinement (carbon or aramid FRP sheets). FRP-confined rubberized concrete (FRP CRuC) develops high confinement effectiveness ( $f_{cc} / f_{co}$ up to 11) and extremely high deformability (axial strains up to 6%). It is shown that existing stress-strain models for FRP-confined conventional concrete do not predict the behavior of such highly deformable FRP CRuC. Based on the results, this study develops a new analysis-oriented model that predicts accurately the behavior of such concrete. This article contributes toward developing advanced constitutive models for analysis/design of sustainable high-value FRP CRuC components that can develop high deformability.

Constitutive Model for Rubberized Concrete Passively Confined with FRP Laminates

Raffoul, Samar / Escolano-Margarit, David / Garcia, Reyes / Guadagnini, Maurizio / Pilakoutas, Kypros

This article develops an analysis-oriented stress-strain model for rubberized concrete (RuC) passively confined with fiber-reinforced polymer (FRP) composites. The model was calibrated using highly instrumented experiments on 38 cylinders with high rubber content (60% replacement of the total aggregate volume) tested under uniaxial compression. Parameters investigated include cylinder size ( $diameter \times height$ : $100 \times 200 mm$ or $150 \times 300 mm$ ), as well as amount (two, three, four, or six layers) and type of external confinement (carbon or aramid FRP sheets). FRP-confined rubberized concrete (FRP CRuC) develops high confinement effectiveness ( $f_{cc} / f_{co}$ up to 11) and extremely high deformability (axial strains up to 6%). It is shown that existing stress-strain models for FRP-confined conventional concrete do not predict the behavior of such highly deformable FRP CRuC. Based on the results, this study develops a new analysis-oriented model that predicts accurately the behavior of such concrete. This article contributes toward developing advanced constitutive models for analysis/design of sustainable high-value FRP CRuC components that can develop high deformability.

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Title:

Constitutive Model for Rubberized Concrete Passively Confined with FRP Laminates

Contributors:

Raffoul, Samar (author) / Escolano-Margarit, David (author) / Garcia, Reyes (author) / Guadagnini, Maurizio (author) / Pilakoutas, Kypros (author)

Published in:

Journal of Composites for Construction ; 23

Publication date:

2019-08-27

ISSN:

1090-0268 , 1943-5614

DOI:

https://doi.org/10.1061/(ASCE)CC.1943-5614.0000972

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

Unknown

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