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Time-Dependent Behavior of Concrete-Filled FRP Tubes under Sustained Loading

Naguib, Wassim / Mirmiran, Amir

Time-dependent behavior of hybrid systems made of concrete and fiber reinforced polymer tubes (FRP) is affected by the interaction between the two materials as well as their interface bond. A number of creep tests were carried out to predict the behavior of such hybrid systems under sustained axial or flexural loads. Results indicate that current ACI models grossly overestimate the creep of concrete-filled tubes. A nonlinear creep model was developed to account for the different creep properties of concrete and FRP, and the stress re-distribution that takes place between the two materials over time. The model can also be used for concrete-filled steel tubes. Based on the experimental and analytical investigations, changes are proposed to the current ACI creep coefficients for concrete-filled tubes.

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Time-Dependent Behavior of Concrete-Filled FRP Tubes under Sustained Loading

Naguib, Wassim / Mirmiran, Amir

Time-dependent behavior of hybrid systems made of concrete and fiber reinforced polymer tubes (FRP) is affected by the interaction between the two materials as well as their interface bond. A number of creep tests were carried out to predict the behavior of such hybrid systems under sustained axial or flexural loads. Results indicate that current ACI models grossly overestimate the creep of concrete-filled tubes. A nonlinear creep model was developed to account for the different creep properties of concrete and FRP, and the stress re-distribution that takes place between the two materials over time. The model can also be used for concrete-filled steel tubes. Based on the experimental and analytical investigations, changes are proposed to the current ACI creep coefficients for concrete-filled tubes.

Time-Dependent Behavior of Concrete-Filled FRP Tubes under Sustained Loading

Naguib, Wassim / Mirmiran, Amir

Time-dependent behavior of hybrid systems made of concrete and fiber reinforced polymer tubes (FRP) is affected by the interaction between the two materials as well as their interface bond. A number of creep tests were carried out to predict the behavior of such hybrid systems under sustained axial or flexural loads. Results indicate that current ACI models grossly overestimate the creep of concrete-filled tubes. A nonlinear creep model was developed to account for the different creep properties of concrete and FRP, and the stress re-distribution that takes place between the two materials over time. The model can also be used for concrete-filled steel tubes. Based on the experimental and analytical investigations, changes are proposed to the current ACI creep coefficients for concrete-filled tubes.

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Title:

Time-Dependent Behavior of Concrete-Filled FRP Tubes under Sustained Loading

Contributors:

Naguib, Wassim (author) / Mirmiran, Amir (author)

Conference:

Structures Congress 2001 ; 2001 ; Washington, D.C., United States

Published in:

Structures 2001 ; 1-2

Publication date:

2001-05-18

ISBN:

DOI:

https://doi.org/10.1061/40558(2001)147

Type of media:

Conference paper

Type of material:

Electronic Resource

Language:

English

Keywords:

Structural engineering , Concrete , Rehabilitation , Tubes , Fiber reinforced materials , Time dependence

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