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Interaction Diagram of Short Concrete Columns Reinforced with GFRP Rebars
https://orcid.org/http://orcid.org/0000-0002-6346-2021
https://orcid.org/http://orcid.org/0000-0001-5102-7041
Glass fiber-reinforced polymer (GFRP) rebars have been gaining attention due to their relatively lower cost and corrosion-resistant properties. However, there has been a lack of research on their compression capacity, resulting in their limited use in compression members. Columns are usually subjected to axial load and bending moments due to load eccentricity caused by construction imperfections, accidental loads, or architectural requirements. Column interaction diagrams are used to represent the axial and flexural resistance of reinforced concrete columns, where the magnitude of load eccentricity can significantly affect the behavior of the column. This study aims to investigate the effect of considering the compressive strength of GFRP longitudinal rebars on the interaction diagram of GFRP-reinforced concrete columns and to determine what is lost when their contribution to load-bearing under compression is limited or neglected. Two commonly used stress–strain relationships of concrete in compression were employed, and the model was verified against existing literature. Comparative and parametric studies were conducted to improve understanding of the interaction diagrams. Limiting the compressive GFRP strain of rebars to 0.002 or neglecting their compressive strength resulted in a reduction of load-bearing capacity in the column by about 5% to 17%. It was also observed that the contribution of concrete mostly affects the belly point in the interaction diagram of the GFRP-RC short columns, and the location of the balance point in GFRP-RC columns does not necessarily lie at the belly point.
Interaction Diagram of Short Concrete Columns Reinforced with GFRP Rebars
https://orcid.org/http://orcid.org/0000-0002-6346-2021
https://orcid.org/http://orcid.org/0000-0001-5102-7041
Glass fiber-reinforced polymer (GFRP) rebars have been gaining attention due to their relatively lower cost and corrosion-resistant properties. However, there has been a lack of research on their compression capacity, resulting in their limited use in compression members. Columns are usually subjected to axial load and bending moments due to load eccentricity caused by construction imperfections, accidental loads, or architectural requirements. Column interaction diagrams are used to represent the axial and flexural resistance of reinforced concrete columns, where the magnitude of load eccentricity can significantly affect the behavior of the column. This study aims to investigate the effect of considering the compressive strength of GFRP longitudinal rebars on the interaction diagram of GFRP-reinforced concrete columns and to determine what is lost when their contribution to load-bearing under compression is limited or neglected. Two commonly used stress–strain relationships of concrete in compression were employed, and the model was verified against existing literature. Comparative and parametric studies were conducted to improve understanding of the interaction diagrams. Limiting the compressive GFRP strain of rebars to 0.002 or neglecting their compressive strength resulted in a reduction of load-bearing capacity in the column by about 5% to 17%. It was also observed that the contribution of concrete mostly affects the belly point in the interaction diagram of the GFRP-RC short columns, and the location of the balance point in GFRP-RC columns does not necessarily lie at the belly point.
Interaction Diagram of Short Concrete Columns Reinforced with GFRP Rebars
https://orcid.org/http://orcid.org/0000-0002-6346-2021
https://orcid.org/http://orcid.org/0000-0001-5102-7041
Glass fiber-reinforced polymer (GFRP) rebars have been gaining attention due to their relatively lower cost and corrosion-resistant properties. However, there has been a lack of research on their compression capacity, resulting in their limited use in compression members. Columns are usually subjected to axial load and bending moments due to load eccentricity caused by construction imperfections, accidental loads, or architectural requirements. Column interaction diagrams are used to represent the axial and flexural resistance of reinforced concrete columns, where the magnitude of load eccentricity can significantly affect the behavior of the column. This study aims to investigate the effect of considering the compressive strength of GFRP longitudinal rebars on the interaction diagram of GFRP-reinforced concrete columns and to determine what is lost when their contribution to load-bearing under compression is limited or neglected. Two commonly used stress–strain relationships of concrete in compression were employed, and the model was verified against existing literature. Comparative and parametric studies were conducted to improve understanding of the interaction diagrams. Limiting the compressive GFRP strain of rebars to 0.002 or neglecting their compressive strength resulted in a reduction of load-bearing capacity in the column by about 5% to 17%. It was also observed that the contribution of concrete mostly affects the belly point in the interaction diagram of the GFRP-RC short columns, and the location of the balance point in GFRP-RC columns does not necessarily lie at the belly point.
Interaction Diagram of Short Concrete Columns Reinforced with GFRP Rebars
Lecture Notes in Civil Engineering
Desjardins, Serge (editor) / Poitras, Gérard J. (editor) / El Damatty, Ashraf (editor) / Elshaer, Ahmed (editor) / Sadat Hosseini, Alireza (author) / Sadeghian, Pedram (author)
Canadian Society of Civil Engineering Annual Conference ; 2023 ; Moncton, NB, Canada
Proceedings of the Canadian Society for Civil Engineering Annual Conference 2023, Volume 10 ; Chapter: 16 ; 213-223
2024-09-03
11 pages
Article/Chapter (Book)
Electronic Resource
English
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