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Plasticity-Based Failure Criteria for Circular Concrete Columns Wrapped with FRPs
A powerful method of strengthening existing structures is to use fiber-reinforced polymer (FRP) wraps particularly for columns. Wrapping provides columns with confinement and increases their strength and performance. During the past decades, numerous researches have been performed on the characterization of concrete columns wrapped with FRPs. Therefore, a large experimental database is available that assists in determining the behavior of FRP-wrapped concrete columns. From the designer's point of view, both for analysis and for design, having failure criteria for FRP-wrapped concrete columns is crucial. There have been many proposed stress–strain models for concrete columns confined with FRPs. The majority of the proposed formulas were derived based on a statistic approach. Only a few formulas were derived based on mechanics-based methods such as plasticity-based approaches. The presence of a database, with almost 800 data points, on the behavior of FRP wrapped concrete columns with different FRP strength and modulus, thicknesses, number of layers, and diverse concrete properties was the motivation for conducting a research on developing new equations for the prediction of the confined concrete strength of circular concrete columns wrapped with FRPs. In this study, Hoek–Brown and Drucker-Prager models were used, and new equations for predicting the strength of confined concrete were introduced.
Plasticity-Based Failure Criteria for Circular Concrete Columns Wrapped with FRPs
A powerful method of strengthening existing structures is to use fiber-reinforced polymer (FRP) wraps particularly for columns. Wrapping provides columns with confinement and increases their strength and performance. During the past decades, numerous researches have been performed on the characterization of concrete columns wrapped with FRPs. Therefore, a large experimental database is available that assists in determining the behavior of FRP-wrapped concrete columns. From the designer's point of view, both for analysis and for design, having failure criteria for FRP-wrapped concrete columns is crucial. There have been many proposed stress–strain models for concrete columns confined with FRPs. The majority of the proposed formulas were derived based on a statistic approach. Only a few formulas were derived based on mechanics-based methods such as plasticity-based approaches. The presence of a database, with almost 800 data points, on the behavior of FRP wrapped concrete columns with different FRP strength and modulus, thicknesses, number of layers, and diverse concrete properties was the motivation for conducting a research on developing new equations for the prediction of the confined concrete strength of circular concrete columns wrapped with FRPs. In this study, Hoek–Brown and Drucker-Prager models were used, and new equations for predicting the strength of confined concrete were introduced.
Plasticity-Based Failure Criteria for Circular Concrete Columns Wrapped with FRPs
Lecture Notes in Civil Engineering
Benmokrane, Brahim (editor) / Mohamed, Khaled (editor) / Farghaly, Ahmed (editor) / Mohamed, Hamdy (editor) / Khorramian, Koosha (author) / Sadeghian, Pedram (author)
8th International Conference on Advanced Composite Materials in Bridges and Structures ; Chapter: 12 ; 99-108
2022-09-27
10 pages
Article/Chapter (Book)
Electronic Resource
English
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