Refinement of an Ultimate Strain Model for Circular Concrete Columns Retrofitted with FRP Based on a Most Comprehensive Test Database

Abstract:

The retrofitting technique of externally wrapped by fiber reinforced polymer (FRP) can significantly enhance the deformability or ductility of deficient concrete columns. This paper develops a new advanced ultimate strain model for circular columns confined with FRP jacket based on a most updated and comprehensive test database where more than 800 axial compression test results of FRP confined circular concrete columns were collected newly. This work began with a careful review on some existing ultimate strain models after which an in-depth comparison between models predictions and experimental test results was conducted. The comparisons revealed that more or less defects of the existing models were detected and there existed large errors of their predictions as a much larger amount of columns than that used in the models derivations were evaluated. It is therefore necessary and of significance to refine a new advanced ultimate model in the paper.

• Periodical: Applied Mechanics and Materials (Volumes 275-277)
• Pages: 1233-1238
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.275-277.1233
• Online since: January 2013
• Authors: Ying Wu Zhou, Feng Xing, Li Li Sui
• Keywords: Column, Confined Concrete, FRP, Test Database, Ultimate Strain Model

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