Strength interaction (P-M) analyses of rectangular concrete columns reinforced with fiber-reinforced polymer (FRP) bars identified two failure mechanisms: premature-compression failure and brittle-tension failure. The study concluded that brittle-tension failure was more likely to occur due to the low ultimate tensile strain of FRP bars. In this paper, an analytical approach is presented to identify both failures and to avert brittle-tension failure of such columns to a failure controlled by concrete crushing. This is achieved by providing a reinforcement ratio ρf that is greater than a minimum required reinforcement ratio ρf,min. Interaction diagrams in the form of tensile elastic modulus-tensile strain (Eft-εft) have been developed to facilitate the determination of ρf,min. The proposed approach permits the evaluation of rectangular concrete columns reinforced with FRP bars to be carried out in a manner similar to steel-reinforced concrete columns.
|Number of pages||7|
|Journal||ACI Structural Journal|
|State||Published - May 2006|
- Reinforcement ratio
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction