FRP-confined concrete in circular sections: Review and assessment of stress–strain models

Axial compressive behavior of FRP-confined concrete: Experimental test database and a new design-oriented model

“…As reported in Ozbakkaloglu et al [1] almost all of the better performing ultimate strain enhancement expressions proposed in the literature have non-linear forms in their predictions of the strain enhancement ratio (ε cu / ε co ) as a function of confinement ratios (f lu,a / f' co ) (e.g. [42,43]).…”

“…5) incorporates several important parameters which were previously identified in Ozbakkaloglu et al [1]. The strength enhancement effect at the first peak stress (f' c1 ) of the stress-strain response is captured using Eq.…”

“…A large number of experimental studies have produced over 3000 test results on FRP-confined concrete and resulted in the development of over 90 axial stress-axial strain models, 88 of which were recently reviewed and assessed in Ozbakkaloglu et al [1]. It became evident from the results of the assessment reported in Ozbakkaloglu et al [1] the performances of a large proportion of the existing models were compromised when assessed against a large test database with a parametric range that is much wider than the databases used in the development of these models. These observations clearly revealed the need for an extensive and reliable experimental test database of FRP-confined concrete for the development of models of higher accuracy.…”

Compressive behavior of concrete-filled FRP tube columns: Assessment of critical column parameters

“…As an important 3 application of FRP composites, confinement of existing reinforced concrete columns with FRP 4 jackets has been investigated extensively [1]. More recently, attention has turned to the 5 potential applications of FRP composites for new structures.…”

Factors Influencing Hoop Rupture Strains of FRP-Confined Concrete

“…The use of fiber reinforced polymer (FRP) composites as a confinement material for concrete has received a great deal of attention over the past two decades [1] and it has been demonstrated that FRP-confined concrete columns develop highly ductile behavior under simulated seismic loading [2][3][4][5]. The key requirement for the accurate prediction of the ultimate axial stress and strain of FRP-confined concrete is the accurate prediction of the hoop rupture strain developed by the confining FRP jacket.…”