Ozbakkaloglu, TogayAkin, Emre2020-03-262020-03-2620121090-0268https://dx.doi.org/10.1061/(ASCE)CC.1943-5614.0000273https://hdl.handle.net/20.500.12395/27785An important application of fiber-reinforced polymer (FRP) composites is as a confining material for concrete, both in the seismic retrofit of existing reinforced concrete columns and in the construction of concrete-filled FRP tubes as earthquake-resistant columns in new construction. The reliable design of these structural members against earthquake-induced forces necessitates a clear understanding of the stress-strain behavior of FRP-confined concrete under load cycles. This paper presents the results of an experimental study on the behavior of FRP-confined normal-and high-strength concrete under axial compression. A total of 24 aramid and carbon FRP-confined concrete cylinders with different concrete strengths and FRP jacket thicknesses were tested under monotonic and cyclic loading. Examination of the test results has led to a number of significant conclusions in regards to both the trend and ultimate condition of the axial stress-strain behavior of FRP-confined concrete. These results are presented, and a discussion is provided on the influence of the main test parameters in the observed behaviors. The results are also compared with two existing cyclic axial stress-strain models for FRP-confined concrete. DOI: 10.1061/(ASCE)CC.1943-5614.0000273. (C) 2012 American Society of Civil Engineers.en10.1061/(ASCE)CC.1943-5614.0000273info:eu-repo/semantics/openAccessFiber-reinforced polymersConcreteHigh-strength concreteConfinementCyclic loadingStress-strain behaviorArticle164451463Q1WOS:000312664600009Q2