Abstract

This paper present the results of tests of 12 high-strength reinforced concrete columns subjected eccentric loading. The test parameters included the concrete compressive strength (50 - 72 MPa), longitudinal reinforcement ratio, load eccentricities and volumetric ratio of confinement reinforcement. From the test results shows that the ductility of confined concrete tends decreases when the concrete strength increases. A confined concrete model, developed on the basis of column tests under concentric loading, was used to compute analytical momen-curvature relationships. The model are compared with those recorded experimentally. The comparisons indicate that the flexural behaviour of confined concrete columns can be computed reasonably accurately by a confined concrete model.

Keywords: high-strength concrete, confinement, eccentric loading.