A STRESS-STRAIN MODEL FOR REINFORCED CONCRETE COLUMNS CONFINED BY LATERAL REINFORCEMENT

Abstract

In this paper, a stress-strain relationship of concrete which takes account of confinement effectiveness is proposed based on a series of loading tests for reinforced concrete column specimens. Reinforced concrete column specimens, with circular and square cross section, including various hoop reinforcement, were loaded. Predominant factors for controlling the stress-strain relation of the concrete columns were examined, and stress-strain model consisiting of exponential function and straight line is proposed. The predicted relation agreed quite well with the test results.