STRESS-STRAIN RELATIONSHIP OF HIGH-STRENGTH CONCRETE IN COMPRESSION

An experimental investigation was carried out to generate the complete stress-strain curves of concrete in compression with a strength range of 50-120 MPa. The variation in concrete strength was achieved by var ying the water-to-binder ratio of the mix, types of cement replacing a dmixture, replacement percentages, and the age at testing. The effects of these parameters on the shape of stress-strain curves are presente d and discussed The accuracy of predictions of a number of analytical models available in the literature are also discussed. Based on presen t test data, a simple model is proposed to generate the complete stres s-strain relationships for high-strength concrete. The proposed model has been found to give a good representation of the actual stress-stra in response.