Stress–strain relationship of normal, high-strength and lightweight concrete

A simple mathematical model to generate a full spectrum (ascending and descending portions) of the stress-strain curves for normal, high- strength and lightweight concrete is suggested. The only parameter needed to run the model is the ultimate compressive strength of the concrete. The model was deduced by considering the average values of series of test results obtained for specimens tested under various conditions. It provided a good prediction of experimental results available in the literature. When compared with other models, it gave better predictions. (A)