Comparison of Strength Criteria Based on the Measurements on Concrete

Abstract

To evaluate an arbitrary multiaxial stress state, the concept of the equivalent stress can be used. Because of its simplicity and clarity, this concept is now widely used in the component design. Many strength criteria based on the equivalent stress concept have been formulated during the last two centuries. Currently, a large number of strength criteria are available. The choice of an appropriate criterion for a particular material is the main challenge in applications. The alternative is the formulation of generalized criteria that contain classical strength hypotheses and are suitable for different materials. The generalized criteria of specific studies are selected in this work to describe experimental data for concrete. The generalized strength criteria contain several material parameters. The application of these criteria requires experimental results under multiaxial stress states in addition to tension, compression, and torsion test data. As an example, experimental data for concrete under plane stress loading are the focus of this study. These data are approximated with the help of the chosen criteria. The recommendations for the application of the generalized criteria are provided.