Comparative study on compressive constitutive models of ultra-high ductility engineered cementitious composites

Ultra-high Ductility Engineered Cementitious Composites (ECC), a class of ultra-high ductility cement-based concrete materials, are fiber-reinforced composites systematically engineered through micro-mechanical principles to achieve exceptional strain capacity under both tensile and shear loading conditions. ECC materials have been extensively implemented in civil engineering applications due to the ultra-high ductility and crack resistance. In order to meet the needs of actual engineering appliances, it is necessary and crucial to develop and apply macroscopic constitutive models with high efficiency to predict the mechanical behavior of ECC. Consequently, this paper selects several existing compressive constitutive models of ECC and evaluates the performance of these models. All the selected models are empirical and phenomenological models which are established to describe the macro-mechanical properties of ECC for the convenience of practical engineering. It can be concluded that Model I in this study produces more accurate predictions compared to other existing models based on the collected experimental results.