Dynamic constitutive model for confined concrete based on a consideration of loading history

To objectively describe the behavior of confined concrete under high strain rates the loading history has to be taken into account. The concrete model with this character suggested by Eibl and Schmidt-Hurtienne is applied to the model of confined concrete. The uniaxial stress-strain curve with four-parts for confined concrete under compression is proposed to obtain the model term 'static damage evolution'. Based on the experimental results of concrete, the parameters to the model term 'dynamic damage delay' are derived with an iteratively numerical approach. As a result, the 'dynamic damage delay' can be determined. Examples show that the dynamic behavior of confined concrete can be predicted with the proposed approach in a proper manner.