Dynamic Compressive Test and Rate-Dependent Constitutive Model of Microconcrete

The dynamic compressive tests of microconcrete were carried out under the strain rate of seismic action. Based on test results, the rate-dependent compressive constitutive model of microconcrete was proposed. In order to verify the accuracy and efficiency of the proposed constitutive model, the dynamic compressive tests of microconcrete were simulated by finite element software ABAQUS. Results show that the dynamic compressive strength and elastic modulus of microconcrete increase with the increasing strain rate. There was no obvious change on strain at peak stress. The compressive stress-strain curves of microconcrete were similar to concrete. The results of numerical simulation approximately agree with test results. The proposed constitutive model can simulate the dynamic compressive property of microconcrete very well.