  In this paper, a modified intermediately homogenized peridynamic (IH-PD)
model for analyzing impact failure of wet concrete has been presented under the
configuration of ordinary state-based peridynamic theory. The meso-structural
properties of concrete are linked to the macroscopic mechanical behavior in the
IH-PD model, where the heterogeneity of concrete is taken into account, and the
calculation cost does not increase. Simultaneously, the porosity of concrete is
considered, which is implemented by deleting the bond between two material
points, as well as the influence of porosity on the mechanical properties of
concrete. Moreover, the effective bulk and shear modulus of cement mortar in
wet concrete (saturated and unsaturated concrete) are calculated respectively.
The dynamic model for wet concrete is described from three aspects: strength,
dynamic increase factor, and equation of state. Validation of the proposed
model is established through analyzing some benchmark tests and comparing with
the corresponding experiment and other available numerical results.
