Abstract
The steel–concrete interface is an important component of reinforced concrete (RC) materials, and accurately expressing the mechanical properties of the interface is crucial to the failure analysis of RC members. The unique superiorities of peridynamic (PD) theory in dealing with discontinuities make it extensively applied in the failure analysis of RC structures. This paper introduces a modified PD model for describing the mechanical behavior of the steel–concrete interface. The ideal microplastic PD model and bilinear PD model are applied to express the mechanical behavior of steel and concrete respectively. Furthermore, the strain rate effect of materials is also incorporated in the analysis of dynamic damage to RC members subjected to blast load. A parallel (OpenMP) program was developed using FORTRAN to implement the computation of the modified PD model. Finally, the modified PD model was utilized for the numerical simulation of the RC beam shear-flexural failure experiment and the RC slab explosion failure experiment. Research shows that the modified PD model can correctly describe the mechanical behavior of the steel–concrete interface.
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