engleski

Numerical modelling of reinforcing concrete structures by finite-discrete element method

In this paper 2D and 3D numerical modelling of reinforcing concrete structures is presented. This model is based on the finite-discrete element method. This approach considers the structure as a deformable continuum until the opening of the cracks. The transition from the continuum to the discontinuum is a result of the fracture and fragmentation which are realized by contact elements implemented within the finite element mesh. The interaction between discrete elements is considered through the contact interaction algorithm based on the principle of potential contact forces which are computed using penalty function method. The non-linear behaviour of the concrete in tension and shear takes into account strain-hardening, strain-softening and cyclic behaviour during dynamic loading. The model of reinforcement is based on an approximation of the experimental curves for the bar strain in the crack. The presented numerical model includes interaction effects between reinforcement and concrete as well as cyclic behaviour of concrete and steel during dynamic loading.

Reinforcing concrete structures; Finite-discrete element method; Cyclic behaviour

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