Midas FEA embedded reinforcement modeling represents reinforcing bars or grids inside host finite elements so reinforced concrete behavior can be modeled without requiring every reinforcement line to match the host mesh topology.
How It Works
The manual separates rebar bar elements and rebar grid elements, then describes their finite element formulation and their use inside plane strain, axisymmetric, plane stress, solid, and plate elements. Prestress context is also included, so the reinforcement thread is tied to both element formulation and staged concrete analysis.
In implementation terms, embedded reinforcement is a coupling problem. Reinforcement strain is obtained from host-element kinematics or mapped coordinates, the reinforcement constitutive response contributes stiffness and internal force, and the contribution is assembled into the host/global degrees of freedom.
Solver Development Notes
Define whether reinforcement has independent DOFs or is fully embedded in host interpolation.
Store reinforcement orientation, area, material, prestress data, and host-element mapping explicitly.
Include tests for mesh-independent reinforcement placement and for reinforcement crossing host element boundaries.
Verify reinforcement response with displacement, reaction, element force, and stress comparison against a reference solver.
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