D modeling
==============

Characteristics of modeling
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Reinforced concrete walls and floors are modelled by DKT plate elements. Reinforced concrete is modelled with a simple elastic law. Beams and columns are modeled by POU_D_E elements. These are considered elastic. The sole is modelled by 3D elements and is considered elastic.

Damping is not considered in the modeling.

**In this modeling, we release** the **es** DDL **of rotation on the** common edges **between the** sails **and the floors (relaxation** plane **/plane) .**


Characteristics of the mesh
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The mesh contains approximately 2,600 meshes and 2,700 knots (not including the sole). The mesh is that of the.


Tested sizes and results
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The first three natural frequencies are calculated from modal analysis. **A simple non-regression test is done.**


notes
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Relaxation causes a slight change in the natural frequency values.