5. C modeling

5.1. Characteristics of modeling

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**DDL**of rotation**at the**knots**common**between the columns and the floors (node/plane relaxation) . **

5.2. Characteristics of the mesh

The mesh contains approximately 2600 stitches and 2700 knots (not including the sole). The mesh is that of the.

5.3. Tested sizes and results

The first three natural frequencies are calculated from modal analysis. A simple non-regression test is done.

5.4. notes

Relaxation causes a slight change in the natural frequency values.