7. Modeling E

7.1. 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**el**es**DDL of rotation on the**common edges** between**veils** and the floors (relaxation**plane**/plane) .** On the other hand, before doing this operation, we apply a rotation to the mesh of the model along the three global axes.

7.2. Characteristics of the mesh

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

7.3. Tested sizes and results

The first three natural frequencies are calculated from modal analysis. These values are compared with the results obtained with D modeling.

Frequencies	Reference values (D modeling)	Tolerance
1st natural frequency	24.7734 Hz	0.1%
2nd natural frequency	36.3761 Hz	0.1%
3rd natural frequency	65.1450 Hz	0.1%

7.4. notes

Exactly the same values as with D modeling are obtained. This method validates the writing of kinematic relationships produced by the Rtool tool tool.