Modeling E
==============

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.


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.


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.


.. csv-table::

    "**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%"



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.