The project is in the centre of the business district of la Défense at the old Esso headquarters site.

Two offset slim towers rounded on their sides and three low buildings in the same style arise perpendicularly to la Défense, proving the façade over the square with more amplitude.

The project was constructed entirely in reinforced concrete. The wind bracing forces are mainly contained by the two cores of each of the two towers and by the tower-to-tower core. The wind stress forces were tested in a wind tunnel in Colorado.

A complete finite elements model was produced to analyse the dynamic and static behaviours of the tower.




  • Design of the towers’ structure.
  • Creation of the execution drawings of the low buildings.
  • Control of the execution drawings.


Key information

Client : TANAGRA

Design joint-venture :

  • Architect : Jean-Paul VIGUIER
  • Technical design & engineering department : setec

Main contractor : Bouygues Immobilier

Period : 1998

© Jean-Paul Viguier / Photograph Takuji Shimmura

In a Nutshell

350 000 m2total area
149mtotal height

Key figures & Main features :

  • 6 parking levels
  • 6 media structure levels
  • 40 superstructure levels
  • Office surface area: 190,000 m2
  • Total surface area of 350,000 m2.
  • Height: 149 m above the foundation slab level.
© Jean-Paul Viguier / Photograph Takuji Shimmura

A complex computational model for an ambitious project

The Coeur-Défense project represented one of the largest building projects in 1998.

The structural scope of this project required the development of a complete finite elements computational model to study the dynamic and static behaviours of the towers.

The computational complexity of the model can be appreciated by considering its size, exceeding 20,000 nodes.

© Jean-Paul Viguier / Photograph Takuji Shimmura