Construction of a Jo&Joe Hotel Building in Gentilly, France
This project represents a major technical challenge for the company Le Bras Frères, of which the new team embodies an internal generational shift highlighted by a significant desire to increase skills and productivity through new investments (acquisition of a size K2i machine, extension of production facilities, etc.).
|Architect||Jean-Paul Viguier and Associates|
Le Bras Frères
|Timber structure and façade||Le Bras Frères|
This project was conducted on behalf of the ACCOR HOTELS hotel group, consisting of the construction of a JO&JOE Hotel building located in Gentilly in the southern region of Paris, France.
This construction project contains the features as described below:
- A completely concrete basement
- A ground floor made of concrete
- Second through eighth floors featuring a timber outline with concrete cores
The timber frame construction covers the following elements:
- CLT panels shaping façade walls
- CLT panels shaping interior walls
- LC timber columns
- LVL backing columns
- LC timber beams and lintels
- Steel beams
- Metal angles supporting the openings
- CLT panels shaping the floors
- COFRADAL floor
- Various achievements
The façades are covered with a liner tray-type metal cladding made of thin metal sheet. The use of spacers composed of metal angles, mechanically attached to the plates or the shell supports, allows three-dimensional adjustment.
The slats are fastened to metal rails and the thermal insulation is mechanically ensured thanks to spacers.
A 3D model of the timber structure and the steel beams was generated to lower the loads on the shell (concrete cores and walls). The rest of the analysis focused on the design check of the CLT floors. The outlining of the layer structure of the CLT panels from the manufacturer (Egoin) and the design of the panels were performed by the RF-LAMINATE module, which integrates a wide range of CLT panel suppliers.
Each floor level is supported on the edges by CLT walls. The floors in the public areas of the hotel are supported by timber and steel beams. The design of the timber beams as well as their fire resistance were carried out with the RF-TIMBER Pro module according to Eurocode 5. The steel beams were designed according to the same principle based on Eurocode 3, relying on the RF-STEEL EC3 module.
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In this article, the adequacy of a 2x4 dimension lumber subject to combined bi-axial bending and axial compression is verified using RF-/TIMBER AWC add-on module. The beam-column properties and loading are based on example E1.8 of AWC Structural Wood Design Examples 2015/2018.
Interior Perspective of a Single Story of the Jo&Joe Hotel Building in Gentilly, France (© Le Bras Frères)
Detailed Perspective of the CLT Floors of the Jo&Joe Hotel Buiding in Gentilly, France (© Le Bras Frères)
Compared to the RF-/TIMBER Pro add-on module (RFEM 5/RSTAB 8), the following new features have been added to the Timber Design add-on for RFEM 6/RSTAB 9:
- In addition to Eurocode 5, other international standards are integrated (SIA 265, ANSI/AWC NDS, CSA 086, GB 50005)
- Design of compression perpendicular to grain (support pressure)
- Implementation of eigenvalue solver for determining the critical moment for lateral-torsional buckling (only EC 5)
- Definition of different effective lengths for design at normal temperature and fire resistance design
- Evaluation of stresses via unit stresses (FEA)
- Optimized stability analyses for tapered members
- Unification of the materials for all national annexes (only one "EN" standard is now available in the material library for a better overview)
- Display of cross-section weakenings directly in the rendering
- Output of the used design check formulas (including a reference to the used equation from the standard)
- Where can I find the materials for the corresponding National Annexes in RFEM 6 and RSTAB 9?
- How does the "Orthotropic Plastic" material model work in RFEM?
- What is the meaning of the superposition according to the CQC rule in a dynamic analysis??
- Can I use RFEM to calculate a log house three-dimensionally?
- How do I display some results of all load cases in the printout report, but other results of the selected load cases only?
- Can I design laminated veneer lumber with RFEM/RSTAB?
- I would like to carry out the flexural buckling design for timber components with imperfections and internal forces according to the second-order analysis. Is it sufficient to activate this in Details of the RF‑/TIMBER Pro add-on module or is it necessary to make additional settings?
- How can I calculate a timber-concrete composite floor with cross-laminated timber?
- Is it possible to save the structures of the manufacturer-specific cross-laminated timber plates in the RF‑LAMINATE add-on module?
- How is it possible to display the main support direction graphically in RF‑LAMINATE?