Le Haut-Bois High-Rise Building in Grenoble, France
Two 9- and 6-story residential buildings, which include 56 units in total, are the first in France to be certified passive at the height of 9 stories. They are located in seismic zone 4, in the heart of Grenoble’s Flaubert eco-neighborhood. The buildings, constructed with 52,972 ft3 of zinc-coated wood, are both an architectural masterpiece and an innovative achievement to inspire housing sustainability for the next decade.
ACTIS, Grenoble, France
Ingénierie Bois, Bischheim, France
Alpes Structures, Pontcharra, France
H.V. Conseil, Vimines, France
Atelier 17c Architecture, Barraux, France
ASP Architecture, Saint-Dié-des-Vosges, France
Extensive CLT panel knowledge, calculation methods, and manufacturing techniques have allowed for easier design and construction of tall wood buildings today.
The Haut-Bois residential building in Grenoble is one of the first CLT building projects in France to reach a height of 99 ft. The total floor space is approximately 50,590 ft².
The 9-story building structural concept is based on the use of optimized CLT panels on corresponding story heights. Therefore, the panel thicknesses decrease as the building height increases. The exterior and inner load-bearing walls provide stability to the building.
The floor diaphragms transfer the lateral seismic forces (zone 4) and wind loads to the vertical supports and eventually down to the foundations. The floors are supported by a metal and glued laminated timber post-beam system, which does not contribute to the stability of the building.
The reinforced concrete floor slabs are significant in the design, as they transfer the upper stories’ vertical and horizontal loads to the foundations.
The CLT panel and seismic analysis were carried out with Dlubal Software’s RFEM.
The following programs were used for the structural analysis:
- Structural FEA program RFEM
- The RF-DYNAM Pro module for seismic analysis
- The RF-LAMINATE module for the calculation of CLT panels and laminate surfaces
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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.
10-Story Office Building Made of Timber and Concrete | Palazzo Meridia, Nice, France | Architecture-Studio, France | www.architecture-studio.fr
The cross-section resistance design analyzes tension and compression along the grain, bending, bending and tension/compression as well as the strength in shear due to shear force.
The design of structural components at risk of buckling or lateral-torsional buckling is performed according to the Equivalent Member Method and considers the systematic axial compression, bending with and without compressive force as well as bending and tension. Deflection of inner spans and cantilevers is compared to the maximal allowable deflection.
Separate design cases allow for a flexible and stability analysis of members, sets of members, and loads.
Design-relevant parameters such as the stability analysis type, member slendernesses, and limit deflections can be freely adjusted.
- 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?
- 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?
- Can I design laminated veneer lumber with RFEM/RSTAB?
- 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?
- Is it possible to create a second design case in RF‑LAMINATE?
- I have a model of a timber building, which I have transferred from Scia Engineer and adapted it into the RFEM program. The models should be the same; however, it can only be calculated in Scia Engineer while RFEM reports singularity. How do I edit the model to analyze it in RFEM?
- How can I model a timber-concrete composite floor?
Programs Used for Structural Analysis
Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements
Deflection analysis and stress design of laminate and sandwich surfaces
Dynamic analysis of natural frequencies and mode shapes of member, surface, and solid models
Seismic and static load analysis using the multi-modal response spectrum analysis