High-Rise Building Le Haut-Bois in Grenoble, France
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
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.
Extensive CLT panel knowledge, calculation methods, and manufacturing techniques has allowed for easier design and construction of tall wood buildings today.
The residential building Haut-Bois in Grenoble is one of the first CLT building projects in France reaching a height of 99 ft. The total floor space is approximately 50590 ft².
The 9-story building structural concept is based on using 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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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