Recreational Area Tension Membrane Structure in Châteauneuf-de-Galaure, France
The engineering company ACS provided the full project structural analysis and design including the fabric membrane and frame structure.
|Investor||O.G.E.C Châteauneuf - Saint-Bonnet, Châteauneuf-de-Galaure, Frankreich|
H2C Architecture, Lyon, France
|Structural Analysis||AC Structures, Rennes, France|
ICM, Marseille, France
ACS Production, Montoir de Bretagne, France
The covered recreational area consists of 6 frames with steel tube columns and welded galvanized steel I-beams covered with a double-curvature PVC membrane. The roof spans over the Foyer de Charité de Châteauneuf-de-Galaure, Drôme department school grounds.
A channel system integrated into the welded I-beams and downpipes integrated into the columns allow for unobtrusive rainwater drainage and improved aesthetic appeal.
For the structural design, the following Dlubal Software programs were utilized: RF-STEEL EC3 add-on module for the calculation of the steel supporting structure, the RF-FORM-FINDING add-on module to determine the fabric membrane shape and determine the membrane ultimate limit state, and the RF-CUTTING-PATTERN add-on module to create the fabric cutting pattern geometry.
To begin, a general structural analysis model including the steel frame and membrane was created. The supporting steel structure was further designed taking into consideration the fabric membrane forces. Additionally, the fabric analysis and design were also carried out for the overall structure design.
In the second phase, the roof panels were separated and the fabric stress curves and changing curvatures were checked. A second, more accurate and detailed model was developed.
The modeling phases alternated with the design phases to consider the interaction of the fabric and frame.
Project Location85 Rue Geoffroy de Moirans,
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RF-/PLATE-BUCKLING Add-on Module for RFEM/RSTAB | Plate Buckling Analysis for Plates with or Without Stiffeners According to 1993-1-5
RFEM/RSTAB Add-on Module RF-IMP/RSIMP | Generation of Geometric Replacement Imperfections and Pre-deformed Replacement Structures
Extension of the RF-/STEEL Warping Erosion module | Lateral -torsional buckling analyzes of members according to the second -order theory with 7 degrees of freedom
RFEM/RSTAB add-on module RF-/TOWER effective lengths | Determination of effective lengths of lattice towers
RFEM/RSTAB add-on module RF-/JOINTS Steel-Column Base | Hinged and restrained column bases according to EC 3
SHAPE-THIN determines the effective cross-sections according to EN 1993-1-3 and EN 1993-1-5 for cold-formed sections. You can optionally check the geometric conditions for the applicability of the standard specified in EN 1993‑1‑3, Section 5.2.
The effects of local plate buckling are considered according to the method of reduced widths and the possible buckling of stiffeners (instability) is considered for stiffened sections according to EN 1993-1-3, Section 5.5.
As an option, you can perform an iterative calculation to optimize the effective cross-section.
You can display the effective cross-sections graphically.
Read more about designing cold-formed sections with SHAPE-THIN and RF-/STEEL Cold-Formed Sections in this technical article: Design of a Thin-Walled, Cold-Formed C-Section According to EN 1993-1-3.
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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
Form-finding of tensile membrane and cable structures
Generation of cutting patterns for tensile membrane structures
Design of steel members according to Eurocode 3