Aerodynamic Studies for Standardized Pressure Maps on Double-Curved Freestanding Membrane Roof Canopies
摘要
TheCanopy fast construction and material efficiency of lightweight textile structures make them an ideal solution for a wide range of situations, from building roofs to provisional or permanent structures in public spaces. However, their lightness also makes them vulnerable to wind loadsWind loads. Despite the increasing usage of such structures, there is still a lack of standardized wind loading to consider for their design. This makes it necessary to assess specific geometries case by case. The present study investigates three representative shapes (hypar, arch-supported, and ridge-valley), in an effort toward a standardized guide to design membrane roof canopiesCanopy subjected to wind loadsWind loads. The study makes use of an extensive numerical simulation campaign employing a formulation of the flow based on the finite element method (FEM), implying a large eddy simulationLarge Eddy Simulation (LES) (LES) approach for modeling turbulenceTurbulence. The respective shapes are assumed to be completely rigid and are tested as freestanding structures. Additionally, a steady atmospheric boundary layer wind conditionWind conditions for an open terrain is applied at the inlet. This serves as a starting point for further studies with turbulent inlet. Mean pressure and standard deviation maps of the pressure coefficientPressure coefficients for the baseline shapes for various angles of incoming wind are presented. The deviations due to changes in aspect ratio or configuration are also shown, indicating potential for parameterized pressure maps. The results show a promising initial step toward standardizing the pressure maps for these freestanding membrane roof canopiesCanopy.