| Summary |
The present study investigates the characteristics of wind pressures and wind forces acting on a cylindrical free roof based on a wind tunnel experiment as well as on a CFD simulation using LES, focusing on the spatial and temporal variations. The rise/span ratio (f/B) and the length/span ratio (W/B) of the roof werechanged from 0.1 to 0.4 and from 1 to 3, respectively. In the wind tunnel experiment the wind pressure distributions were measured along only two lines because of a limitation of model making. The effects of f/Band W/Bon the distributions of wind pressure coefficient and wind force coefficient, provided by the difference between wind pressures on the top and bottom surfaces, were made clear. A CFD simulation with LES was also carried out in order to investigate the spatial and temporal variations of wind pressures and wind forces over the whole roof area. The CFD model used in the simulation was first verified by comparing the results with the experimental ones. Then, the characteristics of wind pressure and force distributions were investigated. Finally,discussion was made ofthepeak wind force coefficientsfor the design of cladding/components of cylindrical free roofs, based on the experimental and numerical results.
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