Numerical investigation of wind loads on an industrial shed with rounded eaves with different height-width relationships

Resumo

Pressure distributions due to wind in structures are commonly estimated using computational analysis tools as an alternative to studies carried out in wind tunnel tests, thus making it possible to study the dynamics of this fluid for various boundary conditions and geometries. That way, this work discusses the behavior of the external pressure coefficients in an industrial shed with rounded eaves, taking into account the following height-to-width ratios (H/B): h/b=0.5, /b=0.75, h/b=1.0 and h/b= 1.25. In addition, the following radius-height ratios (R/H) were also investigated for this model considering the most critical case (θ=90°; H=18.75 m): R/H=2.5%, R/H=5%, R/H=7.5%, and R/H=10%. Using Ansys Workbench software, the external pressure coefficients were obtained for wind at 45° and 90°. In the height-width ratio analysis, the results indicated that the external pressure coefficients are more intense in the 90° configuration, and the behavior of these coefficients changes between the wind directions analyzed from approximately 50% of the width of the shed. For the radius-height reduction, there was a noticeable attenuation of the suctions in the roof. Therefore, the distribution of external pressures obtained using computational methods allowed us to conclude that the effects caused by the variation in the height parameter can be, in the worst of the cases analyzed, intensified or reduced by varying the rounding radius of the eaves.