BS EN 1991-1-4 - Wind on Concave Walls

[Jacob-William]

Hi All,

I need to find the external/internal/net wind pressure coefficients for vertical walls that are concave on plan. I would have thought intuitively that wind on such a concave wall would be subject to an increased pressure, as for continuation purposes its path after hitting the wall in the concave region could be directed inwards along the curve.

I can't find any allowances for this in either Eurocode or British standards - any helpful tips from previous experience, or reference to something in the codes would be great! (American codes also).

Many thanks,

Jacob

 

[GeorgeTheCivilEngineer]

You could treat it as a enclosed building, but without a roof I can't imagine there's much of an increase in pressure.

I've never come across this situation but I do not think I would increase loading due to a concave shape. I would instead consider the wind approaching from different directions in combination - this would maximise the cross sectional area under wind loading without worrying about fluid dynamics.