Dynamic wind load on high-rise building having unsymmetrical floor plan

[HuynhKeshley]

I am working on a high-rise building project with 200m tall; floor plan has half-circle shape with diameter = 40m.
In some codes, only high-rise building with rectangular plan is mentioned.
Could anyone tell me the way to calculate along-wind force and across-wind force for that building.
Thanks.

 

[Lomarandil]

It's my understanding that for buildings of that scale (height), wind loads are more commonly derived from wind tunnel model testing (or maybe CFD now), not prescriptive use of the codes.

 

[HuynhKeshley]

Dear Lomarandil,

Thank you. Yes, I also think that the tunnel test is needed. However, I want to do that calculation first before going to the test.
Moreover, I would like to know the way to calculate wind force for that floor plan shape with any height of building.

 

[Lomarandil]

I'm sure you could approximate some results by varying the Cd or Cf factor (drag coefficient) for various orientations.

I'm sure there are tabulated values for a semicircle geometry out there, but you might have to look into some fluid mechanics resources rather than structural engineering ones.

 

[BigInch]

Eurocode

https://www.youtube.com/watch?v=jJMo1fzUo8Y

ASCE

https://www.youtube.com/watch?v=s4biKSu9m9c

https://www.istructe.org/journal/volumes/volume-90/issues/issue-2/articles/derivation-of-wind-load