AERODYNAMIC SHAPE FACTORS for BEAMS

[sdz]

AS 1170.2 Tab E5 has drag force coefficients; Cf,x andCf,y; for UB/UC type sections for d/b ratios of 0.48 and 1.0.

Does anyone have similar data for other beam sections?
Is there a general formula for coefficients for varying d/b ratio?

The following seem to fit but there are only two points to work from.
Cf,x(?=0deg)=2.5-0.9*(d/b)
Cf,y(?=90deg)=-1.9*(d/b)
where 0.0<=(d/b)<=1.0

 

[apsix]

I've got this for SHSs which is a bit more useful than the advice for SHSs in T.E3

 

[sdz]

Thanks apsix. Has anyone got something similar for beams of different aspect ratio?

 

[dik]

FYI... may be useful, has whiskers, though...

Dik

 

[sdz]

dik,
now I know where AS1170.2 gets its values from. Unfortunatley it adds no further information.

 

[dik]

The information shown in the NBCC supplement that was attached was obtained from research done in Switzerland in the late 1940's, I understand.

Dik