Dear Clemens @karamba3d
As your request i open a new topic about the NB_RD values.
01_SimpleBeam_cp-Jac.gh (41.3 KB)
On this example i applied a unique point load who generate uniform compression along the beam
My result below :
I dont find the same NB_RD values as yours
As you, i find χ yy = 0.9144 and χ zz = 0.7204
But for Nb.rd i find :
N b.rd.yy = 0,9144 * (45.25cm210^-4) * (235MPa10^6)/1000 ) / 1 (γM0) = 972 kN
N b.rd.zz = 0,7204 * (45.25cm210^-4) * (235MPa10^6)/1000 ) / 1 (γM0) = 766 kN
When Karamba give me NB_RD = 1063 kN
I misunderstood something ?
Also, the Az values in cross section components was 9.69cm2, i find 14.47 cm2 (Avz = A - 2.btf + (tw+2.r)*tf)
Thanks for your help.