4.16.13. Bidirectional SectionΒΆ

section('Bidirectional', secTag, E_mod, Fy, Hiso, Hkin, code1='Vy', code2='P')

This command allows the user to construct a Bidirectional section, which is a stress-resultant plasticity model of two coupled forces. The yield surface is circular and there is combined isotropic and kinematic hardening.

secTag (int)

unique section tag

E_mod (float)

elastic modulus

Fy (float)

yield force

Hiso (float)

isotropic hardening modulus

Hkin (float)

kinematic hardening modulus

code1 (str)

section force code for direction 1 (optional)

code2 (str)

section force code for direction 2 (optional)

One of the following section code may be used:

  • 'P' Axial force-deformation

  • 'Mz' Moment-curvature about section local z-axis

  • 'Vy' Shear force-deformation along section local y-axis

  • 'My' Moment-curvature about section local y-axis

  • 'Vz' Shear force-deformation along section local z-axis

  • 'T' Torsion Force-Deformation