4.16.13. Bidirectional Section

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