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