3.1.7.10. BidirectionalSection

This command constructs a bidirectional elastoplastic section model with combined isotropic and kinematic hardening. The command name in OpenSees is Bidirectional.

section Bidirectional $secTag $E $sigY $Hiso $Hkin <$code1 $code2>

Argument	Type	Description
$secTag	integer	unique section tag
$E	float	elastic modulus
$sigY	float	yield stress
$Hiso	float	isotropic hardening modulus
$Hkin	float	kinematic hardening modulus
$code1 $code2	string	optional section response components (default Vy and P)

Valid response codes are P, Mz, My, Vy, Vz, and T.

Example

1. Tcl Code

section Bidirectional 1 1000.0 10.0 0.0 100.0 Vy P

2. Python Code

ops.section('Bidirectional', 1, 1000.0, 10.0, 0.0, 100.0, 'Vy', 'P')

Code Developed by: Michael H. Scott