# 4.16.2. Fiber Section¶

section('Fiber', secTag, '-GJ', GJ)

This command allows the user to construct a FiberSection object. Each FiberSection object is composed of Fibers, with each fiber containing a UniaxialMaterial, an area and a location (y,z). The dofs for 2D section are [P, Mz], for 3D are [P,Mz,My,T].

 secTag (int) unique section tag GJ (float) linear-elastic torsional stiffness assigned to the section
section('Fiber', secTag, '-torsion', torsionMatTag)

This command allows the user to construct a FiberSection object. Each FiberSection object is composed of Fibers, with each fiber containing a UniaxialMaterial, an area and a location (y,z). The dofs for 2D section are [P, Mz], for 3D are [P,Mz,My,T].

 secTag (int) unique section tag torsionMatTag (int) uniaxialMaterial tag assigned to the section for torsional response (can be nonlinear)

Note

1. The commands below should be called after the section command to generate all the fibers in the section.
2. The patch and layer commands can be used to generate multiple fibers in a single command.

Commands to generate all fibers: