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zhuminjie / OpenSeesPyDoc

OpenSeesPy Documentation
http://openseespydoc.readthedocs.io
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Section DOF for sectionForce #24

Closed frqc closed 5 years ago

frqc commented 5 years ago

When I'm using sectionForce, I notice that the force is return at given dof of section, which nowhere can I find its definition.

I'm using a system with ndf=6 and sections are created with fiber section to simulate a W or a box sections. I am expecting the dof of section to be 1 to 6, but the script fails when section dof is more than 4.

To get the expected result (axial force, two shear forces, two moments and one torsion), how to define the section and how to use sectionForce correctly? And what's the meaning of the returned values considering its order?

Thanks!

zhuminjie commented 5 years ago

When you set ndf=6 with model command, it sets the nodal ndf = 6. The ndf for section depends on the section you use. It seems you use a fiber section in 3D problem? For fiber 3D section, there are 4 section forces (P, Mz, My, T). If you want shear forces, you should use ND fiber section, which has 6 section forces (P, Mz, My, Vy, Vz, T). Thank you for pointing out, I will add to the document.

frqc commented 5 years ago

Thanks!