Openseespy.basicForce(ele) returns [axial, moment1, moment2] require [axial, shear, moment]?
Hey,
It returns, Axial force followed by moments at each end.
S
Hi Sean,
Thank you for replying looks like I needed the ‘sectionForce(ele)’ function it’s buried in the docs so I didn’t know it existed.
T
No worries…don’t get me started on the docs 
Seán
Hello,
I am not sure where best to post my question.
Does anyone know how to specify an axial spring stiffness constant in OpenSEESPY? I have not been successful with the command axialElasticSlope.
For example, I am interested in the snap through analysis of a Von Mises truss with an axial spring fixed to the apex at one end and supporting a constant force at the other end of the spring.
Merry Christmas
Hey @uk086287, this is the right place to post…welcome.
Generally, you can expect more help with questions that are directly related to something we’ve covered in a course or tutorial - although it’s never any harm posting general questions like yours.
I’m afraid I can’t offer you any direct solutions - I’ve not tackled a case like yours in OpenSeesPy. Having said that, I wonder have you tried simplifying your problem to a minimal viable case that simply tests the implementation of spring element? That would be my first step - then, once I was comfortable that I was correctly modelling a linear spring, I’d start to build back up to the original problem.
Another thought that comes to mind is simply using a regular element with a uniaxialMaterial with a sufficiently small stiffness to mimic a spring.
I’d be interested in hearing more on this - please feel free to post more details (and what eventually works!)
Seán