model builder

[derogar]

hi ,


In the limit state material model "CenterCol_basicModel.tcl" in the manual, the structure was modelled as a 2D structure (which means every node has 3 DOF’s) but in the definition of zero length elements they used 6th direction which is as followed:


# Define the zero-length end springs

#bottom of column slip spring

element zeroLength 1 1 2 -mat $rigidMatTag $rigidMatTag $centerSlipTag -dir 1 2 6

#top of column springs incl shear and axial

element zeroLength 3 3 4 -mat $shearTag $axialFailTag $centerSlipTag -dir 1 2 6



My question is how it is possible to have 2D model and in mean while we have direction 6 as well. Do we need to use direction 3 instead 6.



Looking forward to hear from you very soon



Kind Regards

[silvia]

does it give you an error?

[derogar]

but in a 2d model which means it has 3 degree of freedom, we can not talk about 6th direction.
plus in my own model which is in 2d, I get error when I have zero length in 6th direction.

[silvia]

exactly. then, NO you cannot specify a dof greater than the number of degrees of freedom.

please contact the author of the example if you wish to discuss it with him directly.