Dear Communities,I would like to model the element STF in the figure as a stiffness element (as link element in other Softwares SAP, ETABS)Can anyone give me some idea to solve the problem?Thanks in advance.
Thanh,
Are you trying to model linear stiffness for all degrees of freedom? You can manually define a superelement or use a SACS model to generate a superelement using the Superelement program. I would recommend reading the Superelement for more details on how to create a superelement input file. You can enable superelement input in you model file with Options > Analysis > Input super-element.
Axial non-linear elements can be defined using Gap elements. See the Gap element manual for more information about Tension/Compression elements and Force-Deflection elements.
If you want to model more degrees of freedom for non-linear elements, you can use Non-Linear Joint-To-Joint Springs in Collapse to model non-linear stiffness curves for each local degree of freedom for the element.
Let me know if you need more information or resources on any of these solutions.
Regards,
Geoff