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SAP 2000_Link with different stiffness for tension and compression

SAP 2000_Link with different stiffness for tension and compression

SAP 2000_Link with different stiffness for tension and compression

(OP)
Hello everyone,

I am trying to model a link in SAP 2000 (nonlinear analysis), but I need the links to have different stiffness values in compression and tension.
Is this possible in SAP2000? I would appreciate your help very much.

Regards
Josie

RE: SAP 2000_Link with different stiffness for tension and compression

You might use a gap and a hook with their respective stifness.

RE: SAP 2000_Link with different stiffness for tension and compression

(OP)
Thank you very much for reply. I will give it a try.

RE: SAP 2000_Link with different stiffness for tension and compression

PicoStruc's approach is valid, but it gives you two separate output link items to review. An easier modeling approach would be to Define a multi-linear plastic link that has different Force-Deformation curve values in each direction

RE: SAP 2000_Link with different stiffness for tension and compression

I agree with PicoStruc, that is the most convenient way to do this.

Analysis and Design of arbitrary cross sections
Reinforcement design to all major codes
Moment Curvature analysis

http://www.engissol.com/cross-section-analysis-des...

RE: SAP 2000_Link with different stiffness for tension and compression

Use the multi-linear plastic link.  

RE: SAP 2000_Link with different stiffness for tension and compression

josie007, as you can see there are many alternatives, but the easier is to use gap/hook elements. However, you can use multi-linear plastic link (this is generally not recommended but may be useful to you).

Regards.

Analysis and Design of arbitrary cross sections
Reinforcement design to all major codes
Moment Curvature analysis

http://www.engissol.com/cross-section-analysis-des...

RE: SAP 2000_Link with different stiffness for tension and compression

johnbridge, please enlighten us as to the technical justification as to why the multi-linear plastic link is "not recommended", when gap and hook modeling approaches forces the user to define TWO links instead of one and sort through two links in the output instead of one? Whereas multilinear plastic link is just one link (easier) to deal with.

RE: SAP 2000_Link with different stiffness for tension and compression

josie007, use gap and hook elements as PicoStruc also suggest.

Analysis and Design of arbitrary cross sections
Reinforcement design to all major codes
Moment Curvature analysis

http://www.engissol.com/cross-section-analysis-des...

RE: SAP 2000_Link with different stiffness for tension and compression

Both method works without problem,

The hook/gap method work with basic/plus license while, the non-linear link require Advance license ($$$).

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