Pushover analysis in SAP2000

[angelvoice3687]

I am trying to do a pushover analysis in SAP for an octagonal prestressed concrete pile. I've already modeled the pile as a winkler beam with the soil springs modeling the soil behavior. I am just unsure how to go about doing the pushover analysis at this point. Do I need to incorporate the axial force as well as a lateral force? Also, most tutorials I have found online say that I need to assign hinges to each element, do I actually have to do that?

I don't know the exact lateral forces but I do know the plastic moment, limiting values for the strain in the concrete and steel, as well as the limiting value for the plastic rotation, all from the moment-curvature analysis.

I'm trying to find where the in-ground plastic hinge occurs.

 

[TLycan]

The axial force is essential to incorporate the the 2nd effect, since you are already performing non-linear analysis.
for the point of assigning hinges I don't know any other way the SAP can take the effect of plastic hinges except by assigning frame hinge.

 

[johnbridge231]

The pushover analysis will only affect the spring forces, which will be zero in case of occurred tension. The axial force can also be introduced to the analysis, as it will affect in some way the slenderness of the pile. So I would say that it is not about a pure pushover case, than a nonlinear analysis.

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

http://www.engissol.com/cross-section-analysis-design.html