Pushover Analysis - Performance Point?

[KaneArch]

Hello, I’m a student minoring in Architectural Engineering.
Recently, I came across a concept in Structural Engineering called "Pushover," and I’ve developed an interest in learning more about it through self-study.
While there are many aspects I struggle to understand, the one I’m most curious about is the "Performance Point."
What is this point used for? What insights can I gain from this value?

I apologize if my question seems vague due to my self-study approach, but I would greatly appreciate your guidance...
Thank you!

 

[dik]

I think pushover is the same as the old term 'shakedown'. Plastic design is a manner of designing steel structures that are 'rigidly' connected. That is, the beams can develop significant moments at the column connections, often equal to the moment capacity of the beam. The concept is getting into pretty serious plastic design and is not for the normal engineer. I first encountered it over 50 years back.

This occurs when a continuous steel (and maybe concrete) structure is deformed plastically and is unloaded. The next time the structure is loaded to the same values, it behaves elastically. This is due to the residual elastic stresses that resulted from the initial overloading. Once a structure is deformed plastically (and remains standing) and is unloaded, subsequent loading will be elastic due to the residual stresses. A few engineers may not be aware of this, or maybe haven't thought about this.

A subsequent loading of different nature may produce stresses that when combined with the residual stresses may cause a premature failure; this is the shakedown load. I hope I've explained it so that it's understood. It's one of the more difficult areas of plastic design.