Regarding adaptive pushover analysis

[mangesh30]

Dear all,
I am a little bit confusing on force-based and displacement-based adaptive pushover analysis . My question is if I want to run displacement adaptive pushover then what should be the load on each node? and another, I changed the magnitude of an applied force then capacity will get same how it is possible? would you please explain, please?

[seismosoft]

In displacement-based pushover the loads are indeed displacement and their scaling should be done according to a displacement response spectrum.
Not sure what you mean with your second question though. Can you please explain ti a bit further?
Seismosoft Support

[mangesh30]

what is the magnitude of displacement load or force load is it 1 mm or 2 mm...... how to decide magnitude of load?

[seismosoft]

It depends on the strength and the ductility of your structure. The rule of the thumb is that you need to push to a displacement, so that to reach the plastic branch of the capacity curve, i.e. after the building yield displacement. However, different types of buildings have different yield displacements. For instance for existing RC buildings a limit of 0.5%-1.0% of the total building height should be enough.
Seismosoft Support

[mangesh30]

But the magnitude of displacement? Is it 1 mm or 2 mm by using this can we push the building?

[huffte]

Try to push to 10 mm, just for an example. If you observe no inelastic behavior in the resulting hysteretic plots, the run again and try to push to 20 mm. If the building fails before it gets to 10 mm, then either you are finished and have identified the limit state of collapse. Or, you could run again at a smaller target displacement - say 7 mm. Some hand calculations up front would help you estimate the yield displacement. But even if you cannot do the up-front calculations, then a trial and error procedure should get eventually zeroed in on the behavior you wish to model.

[mangesh30]

I am asking about the magnitude of applied displacement on building not controlled displacement..

[mangesh30]

Anyone can give me a detailed explanation on my question?

[seismosoft]

In Response Control the way that the structure is pushed is determined by the displacement steps of the control node (determined in the Phases module). In such case what matters in the definition of the loads is only the relative value of the loads (forces or displacements), because everything is multiplied by an appropriate Loading Factor so that to achieve the predetermined displacement levels of the control node.
Refer to the help of the program to understand how Response Control works.
Seismosoft Support

[mangesh30]

I got the concept of controlled displacement but can we push building with displacement magnitude also? Is it possible if we don't know the force on the building then what should be the magnitude of applied displacement load or how can we decide the magnitude of displacement load?