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Morning!

I checked everything and even tried different materials and still my nonlinear analysis is not as is should be...
The value of dt is related to the time of the spectrum or is arbitrary?
And why can't the base node selection not have the top nodes from the zerolength element? I'm getting ...

Is muh better!! But still very noisy and compact..
Is there any other thing that can be changed so I can get a curve more like this (non linear analysis):

Just one clarification: Is it the same model?

Is the same model I presented before.
I made it following the youtube tutorial, so connections are equal, material props very similar. Changes the geometry (shorter bridge) and the sw loads and the bearing props.

I have another question related to this topic: on my TH analysis I followed the youtube tutorial about the Non linear TH analysis of a bridge.
I have all the settings the same way as the example, but still can't have the same type of nonlinear analysis as the example.
I've checked, I am comparing ...

STKO Team wrote: ↑

Wed Jan 24, 2024 9:41 am

First do the comparison using the correct set of nodes for reactions and let's check that they match (i.e. the TH results are following the slope of the pushover).

I did this, and you're right, it matches.

What should I correct then so I can have a better analysis? Is the material properties? Is the way I'm doing the pushover?
I really need to do this analysis and compare both, inclusive the influence that the bearing system has in the bridge displacement when exposed to seismic actions.

Correct me if I'm wrong but shouldn't I get a curve similar to the one in pink?
At least is the idea I have, or have a TH analysis that follow the blue line I have.. I just saw some examples and they were matching.

This is exactly what I obtained, and if you superimpose it to the dynamic response, they will have not the same slope


Sorry, I'm confused
But I want it to be similar, to have "sure" that I'm doing the analysis well.
And with that selection set I can't even get the capacity curve..


and you ...

Sorry but your blue curve is wrong.
It comes from your pushover analysis with the old (wrong) selection set.
Please re-run the pushover (or re-extract the results from the post processor) and you will see that the pushover curve is actually much higher (same stiffness of your dynamic) because ...

Regarding the time history analysis.
It doesn't match the pushover just because in the monitor in the time history you are monitoring the SUM of the Uy displacments of all the "top nodes" [selection set 6]. You should use instead the "node control" [selection set 5]


Dear STKO team,

I did ...