PushOver example

[Anonymous]

Hello.

I was trying to perform a simple pushover analysis in a steel frame but I have doubts regarding the definition of a vector of loading and in the process in general.  Is there an example or a tutorial on this topic.

I appreciate any help.  Thanks

Luis

[StefanoPasquini6790]

Hi, I'm also interested in this topic. Right now I run my pushover analysis with another structural design software, but I want to use Robot to do that. I've also planned to write an Excel API to define and assign the non linear hinge for rc structures members. It will be a very great thing if it's possible to have any example and it will be also very very useful if this topic will be highlighted in the forum, so that together we can find the best workflow to run pushover in robot. Tomorrow I will share the appendix of Robobat Millennium for push-over analysis, that is the same of ARSA 2018.

Cheers

[Rafacascudo]

maybe a webinar is needed??

[Rafacascudo]

maybe a webinar is needed??

[StefanoPasquini6790]

Hi everyone,

I found in my documentation this example of a push-over analysis. I've attached also the annex with theoretical assumptions and specifications.

I hope that this can help, please share your models in push-over analysis.

Cheers

[Anonymous]

Hello!

I tried the settings specified in the guides posted in a very simple model of a frame, however when I run I get an Error no. 5000.  Would you please take a look at my model and tell what is wrong.

I thank in advance any given help.

Luis

[StefanoPasquini6790]

Good Morning,

I've opened your model, why do you use rigid links also in the level with the non linear hinge? If you remove this rigid links you will see that the push will run, even if the capacity curve for displacement have a constant shape...for each point, and the story of plastizicization is empty.

It have to be investigated deeply. Could it be also very interesting to test the same model with rc structures...

Cheers

[Anonymous]

Yes, I have been trying to change the plasticity model but there is no change, the push over analysis runs, but no plastification occurs, members remain elastic.  

[Anonymous]

Robot cant do pushover for concrete buildings. It is very necessary to request this feature form AutoDesk. 

[Anonymous]

I am interested in that if ROBOT structural analysis software, define the location of the plastic hinges in steel structure?  

[aaping2]

We are interested in having some videos training how to pushover in ARSA2020, for concrete and steel

[StefanoPasquini6790]

Dear @aaping2 ,

Standing on my knowledge, to view a video on PushOver Analysis in Robot probably you have to contact Steven Spielberg or even better Christopher Nolan....

Jokes apart, Robot have a lot of lacks in Push Over Analysis that are:

MODELING

• Definition of non linear hinghes for members, it require a third party solution;
• Manual definition for all the Push Over Cases, that here in Italy it's 32 cases....
• It's impossible to define non-linear hinge for panel elements (such happens in SAP 2000)

ANALYSIS

• A lot of problems in convence of the analysis, that doesen't give the user the option to understand the point of the collapse;

POST PROCESS

• The definition of the target displacement it have to be done separately with a third party software, basing on the design code spectrum...s oit's quite complex to manage the results...

Unfortunately Push Over in Robot is an option undeveloped in last 20 years, and we keep fighting to ask the dev team to push up in this direction, because of in this last years this kind of analysis is going to became one of the most important ones for the existing buildings all over the world, basing on FEMA for the US market and Eurocode for the EU market.

[aaping2]

Gracias por su respuesta, quedo muy decepcionado con este software ARSA ,
pues es la tendencia mundial el analisis por desempeño.

[StefanoPasquini6790]

Dear @aaping2 ,

You disappoint is common for this topic, and for this all of us have to rise up our voice and ask to the dev team to run in the direction of push over analysis.

Anyway, I know perfectly Robot, I use it everyday since 2004, and I think that is a wonderfull software, for a lot of things even the best of all the market...

Cheers

[aaping2]

dear, It is one of the most powerful, but let's go to the analyses by
performance;o and we are in 2021, because that does not allow me to decide
to pay its cost..
Gracias!!