<![CDATA[Cervenka Consulting Forums — nonlinear analysis of a collumn bridge]]> https://forums.cervenka.cz/viewtopic.php?id=58 Thu, 23 Jul 2009 08:34:45 +0000 PunBB <![CDATA[Re: nonlinear analysis of a collumn bridge]]> https://forums.cervenka.cz/viewtopic.php?pid=101#p101 Dear Claudio,
I would recommend to model that using shell elements (see http://www.cervenka.cz/products/atena/f … -elements1 ; maybe with small regions of volume elements near the supports or connections). Regarding reinforcements, usually most of the bars can be modelled by smeared reinforcement and a few (+ any prestressing cables) as embedded discrete reinforcement. The analysis running time is hard to estimate as it depends not only on model size (number and type of elements), but also many other factors, nevertheless, I think for such model you can expect analysis running times in the order of hours. However, sometimes the calculation can get very lengthy if you are interested in postpeak behavior or when there are heavily damaged regions.

I think possibly even a 2D model (resp. two, as it is not neccesarily clear which of the direction is worse) may be sufficient - of course it depends on the setup and what results are needed. Even if it is not enough, it would probably make sense as a good starting point before one starts with a complicated 3D model...

You can try our software online
http://server.cervenka.cz/vtls/
or download the demo version (limited number of elements)
http://www.cervenka.cz/downloads

I assume you have already seen our bridge poster
http://www.cervenka.cz/products/atena/f … of-bridges

Please contact us when you have further questions.

]]> Thu, 23 Jul 2009 08:34:45 +0000 https://forums.cervenka.cz/viewtopic.php?pid=101#p101 <![CDATA[nonlinear analysis of a collumn bridge]]> https://forums.cervenka.cz/viewtopic.php?pid=100#p100 Dear dpryl,
I am a beginner in study of nonlinear analysis.
I work with a software (Midas Civil) that consider geometric nonlinearity (pdelta) and other with fiber analysis that consider material nonlinearity. But not combined.

I need to do a geometric and material nonlinearity analysis of a tall reinforced concrete collumn (40m) hollow box of a bridge.

Will I need model all collumn with 3d elements  and reinforcements in Atena?
And about time of processing?
Thanks
Claudio

]]> Wed, 22 Jul 2009 22:09:44 +0000 https://forums.cervenka.cz/viewtopic.php?pid=100#p100