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I am running some large models with large node numbers. The problem I am running into is with the "print" command. If I run the command "print model.txt" the model.txt file contains: Node: 2.0101e+006 Coordinates : 10.8 156 ... Node: 2.0101e+006 Coordinates : 180 156 ... so there...

Upon further investigation, it seems that if you want the "sharpness" in the initial stiffness, you also need the sharpness in the higher displacement cycles. http://imgur.com/a/402Ac The above image has the same parameters listed in the paper with the exception of the alpha+ (alpha_T) val...

The initial stiffness of the SteelBRB material seems to be incorrect. See image here: http://imgur.com/a/7FDdQ The black is from the curve published in "Elastoplastic model for steel buckling restrained braces" (Alessandro Zona, Andrea Dall'Asta, 2012) and the red is the OpenSees output wi...

For Windows a decent program for tcl editing is Notepad++ (https://notepad-plus-plus.org/). It's almost certainly not as sophisticated as the application you used for C++, but it does have syntax highlighting that will help you interpret your code better or see where you made mistakes.

vesna wrote: > If specified, mass density will be used to calculate translational lumped > masses at the element ends. However, this option is not working properly at > the moment. I would suggest you not to use it until the problem is > resolved. Specify masses directly using mass command. Was this...

Is there a reason that the 2-norm is default over another type of norm?

Unfortunately, my model is fairly complex and does have EqualDOF constraints... Based on the wiki page for NormUnbalance, the convergance test is comparing the norm of the "right hand side of the matrix equation" which "Usually, though not always, it is equal to the unbalanced forces ...

Thanks for the reply. Is there a way to check the unbalance at a node (while employing modal damping)? Or is it just assumed that using an unbalance test (i.e. NormUnbalance) will result in no unwanted force unbalance? I did come across the 'unbalance' option for the node recorder, but I can't find ...

Upon further investigation, it appears that the discrepancy is equal to the base acceleration times the mass at the node. I will give a brief explanation of what I think is going on, and if someone could confirm this or tell me where I am mistaken that would be great. Considering the equation of mot...

I was using the 2D cantilever example (Ex1a.Canti2D.EQ.modif.tcl with A10000.tcl ground-motion file) to investigate the node reaction recorder and I can't figure out what the recorder is outputting for the top node. Looking through the forum, my understanding is that the node reaction is the sum of ...

I'm not sure if this is the right board to post this question to, but anyway... I'm having trouble understanding what exactly the integration weights represent in Force-Based Beam-Column Elements. If I use "Lobatto $secTag $numIntgrPts" with numIntgrPts = 3, the following locations and wei...

It seems to be a compiling issue with Arch Linux. I compiled it on a CentOS machine (using the exact same files) and it works fine. I don't know how to explain it, but now that I have a working version I am no longer going to spend time troubleshooting the Arch Linux issue. Thank you for your time a...

Thanks for the reply, fmk. Unfortunately, I have tried that and it is still not working. Could somebody with a working version of the ElasticPPcpp.so please enter the following command to see if the library contains undefined symbols like mine? $ nm -D ElasticPPcpp.so The link to my results (as post...

Yes, right now I'm working with rev 6248. OpenSees builds successfully and runs models which make use of only standard features, but will not load the shared library (compiled for the same revision). I've experienced the same problem with any previous revisions that I've built as well.

Arch Linux, x86_64 with 32 and 64 bit gcc and libraries The specific error that seems to be preventing the library from loading is: dlerror() = /tmp/ElasticPPcpp.so: undefined symbol: _ZN16UniaxialMaterial11setResponseEPPKciR10OPS_Stream Doing $ nm -D ElasticPPcpp.so shows that there are a lot of un...