Search found 49 matches

by salehi
Thu Apr 14, 2016 9:08 pm
Forum: Framework
Topic: Maximum Number of Integration Points
Replies: 4
Views: 2441

Re: Maximum Number of Integration Points

Linguan:

Yes, it makes difference for our element, which uses gradient nonlocal theories to provide objective responses for the softening part. You may find it here, if interested:

http://0-ascelibrary.org.libraries.colo ... 89.0001083
by salehi
Wed Dec 23, 2015 11:15 pm
Forum: Framework
Topic: Recorder doesnt record force in spring
Replies: 4
Views: 2267

Re: Recorder doesnt record force in spring

Sometimes OpenSees does not complete printing the .out files before you close the program. Instead of closing the program, you may also give a try to the command "wipe" at the end of your .tcl file. If your .out files are of the zero size, it means that either the element for which you are recording...
by salehi
Wed Dec 23, 2015 11:06 pm
Forum: Framework
Topic: Maximum Number of Integration Points
Replies: 4
Views: 2441

Re: Maximum Number of Integration Points

Hello Dr. McKenna, Thanks for your quick reply. It is a force-based beam element that I have developed and it uses the OpenSees beamIntegration classes. Actually, I could resolve this problem myself. For those who may encounter similar issue, looking at some of the beamIntegration classes, I found o...
by salehi
Tue Dec 22, 2015 8:52 am
Forum: Framework
Topic: Maximum Number of Integration Points
Replies: 4
Views: 2441

Maximum Number of Integration Points

Hello everyone, I have developed a force-based beam-column element which needs large number of integration points to yield objective response. When I use more than 20 integration points, however, OpenSees stops working, without displaying any error. May I possibly know what should be modified, pleas...
by salehi
Sat Sep 26, 2015 3:16 pm
Forum: Framework
Topic: Large Trial Displacement
Replies: 3
Views: 1920

Re: Large Trial Displacement

I found out what the problem was and solved it... the problem was existence of a number of gap elements in the model which were of very large stiffness; these elements would cause the numerical solution mess up. I reduced those elements' stiffness value and now there is no problem in terms of trial ...
by salehi
Fri Sep 25, 2015 1:37 pm
Forum: OpenSees.exe Users
Topic: Zero-Length Section and Multi-Support Excitation
Replies: 5
Views: 2566

Re: Zero-Length Section and Multi-Support Excitation

Whenever you use imposedMotion, you need to use "Transformation" type of constraints, otherwise you won't get any result. I hope it helps.
by salehi
Fri Sep 25, 2015 11:25 am
Forum: Framework
Topic: Large Trial Displacement
Replies: 3
Views: 1920

Re: Large Trial Displacement

Thanks for your reply, it gave me an insight into the potential issue, but my model is correct and its axial strength is way larger to be yielded at the start of lateral loads' application. Now I am trying another model which is more complex and comprises my own implemented element, which is a force...
by salehi
Fri Sep 18, 2015 10:21 am
Forum: Framework
Topic: libifport.lib
Replies: 3
Views: 2559

Re: libifport.lib

Now I am using the version 2.2.2 and it does not have those problems. You may download it from http://opensees.berkeley.edu/OpenSees/d ... wnload.php
by salehi
Wed Sep 16, 2015 6:23 pm
Forum: Framework
Topic: Latest stable source code of OpenSees
Replies: 1
Views: 1372

Re: Latest stable source code of OpenSees

I have the same problem with that page... one option is using the free software called TortoiseSVN and downloading the updated files to your desired folder, as instructed in https://www.youtube.com/watch?v=BaxFLF6A8Rg
by salehi
Wed Sep 16, 2015 6:18 pm
Forum: Framework
Topic: How to Get Eigen Values and Eigen Vectors of a Matrix?
Replies: 1
Views: 1250

Re: How to Get Eigen Values and Eigen Vectors of a Matrix?

I found out how to do this... for those who may concern, you need to modify the FullGenEigenSolver class or similar EigenSolver classes to get a Matrix object without calling analysis classes and needing Graph objects to set the size given to the EigenSolver; you also need to utilize a couple of fun...
by salehi
Tue Sep 15, 2015 1:53 pm
Forum: Framework
Topic: How to Get Eigen Values and Eigen Vectors of a Matrix?
Replies: 1
Views: 1250

How to Get Eigen Values and Eigen Vectors of a Matrix?

Hello everyone, I am working on an element in whose formulation I need to determine the eigenvalues and the eigenvectors of a matrix... could anybody let me know how I may do eigen analysis in OpenSees? I tried using the following lines, but I could not set the size for theEigenSOE object: static Ba...
by salehi
Mon Sep 14, 2015 2:45 pm
Forum: Framework
Topic: Large Trial Displacement
Replies: 3
Views: 1920

Large Trial Displacement

Hello Frank, I have developed a force-based finite-length joint element and built a whole OpenSees project having it implemented in. In order to verify the element's response, I am trying to perform a displacement-control pushover analysis on a model including only my element as a cantilever beam-co...
by salehi
Sat Sep 12, 2015 11:18 am
Forum: Framework
Topic: Matrix::Solve for dll Projects
Replies: 2
Views: 1431

Re: Matrix::Solve for dll Projects

Thanks Frank, I tried building the whole OpenSees project and it worked after resolving some errors. By the way, I could not download the zip file of the new version and I had to build the 2.2.2 version; is this version fine? I tried to get the newest files from SVN using TortoiseSVN, but I faced to...
by salehi
Sun Sep 06, 2015 4:47 pm
Forum: Framework
Topic: Matrix::Solve for windows dll
Replies: 4
Views: 2537

Re: Matrix::Solve for windows dll

I have the same problem, too... Could you let me know if you have found a solution for this? Thanks!
by salehi
Sun Sep 06, 2015 4:40 pm
Forum: Framework
Topic: Matrix::Solve for dll Projects
Replies: 2
Views: 1431

Matrix::Solve for dll Projects

Hello everyone, I have written a C++ code for an element which needs the function Matrix::Solve to multiply the inverse of a matrix by a vector in its formulation. Now I have managed to make the dll file, but when I try to run an example model, I get this error which says this function is not implem...