Search found 17 matches

by motalaat
Sat Sep 29, 2007 12:10 am
Forum: OpenSees.exe Users
Topic: Internal Moment Releases at Element Nodes
Replies: 1
Views: 3052

Internal Moment Releases at Element Nodes

Hi,

Is there a capability to construct beam-column elements while specifying moment releases at one of the nodes (no rotational stiffness). If so, what is the interpreter argument to specify that.

Best,

Mohamed
by motalaat
Wed Aug 02, 2006 6:52 pm
Forum: Framework
Topic: Compiling the current version of OpenSees
Replies: 2
Views: 5232

This was very relieving to know. I'm glad I'll have the option to review what gets overwritten. Yes, I did add a few lines to some "main" interpreter files to link them to my own interpreter files. Although, btw, one of those files which gave a couple of <<<<< errors, TransformationDOF_Group.cpp, I ...
by motalaat
Wed Aug 02, 2006 5:13 pm
Forum: Framework
Topic: Compiling the current version of OpenSees
Replies: 2
Views: 5232

Compiling the current version of OpenSees

I just updated my OpenSees using CVS. I used to have an OpenSees that was compiling wonderfully on VC++6.0. Now, I ran into a ubiquitous compile-tine error. The compiler did not understand (and neither did I), the lines containing "<<<<<<<<<<SomeNunmber", or "=========SomeClassName" in files such as...
by motalaat
Wed Jul 26, 2006 5:23 pm
Forum: OpenSees.exe Users
Topic: Error Message
Replies: 0
Views: 2673

Error Message

Hi, While running an analysis using newly-developed classes, I get the error message " WARNING SuperLU::solve(void)- Error -1 returned in factorization dgstrf()". I checked the source code and found that this error is in the file SuperLU.cpp but failed to understand the condition which launches it. ...
by motalaat
Sat Nov 05, 2005 6:49 pm
Forum: Framework
Topic: TclXXFiberSectionCommand.cpp
Replies: 0
Views: 3251

TclXXFiberSectionCommand.cpp

I have written a XXFiberSection2d class [XX is a dummy] which is a modification on the existing one. The class is up and running. My question has to do with considerations of good coding. It is recommended practice that - instead of adding the required interpreter command in the original TclModel Bu...
by motalaat
Thu Oct 27, 2005 2:38 pm
Forum: Documentation
Topic: Previous versions of OS
Replies: 1
Views: 7284

Previous versions of OS

I seem to recall there used to be an option to download previous (compiled) versions of OpenSees. Is this discontinued as a policy or can I just not find it anymore? I am looking for OS versions 1.5 or older (roughly a year and a half ago).
by motalaat
Tue Sep 27, 2005 11:44 am
Forum: Framework
Topic: Comiler Link Warning
Replies: 1
Views: 4353

Comiler Link Warning

I get the following at trying to link OpesSees with new materials implemented. It compiles and runs but I am afraid it might be producing garbage. I searched it online but the little I found didn't help. Any more well-versed C++ developers can come to the rescue? LINK : warning LNK4075: ignoring /IN...
by motalaat
Wed Jul 20, 2005 12:08 am
Forum: OpenSees.exe Users
Topic: Trying to remove nodes
Replies: 6
Views: 8614

Here is the code. Ideally, the "dummy" element 3 should be commented out, and the two commented-out lines near the very end should be uncommented. However, the program crashes before performing the analysis command. Adding the "dummy" element and commenting out the node removal lines was a way to te...
by motalaat
Mon Jul 18, 2005 7:26 pm
Forum: OpenSees.exe Users
Topic: Maximum strain at section analysis
Replies: 13
Views: 15438

I have to say first that I am thankful for this discussion. It has been very useful to learn about the MinMax material. I will need to use is shortly and I had been resorting to an ungraceful manipulation of hysteretic-trilinear instead. As for the section analysis continuing after the farthermost f...
by motalaat
Sun Jul 17, 2005 7:44 pm
Forum: OpenSees.exe Users
Topic: Trying to remove nodes
Replies: 6
Views: 8614

Thanks, Silvia, for a very prompt reply on a Sunday :) I had tried this. I have also dug into the code and found that there is a "remove sp" command, which supposedly removes constraints and "fix" commands". I tried to understand the syntax for that from the coding and I think I got it properly ow t...
by motalaat
Sun Jul 17, 2005 3:59 pm
Forum: OpenSees.exe Users
Topic: Trying to remove nodes
Replies: 6
Views: 8614

Trying to remove nodes

Hello, I have a 2D propped cantilever model. Nothing fancy - two orthogonal beanWithHinge elements set up between 3 nodes. Two nodes are constrained in all DOF and one is free. Within the analysis, I try to use remove element; remove node; remove loadPattern to simulate element loss. The program cra...
by motalaat
Sat May 28, 2005 8:33 pm
Forum: Framework
Topic: Coding Style
Replies: 0
Views: 4130

Coding Style

This question I should have sent by personal email but I thought that putting it here will lend its answers to the eyes of other "newbie" developers like myself who have similar concerns - namely designing their own classes so that when time comes it will not be a big problem to integrate their code...
by motalaat
Thu May 19, 2005 3:45 pm
Forum: OpenSees.exe Users
Topic: Any models to simulate isolation system?
Replies: 6
Views: 8077

Yes!!! Docuemtation again. I ran into at least one occasion where I wanted to use this model (which you can only know of if you happened to be writing your own code in OpenSees for something else - or kept a close eye on the discussion forum) but couldn't because of lack of it. Not only is there no ...
by motalaat
Thu May 19, 2005 1:20 pm
Forum: Framework
Topic: "Possible" Bug with the FiberSection3D?!!
Replies: 1
Views: 4348

"Possible" Bug with the FiberSection3D?!!

Hey, I am set to work on a modified - confined concrete - fiber section starting from the existing one. In exploring the existing code I ran into the following method: FiberSection3d::addFiber { and near the end it recomputes the centroid by // Recompute centroid for (i = 0; i < numFibers; i++) { yL...
by motalaat
Thu Jul 22, 2004 10:59 pm
Forum: OpenSees.exe Users
Topic: Help Needed with Material Model Arguments
Replies: 1
Views: 5068

Help Needed with Material Model Arguments

I am trying to use Steel02, and Concrete02 materials. Does anybody now what typical value to use for the "unloading stiffness ratio" for concrete. More importantly, any idea how the isotropic hardening model variables works? To be more speciific: :!: Let's consider similar hardening in compression a...