Search found 5866 matches

by fmk
Mon Aug 16, 2004 10:25 am
Forum: OpenSees.exe Users
Topic: Nonhomogeneous single point constraints
Replies: 1
Views: 3696

transformation should work if no dof is constrained more than once, e.g no equalDOF and sp. we don't yet follow the path. for the lagrange you probably have to change the convergence test, disp increments for penalty and unbalance for lagrange. as for the penalty it should give you the correct respo...
by fmk
Mon Aug 09, 2004 7:29 pm
Forum: Framework
Topic: compile problems with vc++
Replies: 7
Views: 8376

i have fixed the visualstudio.net and vc6.0++ project files .. both now assume tcl8.4 or greater .. the current files can be obtained from cvs .. the tarball source code distribution of the new 1.6.0 release will be at the website shortly.
by fmk
Mon Aug 09, 2004 7:25 pm
Forum: OpenSees.exe Users
Topic: Database - Saving and Restarting Analysis
Replies: 13
Views: 7824

i have fixed the code for these .. avail with 1.6.0 and higher.

if anybody notices any other things that fail when the save/restore commands are used please post them in this thread.

thanks.
by fmk
Mon Aug 09, 2004 2:22 pm
Forum: Framework
Topic: How to incorporate new material models into OpenSees
Replies: 1
Views: 3572

the material can themselves keep track of their previous stress state ..
remember this is an object-oriented code and not a procedural one .. objects can keep track of whatever other info they need themselves.
by fmk
Mon Aug 09, 2004 11:20 am
Forum: OpenSees.exe Users
Topic: Pushover analysis of concrete column
Replies: 2
Views: 3596

you are probably using the dispBeamColumn .. use the (forceBeamColumn) nonlinearBeamColumn instead .. given nodal disp the force based element iterates to get a displacement field which exatcly satisfies force equi of element (force field known exactly for force based element) .. the displacement ba...
by fmk
Mon Jul 26, 2004 1:51 pm
Forum: OpenSees.exe Users
Topic: Tension and compression for ZeroLength elements
Replies: 1
Views: 3258

you are correct .. it is dof at the jnode - the dof at the inode .. we do need to make this clearer in the manual.
by fmk
Wed Jul 21, 2004 11:49 am
Forum: Framework
Topic: Geometric Nonlinearity
Replies: 4
Views: 6587

you can use the corotational transformation with the force (nonlinearBeamColumn) and displlacement beam column elements.
by fmk
Wed Jul 21, 2004 10:45 am
Forum: Framework
Topic: compiling problems with VC++ 6
Replies: 1
Views: 5582

the problem is tcl/tk .. they have tightened up their api betwen versions 8.3 and 8.4 .. a lot of procedures now take const char * instead of char * .. as we have developers trying to compile with both versions we have defined TCL_Char in OPS_Globals.h .. if you look at the OpenSees files that call ...
by fmk
Wed Jul 07, 2004 12:04 pm
Forum: OpenSees.exe Users
Topic: Node Recorder
Replies: 2
Views: 3619

i have just placed a new executable on the website .. version 1.5.3 .. it does not appear
to have the problem you describe .. maybe you could test it, if problem persists .. could
you try and post the script so i can run it and see what's up.
by fmk
Wed Jul 07, 2004 11:39 am
Forum: Framework
Topic: VPN?
Replies: 1
Views: 3295

i don't see this message with my current windows .exe version 1.5.3 .. i will put
a tarball of the latest source code online shortly.
by fmk
Wed Jul 07, 2004 11:35 am
Forum: Documentation
Topic: how can I see previous question somebody else submit during?
Replies: 1
Views: 3634

you can't .. i could not bring the old message board back up on new server .. there was not that many messages anyway.
by fmk
Thu Jul 01, 2004 8:38 am
Forum: OpenSees.exe Users
Topic: Can I control displacement and load at the same time?
Replies: 2
Views: 4582

can you be a bit more specific. you could for example use loadControl and in 1 pattern place the loads which use one path and in another specify the displacements which follow some other path .. this is IMPOSED DISPLACEMENTS and NOT DISPLACEMENT CONTROL :twisted: Most people want displacement cotrol...
by fmk
Wed Jun 30, 2004 2:38 pm
Forum: OpenSees.exe Users
Topic: Stiffness proportional damping does not seem to work
Replies: 4
Views: 5027

truss and zeroLength elements determine their own damping .. all other elements use the default provided by the Element classial will work .. that is why providing eta for the material will work .. it is something that obviously needs to be clearly documented and i apologise that it is not
by fmk
Mon Jun 28, 2004 3:26 pm
Forum: Framework
Topic: OpenSees compling
Replies: 2
Views: 4507

did you look to see if you have the header and library files?? .. they will be in
C:\Program Files\tcl\include and C:\Program Files\lib
by fmk
Fri Jun 25, 2004 3:37 pm
Forum: OpenSees.exe Users
Topic: Questions on beam-column joint analysis
Replies: 1
Views: 5007

ansewrs to your questions: 1. nodes and elements DO NOT have to be continuous. 2. you just have to enter 2 DIFFERENT nodes, remember the material for the ZeroLength will define the force-deformation and not stress-strain relationship. the 'strain' sent to the material at each step will be the differ...