Search found 39 matches

by zvidrih
Fri Jun 08, 2012 2:54 am
Forum: OpenSees.exe Users
Topic: Plot stress-strain curve
Replies: 3
Views: 4430

Re: Plot stress-strain curve

Hi Marco,

simply create a .tcl with zerolength element (or whatever element) with your material, load the "free" node and record the force-displacement relationship. Later you can reuse this script for testing of any material (backbone or hysteresis)...
by zvidrih
Sat Apr 21, 2012 1:35 am
Forum: OpenSees.exe Users
Topic: sourcing two tcl files in a row with Matlab
Replies: 2
Views: 3206

Re: sourcing two tcl files in a row with Matlab

Hi,

why don't you simply create a new "main.tcl", which sources both of your files and then evaluate main.tcl in matlab.
by zvidrih
Tue Aug 17, 2010 4:22 am
Forum: OpenSees.exe Users
Topic: fiber section ERROR
Replies: 7
Views: 6132

input file

Hi,

please paste your input file. No one can help you, if you don't define the problem. Those errors could be anything...
by zvidrih
Mon Aug 16, 2010 6:46 am
Forum: Framework
Topic: parameters optimization in MATLAB with OPENSEES
Replies: 5
Views: 11531

simple

Hi, I am not sure what exactly is your question, but I usualy connect matlab with opensees in the following way: 1) write and save the tcl input file by matlab... eg. file = fopen('matlabinput.tcl', 'w+'); fprintf(file,'model BasicBuilder -ndm 3 -ndf 6 \n'); fprintf(file,'... fclose(file); 2) run op...
by zvidrih
Tue Jun 22, 2010 12:13 am
Forum: OpenSees.exe Users
Topic: help me plz,somebody help me???!!!!!fiber section?
Replies: 3
Views: 3426

it's ok

hi,

there must be something wrong with your input code
the fiber section in 2d is indeed oriented as defined in the manual (z axis is mayor). Post your code, and somebody will help you for sure.
you should also check the examples section...
by zvidrih
Sat May 15, 2010 10:17 am
Forum: OpenSees.exe Users
Topic: element command inside loop
Replies: 6
Views: 5937

puts

Hi,

there is nothing wrong with your code if you have "enough" nodes...

use puts command inside the for loop to check where is the problem, e.g.

for...
puts "element dispBeamColumn $k $i $j 5 7 2;"

}

and then check if your model has all the nodes you need...
by zvidrih
Fri May 14, 2010 4:25 am
Forum: OpenSees.exe Users
Topic: element command inside loop
Replies: 6
Views: 5937

counter

You have only defined 116 nodes, but you want to go till 496 ...

"for {set i 2} { $i < 496 } {incr i 23} {"
by zvidrih
Wed Feb 17, 2010 9:01 am
Forum: OpenSees.exe Users
Topic: From OpenSees to Matlab
Replies: 3
Views: 4070

keep it simple

You can always output the variables using "puts" command to a text file with an *.m extension, e.g. set a 1; set b 2; set c [expr $a+$b] set file [open matlaboutput.m a] puts file "a=$a;" puts file "b=$b;" puts file "c=$c;" close $file then you can run the &qu...
by zvidrih
Mon Dec 14, 2009 1:52 pm
Forum: OpenSees.exe Users
Topic: How to model a friction?
Replies: 3
Views: 3545

contact

You can also try using one of the ZeroLengthContact elements:

[url]
http://opensees.berkeley.edu/OpenSees/m ... l/4139.htm
[/url]
[url]
http://opensees.berkeley.edu/cgi-bin/cv ... eroLength/
[/url]
by zvidrih
Sun Oct 11, 2009 10:36 am
Forum: Documentation
Topic: Concrete07 possible typo in the epsilon_c0?
Replies: 2
Views: 5317

typo

You 're right

there' s a typo, the nominator should be 1153, that is 4000/(145^0.25), instead of only 4000/145.

1 MPa ~ 145 psi
by zvidrih
Thu Sep 03, 2009 5:00 am
Forum: OpenSees.exe Users
Topic: who has the early version of opensees
Replies: 1
Views: 2434

Old version

Hi,

the source codes of all versions from 1.0 above are available at developer download section...
by zvidrih
Mon Aug 31, 2009 12:57 pm
Forum: OpenSees.exe Users
Topic: Peak-Orinted
Replies: 13
Views: 16218

Clough

Hi, sorry for late response, I am quite sure, that "Clough" material, implemented in OpenSees, is actually the Ibarra model Copy pasted from PEER report: "Altoontash (2004) implemented this model into OpenSees (2006) as a material model that is accessed through the “Clough” material m...
by zvidrih
Wed May 13, 2009 6:29 am
Forum: OpenSees.exe Users
Topic: Displacment excitation input
Replies: 19
Views: 11781

About double

to: yfeng [quote] 1. Displacement data is always stored one on each line in displ.txt. After we read the $fl into data, do we still need to split it on newlines? [/quote] This is just a precaution - I only tried to give the example, but i think it's necessary. The same goes to your question 2. Since...
by zvidrih
Tue May 12, 2009 1:40 am
Forum: OpenSees.exe Users
Topic: Displacment excitation input
Replies: 19
Views: 11781

Cyclic test

Hi, on the other hand you can also modify the static reversed cyclic analysis (example 4 - 2D file: Ex4.Portal2D.analyze.Static.Cycle.tcl) in the above example file the cyclic load is generated automaticaly, but you can read $iDmax from a file: eg: (read displacements from a file disp.txt set stepI ...
by zvidrih
Sat Apr 04, 2009 7:58 am
Forum: OpenSees.exe Users
Topic: Section analysis
Replies: 17
Views: 11813

loadcontrol

I have just noticed the line:


integrator LoadControl 0 1 0 0


You want your load factor to be 0, so your forces are all zero...

Simply use

integrator LoadControl 1

if you want to apply the load in one single step...