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Is there any recorder to obtain energies dissipated in the model such as plastic energy, input energy, damping energy, etc? It'd be very useful for energy based seismic design of structures.

Thanks again!

Hi,
I'm trying to obtain in a concentrated plasticity model the damping forces aiming at obtaining the damping energy by integration of damping forces and nodal displacements. I've used the model for damping "modalDamping" and the recorders "rayleighForces" and "rayleighForces!". With the first recorder, I obtained damping force equal to 0 in all nodes in each step and, with the second recorder, I obtained a line of data for each mode that I understand that they are the forces obtained for each mode and node in each step.

Could I use the recorder “rayleighForces” in "modalDamping" or it is only valid for rayleigh command?

Could someone explain me how I can obtain the total damping energy dissipated by the model along an earthquake? I mean the outputs that I would need to compute it.

I really appreciate any comment

Best regards and thanks in advance

Hi guys,
Would it be possible to finish one analysis and then use these results as a starting point to begin the next analysis?
I guess that it would be possible to begin a new analysis imposing the permanent displacement from the previous analysis, but what I really want is to start the new analysis from the ultimate position of the hysteretic loops of the elements in the last analysis.

Do you know what I mean?

I'm waiting for your responses

Regards,
David

Finally, I found a forum where apparently it is explained.

viewtopic.php?f=7&t=63276

If I'm right, it is not possible to perform buckling analysis in OpenSees. Is there any intention to update the software in this sense?

Regards,
David

If you get a solution, please post it

Not yet. We will wait for a solution

Do you have the same problem?

Hello everyone,
I tried to install StarCluster on Windows for running my models on AWS cloud. I follow successful the steps until I reach the following step:

"Once you’ve installed the above dependencies into your Python 2.7 installation you can now run:

c:\> easy_install StarCluster"

When I copy-paste "easy_install StarCluster" on CMD (with permissions), like this:

C:\Python27\Scripts>easy_install StarCluster

This is the answer:
Searching for StarCluster
Reading http://pypi.python.org/simple/StarCluster/
Couldn't find index page for 'StarCluster' (maybe misspelled?)
Scanning index of all packages (this may take a while)
Reading http://pypi.python.org/simple/
No local packages or download links found for StarCluster
Best match: None
Traceback (most recent call last):
File "C:\Python27\Scripts\easy_install-script.py", line 8, in <module>
load_entry_point('setuptools==0.6c11', 'console_scripts', 'easy_install')()
File "C:\Python27\lib\site-packages\setuptools\command\easy_install.py", line 1712, in main
with_ei_usage(lambda:
File "C:\Python27\lib\site-packages\setuptools\command\easy_install.py", line 1700, in with_ei_usage
return f()
File "C:\Python27\lib\site-packages\setuptools\command\easy_install.py", line 1716, in <lambda>
distclass=DistributionWithoutHelpCommands, **kw
File "C:\Python27\lib\distutils\core.py", line 152, in setup
dist.run_commands()
File "C:\Python27\lib\distutils\dist.py", line 953, in run_commands
self.run_command(cmd)
File "C:\Python27\lib\distutils\dist.py", line 972, in run_command
cmd_obj.run()
File "C:\Python27\lib\site-packages\setuptools\command\easy_install.py", line 211, in run
self.easy_install(spec, not self.no_deps)
File "C:\Python27\lib\site-packages\setuptools\command\easy_install.py", line 434, in easy_install
self.local_index
File "C:\Python27\lib\site-packages\setuptools\package_index.py", line 475, in fetch_distribution
return dist.clone(location=self.download(dist.location, tmpdir))
AttributeError: 'NoneType' object has no attribute 'clone'

C:\Python27\Scripts>

Please help to solve the issue

Thanks in advance guys.

I have the same problem. Did you fix the problem,TPdct?
Could anyone write a tipical values for H and delta parameters for steel or aluminium?

Thanks guys!

Yes, it is
You must use system FullGeneral and after your analysis, you must add the following:

set controlTime [getTime];
set ok [analyze 1 $dtcal]; <----------Your analysis
set Kfile [join [concat "K" "$controlTime" ".out"] "" ]
printA -file $Kfile;

Thanks Silimgunay!
And what about Force vector?, is there any implemented function to obtain it? like printA for K and M

Thanks!

Hello,
I would like to know how many steps the ground motion has, when I use the script bellow. I mean, I have a file with the ground motion acceleratons but when I introduce it to OpenSees by "set AccelSeries " Series -dt $dt -filePath $outFile -factor $GMfatt" " I would like to know the vector size. This way, I will be able to indicate the maximum time of the earthquake.

# Bidirectional Uniform Earthquake ground motion (uniform acceleration input at all support nodes)
set Earthquakes Earthquakes
set iGMdirection "1 2"; # ground-motion direction
set iGMfact "1.0 1.0"; # ground-motion scaling factor
set dt 0.005

set IDloadTag 400; # for uniformSupport excitation
foreach GMdirection $iGMdirection GMfile $iGMfile GMfact $iGMfact {
incr IDloadTag;
# set inFile $Earthquakes/$GMfile.at2
set outFile $Earthquakes/$GMfile.txt; # set variable holding new filename (PEER files have .at2/dt2 extension)
# ReadSMDFile $inFile $outFile dt; # call procedure to convert the ground-motion file
set GMfatt [expr $g*$GMfact]; # data in input file is in g Unifts -- ACCELERATION TH
set AccelSeries "Series -dt $dt -filePath $outFile -factor $GMfatt"; # time series information <----------------------------------------- I guess that it is in somewhere from here
pattern UniformExcitation $IDloadTag $GMdirection -accel $AccelSeries ; # create Unifform excitation
}

Thanks a lot!
David

Some elements are not created for parallel compiting. In my case, I use section LayeredShell which doesn't work in parallel.

I have the same question