Search found 5866 matches

by fmk
Fri Oct 09, 2020 5:38 am
Forum: OpenSees.exe Users
Topic: How to assign different damping to different members in a structure
Replies: 4
Views: 875

Re: How to assign different damping to different members in a structure

put the elements in different regionas and assign different damping values to the different regions
by fmk
Mon Oct 05, 2020 8:24 pm
Forum: OpenSees.exe Users
Topic: staged construction analysis with additional load
Replies: 3
Views: 923

Re: staged construction analysis with additional load

i.e. end of file should look like the following with the loadConst added:

analyze 1
puts "##### STAGE 1 - finished #####";

loadConst -time 0.0

pattern Plain 2 Linear { load 1 0 -1000 0 0 0 0 }

analyze 1
puts "##### STAGE 2 - finished #####";
by fmk
Mon Oct 05, 2020 8:12 pm
Forum: OpenSees.exe Users
Topic: multiple relative node recorder
Replies: 10
Views: 1750

Re: multiple relative node recorder

here is another example in our git repo
https://github.com/OpenSees/OpenSees/bl ... ays/j1.tcl
by fmk
Mon Oct 05, 2020 7:47 pm
Forum: OpenSees.exe Users
Topic: About openses uniaxial material stress-strain curve
Replies: 8
Views: 1405

Re: About openses uniaxial material stress-strain curve

you could try another modelbuilder provided just for testing material .. here is an example i used awhile back model UniaxialMaterialTest uniaxialMaterial Elastic 1 3000 uniaxialMaterial MinMax 2 1 -min -0.001 uniaxialMaterial MinMax 3 1 -max 0.001 uniaxialMaterial MinMax 4 1 -min -0.001 -max 0.001 ...
by fmk
Wed Jun 10, 2020 2:26 pm
Forum: OpenSees.exe Users
Topic: Node fix problem for Modal Analysis
Replies: 2
Views: 713

Re: Node fix problem for Modal Analysis

post the script so i can see how you are modeling the elements
by fmk
Wed May 06, 2020 11:45 am
Forum: OpenSeesPy
Topic: first post
Replies: 5
Views: 1680

first post

checking this works
by fmk
Tue Apr 21, 2020 3:25 pm
Forum: OpenSees.exe Users
Topic: The results in output file is not consistent with that on screen
Replies: 3
Views: 816

Re: The results in output file is not consistent with that on screen

the results are different because the element is "CURRENTLY" (i.e I might change this) just printing forces based on end moments and element length .. the recorder is reporting element forces which are determined from basic forces transformed by the geometric transformation .. for your example you a...
by fmk
Thu Jun 28, 2018 9:48 am
Forum: OpenSees.exe Users
Topic: Can we apply dynamic load using Opensees?
Replies: 8
Views: 2299

Re: Can we apply dynamic load using Opensees?

create a load pattern with a single load on the node you wish to apply the load to .. the load actually applied during the transient analysis will be the value of the load at the node (the pseudo load) TIMES the load factor obtained from the time series.
by fmk
Tue Jun 19, 2018 3:24 am
Forum: OpenSees.exe Users
Topic: Error using "nDMaterial FAReinforcedConcretePlaneStress"
Replies: 11
Views: 2957

Re: Error using "nDMaterial FAReinforcedConcretePlaneStress"

these materials cause problems .. i have some newer materials for modeling walls .. you might even try forgetting the beam elements with these .. here is some code copied from an example put together by Dr. Petrone # Concrete # Parameters for the new concrete model set E [expr 36900e6*$Pa] ;#elastic...
by fmk
Tue Jun 19, 2018 3:19 am
Forum: OpenSees.exe Users
Topic: Modeshape Plots not Responding
Replies: 2
Views: 859

Re: Modeshape Plots not Responding

yes .. we can't really keep the graphics parts operational .. best record them and use matlab
by fmk
Tue Jun 19, 2018 3:17 am
Forum: OpenSees.exe Users
Topic: learning the source code
Replies: 1
Views: 714

Re: learning the source code

go read my dissertation, ignore chapters on parallel programming

opensees.berkeley.edu/OpenSees/doc/fmkdiss.pdf
by fmk
Tue Jun 19, 2018 3:15 am
Forum: OpenSees.exe Users
Topic: Recorder behaviour
Replies: 4
Views: 998

Re: Recorder behaviour

don't use a recorder at all .. get whatever quanaty you are recording from the command line and write them to a file.
by fmk
Fri Jun 08, 2018 8:50 am
Forum: Parallel Processing
Topic: system sparseSYM
Replies: 1
Views: 994

Re: system sparseSYM

how do results compare with Umfpack
by fmk
Fri Jun 08, 2018 8:50 am
Forum: Parallel Processing
Topic: How to Exit Parallel Computing in OpenSeesMP
Replies: 3
Views: 1526

Re: How to Exit Parallel Computing in OpenSeesMP

no .. but just end all but 1 processor, e.g.

# do parallel stuff
if {$myID == 0} {
# do sequential stuff
}
by fmk
Fri Jun 08, 2018 8:48 am
Forum: Framework
Topic: Meaning of "getCommittedStrain" , "getCommittedStress"
Replies: 1
Views: 698

Re: Meaning of "getCommittedStrain" , "getCommittedStress"

the prupose of 1 analysis step is to find the next converged stp, given the current converged step. In the nonlinear analysis the model usually will go through a number of trial steps. these are not on the solution path, but trial solution points. If the convergence test is satisfied at a given tria...