Search found 24 matches

by amkopensees
Thu Nov 12, 2015 8:10 pm
Forum: OpenSees.exe Users
Topic: Zero curvature recorded byeleResponse in version 2.4.6
Replies: 2
Views: 2339

Re: Zero curvature recorded byeleResponse in version 2.4.6

Thank you for your prompt response. I double checked and it seems that the number of digits stored for the output in version 2.4.6 is less than version 2.4.4 If I want the outputs in a text file the "Recorder" command works just fine. However, "eleResponse" not, since the values ...
by amkopensees
Tue Nov 10, 2015 8:50 pm
Forum: OpenSees.exe Users
Topic: Zero curvature recorded byeleResponse in version 2.4.6
Replies: 2
Views: 2339

Zero curvature recorded byeleResponse in version 2.4.6

Hi, I have a 3D bridge model with concrete columns models with fiber section. I use eleResponse command to save the curvature of the elements in tcl lists for further analysis using the following format: eleResponse $element_number section $integration_point deformation I used this command in the la...
by amkopensees
Sun Sep 13, 2015 8:29 am
Forum: OpenSees.exe Users
Topic: Saving the results in a tcl list
Replies: 3
Views: 3008

Re: Saving the results in a tcl list

I found this page which I think should be the answer of my question:
http://opensees.berkeley.edu/wiki/index ... t_Commands
Thanks though.
by amkopensees
Sun Sep 13, 2015 8:16 am
Forum: OpenSees.exe Users
Topic: Saving the results in a tcl list
Replies: 3
Views: 3008

Re: Saving the results in a tcl list

Dear fmk, Thank you for your response. Is there an equivalent command for every type of node and element recorder? I am aware of the following commands for node reactions and element forces: nodeReaction eleForce How about other types of outputs? For example element deformation outputs. Or outputs f...
by amkopensees
Thu Sep 10, 2015 5:28 pm
Forum: OpenSees.exe Users
Topic: Saving the results in a tcl list
Replies: 3
Views: 3008

Saving the results in a tcl list

Hi, Is it possible to save the results of a time history analysis in a tcl list. For example element forces of a particular element of the model in all time steps of the analysis. I need to get a lot of outputs from my model and I think this amount of IO makes the process slower. Also the size of th...
by amkopensees
Mon Jul 06, 2015 3:10 pm
Forum: OpenSees.exe Users
Topic: Problem with damping force
Replies: 4
Views: 3527

Re: Problem with damping force

Dear fmk, Its absolutely fine. Hope you had a nice holiday. I checked the velocities at different nodes. I think they look reasonable. For example, I looked at the base node which is fixed in all DOFs. It shows zero velocity (as it should be), but there are those spikes in the damping force. The vel...
by amkopensees
Fri Jun 19, 2015 1:39 pm
Forum: OpenSees.exe Users
Topic: Problem with damping force
Replies: 4
Views: 3527

Re: Problem with damping force

Dear fmk,

I tried Plain constraint and still I have the same problem!
by amkopensees
Wed Jun 03, 2015 4:12 pm
Forum: OpenSees.exe Users
Topic: Problem with damping force
Replies: 4
Views: 3527

Problem with damping force

Hi, I have a problem with the damping force I get from my analysis. I have a simple cantilever column which is a concrete column modeled with fiber section. The mass is applied to the top node. My problem is when I check the damping forces at different nodes, other than the base node (fixed node at ...
by amkopensees
Mon Jul 08, 2013 3:59 am
Forum: OpenSees.exe Users
Topic: Using rigid link elements with zero length elements!
Replies: 5
Views: 4436

Re: Using rigid link elements with zero length elements!

Its just meaningless random numbers. If you run the model you will see what I mean.
by amkopensees
Sun Jul 07, 2013 9:16 am
Forum: OpenSees.exe Users
Topic: Using rigid link elements with zero length elements!
Replies: 5
Views: 4436

Re: Using rigid link elements with zero length elements!

Yes, you are right. But actually I need to make this work for another model. I want to know why this simple model does not work.
by amkopensees
Wed Jul 03, 2013 9:17 am
Forum: OpenSees.exe Users
Topic: Elastic beam column with distributed mass
Replies: 2
Views: 3076

Re: Elastic beam column with distributed mass

This is how the element is described in the website:

element elasticBeamColumn $eleTag $iNode $jNode $A $E $Iz $transfTag <-mass $massDens>

so, maybe the website needs to be updates!
by amkopensees
Wed Jul 03, 2013 5:02 am
Forum: OpenSees.exe Users
Topic: Elastic beam column with distributed mass
Replies: 2
Views: 3076

Elastic beam column with distributed mass

Has anyone used distributed mass option of the "elasticBeamColumn" element?
I tried to use it and it returns the following error:
invalid d - elasticBeamColumn 2100 iNode jNode A E I alpha d
expected floating-point number but got "-mass"
by amkopensees
Tue Jul 02, 2013 6:34 am
Forum: OpenSees.exe Users
Topic: Using rigid link elements with zero length elements!
Replies: 5
Views: 4436

Using rigid link elements with zero length elements!

I have a very simple model as follows. The models is two rigid link beam elements which are connected to each other with a zero length element. I want to pull one end of one of the rigid elements and evaluate the deformation and force of the rigid link element. However it returns wrong answer. Would...
by amkopensees
Mon Jun 03, 2013 12:53 pm
Forum: OpenSees.exe Users
Topic: Eigen Value Analysis
Replies: 8
Views: 6934

Re: Eigen Value Analysis

Thanks a lot.
by amkopensees
Fri May 31, 2013 7:08 pm
Forum: OpenSees.exe Users
Topic: Eigen Value Analysis
Replies: 8
Views: 6934

Re: Eigen Value Analysis

Dear fmk, I think you forgot to put the solver type right at the end of the code. I mean you have: puts "#dirn mass acting: $massDirn solverType: $solverType eigenvalue: [eigen 1]" So, the solver is always the default. I think it should be as follows if you want to try it with both solvers...