blank output files for section force/deformation recorder

[zareian1]

hi all.
I've modeled a 3-bay 4-story RC moment frame and subjected it to an earthquake record. I've used element type dispBeamColumn and fiber section, I've used the following recorders:
##############################################################
recorder Element -file Data/ele1sec1Force.out –time -ele 1 section 1 force
recorder Element -file Data/ele1sec1Defo.out –time -ele 1 section 1 deformation
##############################################################
but all the output files was empty. can anyone say why this happening ?

[vesna]

Your recorders look good to me.

What version of OpenSees do you use?

Will it work if you change the section number to let say 3?

[zareian1]

Dear Vesna Thank you so much for your attention,
I use version 2.3.0 of OpenSees, my model is without any error or warning ,but even when i change the section number the output files is empty!!!
section force/deformation recorder only work for the zeroLength elements in my model.

[vesna]

I tested it on an example, and I could record both forces and deformations. Usually you see blank files if in one of the recorders defined before these ones you had an error.

[wuhaoshrek]

vesna wrote:
> I tested it on an example, and I could record both forces and deformations.
> Usually you see blank files if in one of the recorders defined before these
> ones you had an error.

Dear vesna,
I still cannot output any information whenever I am using dispbeamColumn element, my recorder code is as follows:

############################################################################
recorder Element -file $dataDir/ele111sec3Defo1.out –time -ele 111 section 3 deformation
############################################################################

and I have not found ant error during the analysis.
it really puzzled me, thanks in advance for your help.

[mokiao]

vesna wrote:
> I tested it on an example, and I could record both forces and deformations.
> Usually you see blank files if in one of the recorders defined before these
> ones you had an error.

I have exact the same problem, My recorder is like "recorder Element -file series/defor1.out -time -ele 3 section 1 deformation;" and there is no error and the output file is empty, too.
But in some other recorders I can get the results, but I don't understand the output which has four columns for the deformation, for one section 3D problem, shouldn't it be TWO( axial-strain and curvature)?
Can you explain it?
thanks so much!

[wangbin_tongji]

sometime this error is from the wrong writing of "-time".

If you copy the recorder sentence from the Openseeswiki, and paste them in your TCL file. There may be have a error for the output.
But if you type the sentence yourself, there may be successful.

[mokiao]

wangbin_tongji wrote:
> sometime this error is from the wrong writing of "-time".
>
> If you copy the recorder sentence from the Openseeswiki, and paste them in
> your TCL file. There may be have a error for the output.
> But if you type the sentence yourself, there may be successful.
OK, i see. so how to explain the four columns output for a section's deformation, which should not be two (axial-strain and curvature)? Thanks a lot!

[vesna]

3D section will have four columns at least: axial deformation, curvatures in local y and z, and torsional deformation.

If you record deformation using -xml instead of -file you will get information about each column of your output file.

[Halim]

Dear all,
I also have the same problem, though I am new in this field, I wrote an already done example to get familiar with Opensees.
I put the code very carefully as it was done.= No error.
But all the output files are empty.

Need your help

[vesna]

What recorders did you use?

[Halim]

Thank you Vesna,
My problem solved. The output will come out when the "wipe" command is done or "exit" the opensees.

[vesna]

glad you solved it!

[linguan118]

Sometimes, it happens!