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

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Sension
Posts: 12
Joined: Mon Feb 24, 2020 2:43 am

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

Post by Sension » Fri Apr 17, 2020 7:14 am

Hi, everyone.
As a beginner, I ran the "ElasticFrame.tcl" script (https://opensees.berkeley.edu/wiki/inde ... me_Example).

But I found the shear force of element in output file was NOT the same as that on screen, while axial force and moment were consistent. E.g., V of element 1 is 65.7665 on screen, but in output file, it's 63.9773.

I didn't change any code. It seems to be relevent to lateral force. Does anyone encounter this problem?

selimgunay
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Location: University of California, Berkeley

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

Post by selimgunay » Tue Apr 21, 2020 1:19 pm

Are you recording the same quantities in the output file and on the screen?

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

Post by fmk » Tue Apr 21, 2020 3:25 pm

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 are seeing differences due to PDelta .. if you set the transformation for the columns Linear the numbers should match.

Sension
Posts: 12
Joined: Mon Feb 24, 2020 2:43 am

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

Post by Sension » Wed Apr 22, 2020 1:44 am

fmk wrote:
> 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 are seeing differences due to PDelta .. if you set the
> transformation for the columns Linear the numbers should match.
Thanks! So if I set PDelta, the results in recorder is more precise than that on screen "currently".

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