Data visualization of the RC frame model

Hello! In this section we'll talk about the post processing module and the data visualization.
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Chaymaa
Posts: 21
Joined: Wed May 11, 2022 4:28 pm

Data visualization of the RC frame model

Post by Chaymaa » Fri May 13, 2022 5:46 pm

Dear STKO teams,

I am trying to learn how to use STKO, that's why I decided to rebuilt the RC-frame model that I’ve found on your YouTube channel (https://www.youtube.com/watch?v=BomvTEn64M8&t=2477s). However, it seems like I don’t get the same results, nor the same visualization of the fiber sections map.

I attached the file, any help would be much appreciated.
RC_Frame_test.zip
(154.31 KiB) Downloaded 16 times
Best regards,

Chaymaa,

STKO Team
Posts: 1346
Joined: Tue Oct 29, 2019 8:45 am

Re: Data visualization of the RC frame model

Post by STKO Team » Tue May 17, 2022 10:53 am

Could you be more specific?
I can reproduce a fiber plot:
fiber.png
fiber.png (435.42 KiB) Viewed 244 times

Chaymaa
Posts: 21
Joined: Wed May 11, 2022 4:28 pm

Re: Data visualization of the RC frame model

Post by Chaymaa » Tue May 17, 2022 4:20 pm

Hi,
I meant by not getting the same results; not getting the same distribution of strain nor stress. I can’t visualize the deformations too. I’ve tried also to draw the displacement of the master node as shown in the video, but I don’t get the same behavior.
Attachments
The curve I must get.png
The curve I must get.png (311.32 KiB) Viewed 238 times
My curve.png
My curve.png (241.39 KiB) Viewed 238 times
Viedo.png
Viedo.png (536.64 KiB) Viewed 238 times
Mine.png
Mine.png (634.47 KiB) Viewed 238 times

STKO Team
Posts: 1346
Joined: Tue Oct 29, 2019 8:45 am

Re: Data visualization of the RC frame model

Post by STKO Team » Thu May 19, 2022 10:34 am

The error in the pushover curve is because you put the wrong Target Displacement (too small).
In the old version of STKO used in that webinar, I was using an increment = 0.1 mm with 1000 steps for a total of 100 mm.

In the current version, it's easier. You should directly input the final target displacement (100 mm in this case).
And now you can also use adaptive time steps for better control of the convergence:
new_analysis_contros.png
new_analysis_contros.png (47.02 KiB) Viewed 213 times
Regarding the fiber plots, if you want to use the old-style, i.e. same size for all fibers, you can do this:
fiber_plot_old_style.png
fiber_plot_old_style.png (404.58 KiB) Viewed 213 times

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