Plotting of Concrete Reinforcement Ratio

About the development of the FEM module/workbench.

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HarryvL
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Re: Plotting of Concrete Reinforcement Ratio

Postby HarryvL » Sat May 26, 2018 9:30 am

bernd wrote:
Thu May 24, 2018 7:42 pm
Since the geometry has to be changed it will be difficault to do this on a building by just ckicking the two objects and say hinged.
Not really. You "just" need to generate extra nodes for those edges that need to be disconnected. No change in geometry needed for that. In the end a freely rotating hinge will have been created once one straight line remains connected.
Last edited by HarryvL on Sat May 26, 2018 9:56 am, edited 3 times in total.
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HarryvL
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Re: Plotting of Concrete Reinforcement Ratio

Postby HarryvL » Sat May 26, 2018 9:41 am

So you could think of of a dialog box where users can select points, edges or faces that need to be disconnected (nodes duplicated). That would give biggest flexibility to introduce extra degrees of freedom.
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bernd
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Re: Plotting of Concrete Reinforcement Ratio

Postby bernd » Sat May 26, 2018 12:21 pm

you are right, that way it vould work ...
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HarryvL
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Re: Plotting of Concrete Reinforcement Ratio

Postby HarryvL » Sat May 26, 2018 9:20 pm

HarryvL wrote:
Fri May 25, 2018 2:59 pm
Thanks Bernd. It works. Let the testing continue :D
Block under uniform tension. Results in the 4 steel bars are automatically suppressed, as intended.

TestMM_20.png
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HarryvL
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Re: Plotting of Concrete Reinforcement Ratio

Postby HarryvL » Sat May 26, 2018 10:29 pm

Two stacked 0.3x0.3x3.0m concrete columns with cantilever beam support, loaded by 0.5MN (50Te) beam reaction:

Concrete_Column_Mesh.png
Concrete_Column_Mesh.png (240.79 KiB) Viewed 230 times
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Concrete_Column_ReRa_x.png
Concrete_Column_ReRa_x.png (67.89 KiB) Viewed 230 times
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Concrete_Column_ReRa_y.png
Concrete_Column_ReRa_y.png (59.29 KiB) Viewed 230 times
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Concrete_Column_ReRa_z.png
Concrete_Column_ReRa_z.png (61.2 KiB) Viewed 230 times
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bernd
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Re: Plotting of Concrete Reinforcement Ratio

Postby bernd » Sun May 27, 2018 7:44 am

where exact did you load the column? The whole cantilever face?
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HarryvL
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Re: Plotting of Concrete Reinforcement Ratio

Postby HarryvL » Sun May 27, 2018 8:18 am

Yes I loaded the full face.
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HarryvL
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Re: Plotting of Concrete Reinforcement Ratio

Postby HarryvL » Sun May 27, 2018 8:26 am

I have uploaded the 4 files affected by this development to my public repository (HarryvL), which I rebaselined on the FC master . Not sure how to progress from here. Some user interface issues still to be resolved, e.g. for now 3 material parameters (rebar yield strength fy, concrete compressive strength fck, concrete friction angle Phi) are all hard coded.
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Re: Plotting of Concrete Reinforcement Ratio

Postby HarryvL » Sun May 27, 2018 11:10 am

thschrader wrote:
Wed May 23, 2018 8:34 pm
HarryvL wrote:
Tue May 22, 2018 7:23 pm
1) Maybe we should try square x-section rather than round. The shape doesn't matter too much. It's just a way to introduce an internal load.

2) We could try mixed meshes once it can handle embedding 1D or 2D elements in 3D. It would be ideal to model the cable as a string of 1D elements. Or even a 2 D strip would be a great simplification.
OK, when using a square section for the rebars (based on parabolic sketch/extrude)
instead of using a sweeped circle the mehing/refinement works. And I got more than 500000 cells.
Using 1D elements for the rebars is a good idea... :)
parabolicRebar.JPG
meshRefinement.JPG
Thomas, how did you model the parabola in the sketch?
thschrader
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Re: Plotting of Concrete Reinforcement Ratio

Postby thschrader » Sun May 27, 2018 12:50 pm

HarryvL wrote:
Sun May 27, 2018 11:10 am
Thomas, how did you model the parabola in the sketch?
Open sketcher-wb, draw sketch with "arc of parabola by focus, vertex, endpoints" tool
(click on cone-symbol to open menue).
Extrude sketch with part-wb.
parabolic_rebar_mesh.FCStd
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sketch.JPG
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