Hello!
I've been making a STKO model following one of the e-learning videos and so far everything seems to be fine, except for one error that I can't figure out what's happening.
When I run it, the following window appears (attached)
I have tried changing the tolerance values and the same error appears.
Does anyone know what I might be doing wrong?
(The file is also attached)
Thank you!
S
Element greater than the tolerance
Element greater than the tolerance
- Attachments
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- PSJ_v2.zip
- (326.55 KiB) Downloaded 194 times
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- exe_window.PNG (406.79 KiB) Viewed 3507 times
Re: Element greater than the tolerance
The warning about the zerolength element is not an issue. It simply reminds you that you assigned a non-zero length to a zero-length element.
The problem is that your model is singular.
There is a mistake in the bridge's beam geometry.
The geometry is a simple compound of 1 egde and multiple vertices. However, a compound is just a group (i.e. the vertices are not intersecting the edge so the piers are detached from the beam).
What you have to do now is:
The problem is that your model is singular.
There is a mistake in the bridge's beam geometry.
The geometry is a simple compound of 1 egde and multiple vertices. However, a compound is just a group (i.e. the vertices are not intersecting the edge so the piers are detached from the beam).
What you have to do now is:
- Explode the compound geometry
- Select the edge and vertices you obtain after exploding the compound
- Merge them
- Attachments
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- WRONG_GEOM.png (262.46 KiB) Viewed 3485 times
Re: Element greater than the tolerance
Hello dear STKO team,
I applied your suggestion to my model but unfortunately didn't solve the problem, I continue to not be able to run the analysis.
Is there anything else I should do?
Best,
S
I applied your suggestion to my model but unfortunately didn't solve the problem, I continue to not be able to run the analysis.
Is there anything else I should do?
Best,
S
- Attachments
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- exe.window_error.png (652.12 KiB) Viewed 3473 times
Re: Element greater than the tolerance
There is also a mistake in the self-weight.
For example, for the beam you have -7e6 N/mm.
But if the self-weight of concrete (using N and mm as units) is 2.5e-5 N/mm^3 and the area of the deck is 8e3 x 7e2 = 5.6e6 mm^2, the beam load should be -2.5e-5 N/mm^3 x 5.6e6 mm^2 = 1.4e2 N/mm
Your load seems to be 4 orders of magnitude higher.
Did I miss something?
For example, for the beam you have -7e6 N/mm.
But if the self-weight of concrete (using N and mm as units) is 2.5e-5 N/mm^3 and the area of the deck is 8e3 x 7e2 = 5.6e6 mm^2, the beam load should be -2.5e-5 N/mm^3 x 5.6e6 mm^2 = 1.4e2 N/mm
Your load seems to be 4 orders of magnitude higher.
Did I miss something?
Re: Element greater than the tolerance
Thank you for warning me, Yes I made a mistake on my sw calculations excel.
However, I can't still run the model, the analysis fails.
However, I can't still run the model, the analysis fails.
- Attachments
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- exe_window2.PNG (531.59 KiB) Viewed 3442 times
Re: Element greater than the tolerance
Can you share your updated model?
Re: Element greater than the tolerance
Sure!
- Attachments
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- PSJ_v2.zip
- (327.07 KiB) Downloaded 253 times
Re: Element greater than the tolerance
Sorry but there are some other errors about units I think.
The E of the uniaxial material for shear (in the section aggregator) should be the shear stiffness of the column, so it should be G*A*5/6, but you put a value close to E.
Same thing for GJ
Please, double check your model and the consistency of the unit system
The E of the uniaxial material for shear (in the section aggregator) should be the shear stiffness of the column, so it should be G*A*5/6, but you put a value close to E.
Same thing for GJ
Please, double check your model and the consistency of the unit system
Re: Element greater than the tolerance
I'll, thank you very much!
Re: Element greater than the tolerance
You're welcome