beam_solid_bar_slip

[ssimon]

Hello,

I tried to simulate a rebar and concrete model of a tunnel to consider the famous "03_beam_solid_bar_slip.scd"

I want to consider the bond between concrete and rebar, but the running result does not show the stress and strain of the rebar, I checked the model and I don't know where there is a problem, could you help me ? (see attached "*.scd" model).


Best wishes

[STKO Team]

If the beam is modelled with a fiber section, you need to ask for the section.fiber.stress and section.fiber.strain results, and plot them with a Fiber Plot

[ssimon]

THANKS! I think I already know how to show the stresses , but what I show is the figure below,It's not clear to me why there is such points？

[STKO Team]

If you isolate the inner solid and plot a (very) deformed shape you will see that you have a gap in your geometry

gap.png (282.04 KiB) Viewed 2289 times

[ssimon]

It's amazing, thank you.

[STKO Team]

You're welcome

[ssimon]

Dear STKO Team,
Hello, I still have a few questions:
1. Is my unit N, mm, and the b3 coefficient of element -9.8? Or is it -9800?
2. If I want to change to KN, m, what do I need to do in the units in ASD concrete3D material?
3. If I want to apply ground motion to the soil, use the addition of groundmotion or the addition of Uniform Excitation Pattern。
Thank you for your help ！

[STKO Team]

1. Is my unit N, mm, and the b3 coefficient of element -9.8? Or is it -9800?

You have to be consistent: -9800 mm/s^2

2. If I want to change to KN, m, what do I need to do in the units in ASD concrete3D material?

As before: you have to be consistent. Just change the Young's modulus and the fc to kN/m^2.
If you are using one of the presets, you can simply input the units you are using for force (kN) and displacement (m) and it will automatically compute the other parameters with the proper units.

3. If I want to apply ground motion to the soil, use the addition of groundmotion or the addition of Uniform Excitation Pattern。

You can do both, but if your soil is actually an infinite medium, use the ASDAbsorbingBoundary (check our webinars)

[ssimon]

would you mind to recommend me a related link? Learning videos or examples on adding ground motion, adding a uniform excitation mode, and ASDAbsorbingBoundary？

[ssimon]

Hello, STKO team：
I have questions, if the model built with FF and LK is the model I built correct or the deformation is too large so that I can't find out where is the erorr?
By the way, If we use ASDAbsorbingBoundary , is it possible to analyze the soil model with FluidSolidPorousMaterial?
I can't thank you enough