Modelling GFRC

[OscarGaunt]

Hi

I am currently trying to model Glass Fribre Reinforced caldding panels as FE panels in Robot. From what I understand GFRC design is categoriosed by Ultimate Flexural Strength not compressive strength  as with normal concrete.

Is there a way to manually  change the Flexural Strength of a material? I have checked Peferences --> Material --> Modification but can't see any option there to control the Flexural Strength.

Thanks for your time.

Oscar G

[Rafal.Gaweda · Accepted solution]

I think these ways for panels:

[Rafal.Gaweda]

But if you mean RC design module - not possible

[OscarGaunt]

Thanks! No did not mean design module. Just wanted to model the correct behaviour of the material for analysis.

[OscarGaunt]

I'm sorry but I am stuggling to get this to work. I do not understand the units

I need to simply change the Flexural strength to 18MPa. Is there a way you could show me step by step if you have time?

Thank you

Oscar 

[Rafal.Gaweda]

I need to simply change the Flexural strength to 18MPa.

No way.

[OscarGaunt]

Thanks

[OscarGaunt]

Sorry are you saying that it can't be done or you can't not show me how it is done?

[Rafal.Gaweda]

Can not be done

http://forums.autodesk.com/t5/Robot-Structural-Analysis/Modelling-GFRC/m-p/5115734#M24759

[t.sautierr · Accepted solution]

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OscarGaunt wrote:

I need to simply change the Flexural strength to 18MPa. 

didn't you mean flexural stiffness? -> no way to calculate the resistance, but you can model a lot of different material with different behavior.

Then you have to calculate the coefficient and put them manually : see example for a slab with stiffener. make ha =0 or a = infinity and you will get the formulas for a slab with uniform thickness. Or take it from a book.

You can also choose a pre defined thickness type and display the corresponding matrix. By playing on the paramters you will see what is affected in the matrix

You can also 

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[OscarGaunt]

Thank you!