topic Re: Get kz in Robot Structural Analysis Forum

Get kz

Anonymous — Wed, 25 Feb 2015 17:10:06 GMT

Hello

I'm creating a concrete closed gallery. This gallery is supported in a ground, where I only know the value of Young's modulus (E) and angle of friction. Is there a way to get the elastic foundation coefficient (kZ) with only those values?

P.S. Sorry for my english, it isn't my native languague.

Thank You

MAria Silva

Re: Get kz

rsousa_ — Wed, 25 Feb 2015 18:30:02 GMT

Dear Maria,

for example, You can calculate that with Vesic Formulas. Please see Foundations Analysis and design book from Bowles. Chapter 9.6. (google it)

ks=Es/(B*(1-n^2))

Es- stress- strain modulus

B - footing width

n- poisson ratio.

From my experience, if you have a concrete slab with elastic support, use kz=Es and evaluate the same model with kz=0.5*Es and kz=2*Es. All the formulas you will get are aproximations and you need to check how "sensible" your model is to kz.

Hope it will help you.

Regards

Re: Get kz

Artur.Kosakowski — Thu, 26 Feb 2015 08:57:37 GMT

Hi Maria,

As far as I can see you try to 'reach' us in many ways

In addition to the answer that you should have already received from me you may want to check chapter 3.5 from http://etd.lib.metu.edu.tr/upload/12615084/index.pdf

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.

Re: Get kz

Anonymous — Thu, 26 Feb 2015 10:01:30 GMT

Thank you rsousa_ that was very helpfull. I will take a look 🙂

Re: Get kz

Anonymous — Thu, 26 Feb 2015 10:03:22 GMT

Hello Artur Kosakowski,

I didn't know which one was the best way, so I try both ;D

Thank you for your answer, that was very helpfull. I will take a look !