How to calculate stress in slab on ground
How to calculate stress in slab on ground
(OP)
Hi,
If I have a slab 6in thick on a soil with Kwinkler = 100 pci and a live load of 150 psf.
How do you evaluate the ground stress and the slab concrete stress ?
Thank you,
SilverBeam75
If I have a slab 6in thick on a soil with Kwinkler = 100 pci and a live load of 150 psf.
How do you evaluate the ground stress and the slab concrete stress ?
Thank you,
SilverBeam75






RE: How to calculate stress in slab on ground
This way you can test the mechanical effect of application of loads at corners, edges and inwards the slab. FEM can also acommodate jointing by weaker elements or actual joints in the model.
RE: How to calculate stress in slab on ground
RE: How to calculate stress in slab on ground
RE: How to calculate stress in slab on ground
RE: How to calculate stress in slab on ground
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RE: How to calculate stress in slab on ground
RE: How to calculate stress in slab on ground
Despite being published in 1988, it is still (surprisingly) relevant to your question. Essentially, they recommend adjusting the soil springs in your model along the corner and edge strips of the mat. This is intended to produce a dishing or cupping effect in the slab.
IMO, this is a much easier (and more practical) method of analyzing the foundation than what others have so far recommended.
RE: How to calculate stress in slab on ground
I used this in the early 90's to design slabs on grade for point loads. There may be line load capabilities as well.
A fully distributed load will not put stress into the slab, but if you can nail down point loads (such as those from a rack or other component), these usually govern the design.
tg