Why do I obtain such high contact stresses at the foundation edges of my floor slab?

Answer

Depending on how solid is the foundation body, the soil contact stress distribution under this structural component changes as well. In the case of elastic foundation bodies that are loaded by a uniform surface load, it is generally assumed that the distribution of soil pressure is a mirror image of the load. The plate forms a subsidence basin. However, the more rigid the plate is, the more the soil contact stress rises towards the edge (theoretically limitless).

These theoretically infinite stresses cannot be absorbed by the soil, of course. The soil would probably deflect laterally at the edge and the stress would migrate inwards from the edge.

Keywords

Soil contact stress distribution Soil contact stress Contact stress Plate edge

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Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

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