Bearing resistance (Foundation)

Last modified by Fredrik Lagerström on 2021/06/02 16:10

The calculation is made according to EN 1997-1 6.5.2
The following inequality shall be satisfied for all ultimate limit states:

  • Vd ≤ Rd

The current ground pressure Vd shall include the weight of the foundation. The capacity Rd shall be calculated as shown below. The design case STR/GEO should be used with consideration to both geotechnical and constructive loads.

Current ground pressure

A uniform ground pressure is calculated. For eccentric loads the uniform ground pressure is distributed on the effective area B'L'.


Bearing resistance capacity

The capacity is calculated according to EN 1997-1 Annex D.

92997_-_flag_sweden.png Swedish Annex

The bearing resistance capacity is calculated according to [3] eqv. 4.2 and [4] 2.42 and 3.42.

  • For cohesionless soil the calculation is performed for drained conditions (cohesion parameter c = 0).
  • For normally consolidated clay the capacity is calculated with the assumption of undrained conditions (friction slope ϕ = 0) 
  • For over consolidated clay and medium soil the calculation is made with regard to both drained and undrained conditions.
  • For rock allowed values can be found in [4] 3.42.

The partial resistance factor γR,v considering uncertainties in the analytical model is predefined for design approach 3.

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