Bearing Resistance Failure

GBR+

The program performs the general ground failure verification for multi-layer soils above and below the foundation base, whose friction angle deviates by 5 degrees maximum from the mean friction angle. The shares of the skin surface that are in contact with the individual soil layers are calculated. The mean friction angle is redetermined in proportion to these surface areas and the ground failure mode is recalculated. The iterative process is repeated until convergence is reached. Subsequently, the mean cohesion coefficients and the mean specific weight are determined in accordance with the surface shares of the soil layers based on the ground failure mode. Furthermore, the resistance to overturning, the safety against displacement and the permissible base pressure are verified.

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Structural system
  • Rectangular or strip foundations
  • Optionally with eccentric column/wall

Soil:

  • Any number of horizontal layers
  • Freely selectable soil parameters
  • Permissible base pressure resistance based on empirical values of DIN 1054

Ground surface:

  • Horizontal or continuously ascending
  • Any number of polygonal ground-surface sections

Groundwater:

  • Stagnant groundwater can optionally be taken into account at any height level

 

Loads
  • Any column loads for biaxial loading, if applicable:
    • Vertical concentrated load V
    • Horizontal concentrated load in the x- and y-direction (optionally acting at the top edge of the column or in the foundation joint)
    • Concentrated moments about the x-axis and the y-axis
  • Any additional loads applying to the foundation as concentrated loads, line loads, or area loads.
  • Free assignment of loads to types of actions according to EC 0 as well as to concurrency and alternative groups.
  • General distinction between the definition of design loads and characteristic loads with automatic load case combination.
General
  • Selection of the consequence classes
  • Optional design in the transient (or persistent) design situation
Geotechnical verifications
  • Simplified verification with base pressure resistances (either user-defined or taken from tables of DIN 1054)
  • Optional verifications using the accurate calculation method:
    • Overturning
    • Sliding
    • Ground failure
  • Optional settlement verification
  • Serviceability via the verification of the gaping joint and torsion
Document file formats
  • PDF
  • Word
  • Printer
General
  • Various output profiles available for selection (brief, detailed, user-defined)
  • Selectable graphic scales and font sizes
  • Detailed output of individual load cases and associated base pressures
  • Overview of the decisive load case combinations and their assignment to design situations (persistent, transient, accidental and earthquake)
Geotechnical verifications
  • Tabular and graphical output of the selected decisive actions and base pressures for each selected geotechnical verification
  • Verifications in the ULS (simplified with base pressure, overturning, sliding, ground failure)
  • Verifications in the SLS (first and second core range, settlements, and torsion)
Transfer options
  • Slabs by Finite Elements PLT
  • Isolated Foundation FD+
  • Block Foundation FDB+
  • Mast Foundation FDM+
  • Strip Foundation FDS+
  • Reinforced Raft Foundation FDR+
  • Beam on Elastic Foundation BEB+
  • Soil Settlement SBR+
Geotechnical standards
  • EN 1997
  • DIN EN 1997
  • ÖNORM EN 1997
  • PN EN 1997
  • DIN 1054
  • DIN 4017
  • DIN 4019
  • ÖNORM B 4435-1
  • ÖNORM B 4435-2
  • BS 8004:2015
Add-on FD+ PRO

With the additional option FD+ PRO, the foundation programs FD+, FDB+, FDS+ and GBR+ can be extended to include:

  • an earth pressure approach
  • an inclined foundation base
  • a seismic ground failure verification
  • a ground failure – punching shear verification
  • a bearing capacity calculation of the foundation soil with a table of design values of the base pressure resistance.
  • a graphical output of the internal forces along the main axes

Note on the free 30-day demo
The additional option FD+ PRO can also be tested for 30 days without a license. As soon as you call up a function from FD+ PRO, you will be asked whether the function should start as a demo.

Find out more about the range of functions of the FD+ PRO in the video.

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