The SBR+ program can be used to calculate the magnitude and the progression in time of the settlements and foundation tilting caused by volume or shape changes in the subsoil, which occur under perpendicular, static loading. Lifting due to relief by excavation can be calculated analogously. The shares from immediate and consolidation settlements are always calculated as a standard. Optionally you can add creep settlement. Via the definition of borehole profiles, a polygonal topographical model can be interpolated automatically.
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- Optional inclusion of creep settlement
- Automatic calculation of the limit settlement (abortion criterion)
- Dimensions and subdivisions of the model area
- Freely selectable number and position of the design points
- Any number of soil layers, with different thicknesses, if applicable
- Also, polygonal layer boundaries are possible
- Freely selectable soil parameters
- Special parameters for the calculation of settlements due to consolidation and creep
- Any polygonal three-dimensional ground surface can be defined
Via the definition of a freely selectable number of borehole profiles a polygonal ground surface and soil layer model can be interpolated automatically. For this interpolation, the user can assign any layer structure to each borehole profile.
Stagnant groundwater can optionally be taken into account. The buoyant unit weight of the water-saturated soil is automatically considered.
Excavation relief (heave) due to foundation construction, construction pits, or excavations can optionally be taken into account by defining excavation areas.
The external loads can apply in the form of infinite perpendicular area loads, concentrated loads or limited block loads at any position at the level of the ground top edge.
Asymmetrical trapezoidal loads with different load ordinates at the respective edges can also be modelled at any position and with variable orientation.
By defining excavation areas, all loads can also be applied at a depth z below the ground top edge.
The number of ground-surface loads, their type of action, as well as the limit state and the design situation to be considered can be selected as desired.
The load cases are automatically superimposed in accordance with the applicable superposition rules depending on the selected limit state and design situation.
Method of calculation
- Assumption of slack loads
- Indirect calculation of settlements with soil stresses in the isotropic elastic half-space
- Stresses are determined in accordance with Boussinesq, Steinbrenner, Tölke using stress influence coefficients
- Calculation of settlements through stress integration
- Calculation of the immediate settlement s0, the consolidation settlement s1 and, optionally, of the creep settlement s2
Document file formats
- The settlements can be put out for any number of freely selectable design points
- Output of a settlement trough over the entire model area
- Stress influence coefficients i per load case and per design point
- Settlement influence depth
- Stress-settlement diagram over the depth per design point
- Stress-settlement diagram according to the settlement shares s0, s1, s2, and stot per design point
- Time-settlement diagram per design point
- Isolated Foundation FD+
- Pad Foundation FDB+
- Mast Foundation FDM+
- Reinforced Raft Foundation FDR+
- Strip Foundation FDS+
- Pile Foundation Pfahl+
- Building Model GEO
Note on load import:
From the FD+ foundation program and the GEO Building Model, the decisive loads, including eccentricities, can be imported as block loads, either load case by load case or as superimposed loads.
For the calculation of base slabs, base pressures can be imported from GEO, which are simulated by a sufficient number of concentrated loads.
- DIN EN 1997
- ÖNORM EN 1997
- PN EN 1997