Soil Structure Interaction#
This task allows the user to perform a simple foundation analysis using the halfspace substructure method.
See also
For further information and description regarding technical background, please refer to the PDF manual HASE.
Visit our geotechnical tutorials, where the task has been used:
Note
In the basic program version, only halfspace problems with plane slab structures can be processed. Halfspace analysis for three-dimensional systems, in addition to the substructure techniques, is available in the extended program version.
A linear elastic stiffness matrix will be generated for the halfspace processing, therefore a superpositioning is possible. A combination with the other FEA programs is also possible.
The program determines a stiffness matrix for any structure size. These structures can be assembled either from Finite Elements or described analytically e.g. as an elastic halfspace with appropriate soil parameters. Soil parameters will be defined by bore profiles, either within a new task “Bore Profile” or directly inside the task “Halfspace Calculation”. Both tasks can be added by using the context menu inside the sidebar with the right mouse click and the command “Insert Task”.
Note
The bore profile task must be added before inserting the task “Halfspace Calculation”.
Additional examples are available inside the program directory:
The SSD task 
‘’Soil Structure Interaction’’ contains
following tabs:
General
Groups
Control Parameters
Text Output
Soil Response
Graphical Output
General#
In the first general tab you can select the loadcases and bore profiles.
There are three options for interpolation of the bore profile is available:
Constant (exactly one bore profile)
Weighted interpolation (at least one bore profile)
Soil layers (at least three bore profiles)
In the group “Stiffness factors” you may set the coefficient for the stiffness in X and Y direction. The horizontal stiffness is taken as a coefficient in X or Y direction multiplied with the vertical stiffness.
Groups#
In the groups tab you can select the group that should be analyzed.
The default is set to ALL.
Control Parameters#
In the “Control Parameters” tab you can set the solver or activate the warping torsion.
Soil Response#
The “Soil Response” tab is used for post-processing. If you activate the checkbox “Evaluate soils response”, then you will have the option to store results (e.g. stresses) to a certain loadcase.
“Generate volume system” will generate a new CDB with the BRIC (volume) elements. This way you can visualize your system and also see the results.
In the table of the depth storing results. You can decide at which depth, the results should be stored.