This video shows how the input for Soil Massifs generated from Soil Samples can be defined within the Add-On Geotechnical Analysis. With the Soil Massif the soil solids that shall be analyzed, the soil layer surfaces, the boundary surface supports, and optionally the ground water level surface are generated. The structure that was generated then can be used for meshing, loading and analysis.
How to Define Soil Massifs in RFEM 6
![Superstructure and Soil Massif](/en/webimage/032040/3327270/EN_1.png?mw=512&hash=ab89cd9cb5658abc8b4719242f1c9e322c29cd8a)
![Model](/en/webimage/031979/3326593/EN_1.png?mw=512&hash=ab89cd9cb5658abc8b4719242f1c9e322c29cd8a)
![Image 1: Specific Parameters of Nonlinear Elastic Soil Material Model](/en/webimage/040222/3508620/2023-04-27_EN.png?mw=512&hash=7306cf5703c93779b07140d3ba5c912eab870a2f)
![FE Model of Steel Connection](/en/webimage/052000/4028239/1.png?mw=512&hash=9d7f6c198b6d4ae6ee8f2fa8bca75f85579e14c9)
![Calculation Diagram](/en/webimage/032596/3342772/diagram.png?mw=512&hash=6a3197e561482860ce0de8f93bd0d9df22c9c3f5)
Are you ready for the evaluation? Use the calculation diagrams, which show the distribution of a specific result during the calculation.
You can freely define the layout of the vertical and horizontal axes of the calculation diagram. This allows you, for example, to consider the settlement distribution of a certain node, depending on the load.
![Printout Report with Graphics of Stress Results](/en/webimage/032590/3342486/printout_report.png?mw=512&hash=56f821d9133c263062c522bc9c6cb487f0d73c8e)
Your data are always documented in a multilingual printout report. You can adjust the content at any time and save it as a template. You can also add graphics, texts, MathML formulas, and PDF documents to your report with just a few clicks.
![Soil Material Models](/en/webimage/032309/3379367/32309_EN.png?mw=512&hash=9ee42caa2642d66d141bcaa5a26fdadfb0337cf4)
Do you want to model and analyze the behavior of a soil solid? To ensure this, special suitable material models have been implemented in RFEM.
You can use the modified Mohr-Coulomb model with a linear-elastic ideal-plastic model or a nonlinear elastic model with an oedometric stress-strain relation. The limit criterion, which describes the transition from the elastic area to that of the plastic flow, is defined according to Mohr-Coulomb.
![Feature 002860 | Soil Material Model "Modified Hardening Soil Model" for Geotechnical Analysis](/en/webimage/051835/4010960/2024-08-02_GUI.jpg?mw=512&hash=6839d119eede80bf09e08894c6c54b2c83819650)
In the Geotechnical Analysis add-on, the high-quality material model "Modified Hardening Soil Model" is available. This material model is suitable for a variety of soils and is able to appropriately represent the following properties of the real soil.
- Stress dependence of soil stiffness
- Load path dependence of soil stiffness
- Plastic strains even before reaching the limit condition
- Increasing shear resistance with increasing mesh refinement
- Increasing yield strength with increasing stress until reaching the limit yield condition
- Failure criterion according to Mohr-Coulomb
You can find more information about this material model and the definition of the input in RFEM in the corresponding chapter of the online manual for the Geotechnical Analysis add-on.