Why use DIANA?
Geotechnical applications, and the interaction between the ground and structure, often provide engineers with technically demanding challenges that are best solved with DIANA FEA.
The program provides a wide range of state-of-the art constitutive models for tackling soil and rock materials in applications as diverse as foundations, embankments, tunnels, excavations, slope stability, mines and dams.
The analysis capabilities for pore pressure and consolidation, groundwater flow, earthquake and liquefaction problems are some of the most advanced available and are essential for accurate analysis of these types of coupled problems.
DIANA also offers advanced features to model steel and reinforced concrete structures that interact with the ground.
In addition to the geotechnical specific technical data and specifications below, see also the general functionality information (to the right of this page). Our range of brochures are also available for download. Or, if you have a specific question about DIANA that would like to ask, please use the webform.
Dedicated Features for Geotechnical Engineering
- In-situ Stress ( Ko procedure/gravity loading/pre-stress) and Pore-pressure Initialisation
- Construction staged analysis
- Drained /undrained analysis
- Seepage analysis (steady state / transient)
- Saturated or partially saturated flow
- Consolidation analysis (full coupled stress-flow analysis)
- Pressure dependent degree of saturation
- Freely moving phreatic surfaces
- Porosity or saturation dependent permeability
- Deformation dependent density and porosity
- Dynamic (linear and nonlinear) and liquefaction analysis
- Special (embedded) pile elements with nonlinear pile shaft and toe interfaces
- Anchors, nails, and rock bolt modelling
- Geotextiles
- Strength reduction analysis (phi-c)
- Engineering liquefaction
- Mohr-Coulomb, Tresca
- Drucker-Prager, Von Mises
- Transversely Isotropic
- Duncan-Chang
- Hoek-Brown
- Jointed Rock
- Modified Cam-Clay Jardine (London clay)
- Modified Mohr-Coulomb (Cap model)
- Classic Brick
- Special Interface Models
- User supplied subroutine
- Eigenvalue analysis (eigenfrequencies, eigenmodes, participation factors, effective masses)
- Direct frequency response analysis
- Modal frequency response analysis
- Spectral response analysis (ABS, SRSS, and CQC modal combinations)
- Linear and nonlinear time domain analysis (total, transient and steady state, solution)
- Various time integration methods, e.g. Newmark, Wilson-theta, Runge-Kutta
- Hybrid Frequency-time domain analysis (steady state solution)
- Fluid-structure interaction
- Multi-directional base acceleration loads
- Prescribed nodal acceleration loads
- Distributed mass elements (2D line elements + 3D surface elements)
- Bounding/boundary elements for far field behavior (2D line elements + 3D surface elements)
- Viscous, structural, and continuous damping
- Specified or calculated initial conditions
- Consistent or lumped mass and/or damping matrices
- Towhata-Iai liquefaction model (2D models and largely un-drained conditions)
- Nishi liquefaction model (for 2D/3D, partially drained conditions, arbitrary shearing direction)
- Bowl liquefaction model (for 2D/3D, partially drained conditions, horizontal shearing)
- User-supplied liquefaction models (USRLIQ subroutine)
