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)

Material models suitable for soil & rock

Dynamic analysis and liquefaction

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)