Rocscience

- 2D Geotechnical Finite Element Analysis

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RS2 (Phase2 9.0) is a powerful 2D finite element program for soil and rock applications (RS2 = Rock and Soil 2-dimensional analysis program). RS2 can be used for a wide range of engineering projects and includes excavation design, slope stability, groundwater seepage, probabilistic analysis, consolidation, and dynamic analysis capabilities.

Complex, multi-stage models can be easily created and quickly analyzed - tunnels in weak or jointed rock, underground powerhouse caverns, open pit mines and slopes, embankments, MSE stabilized earth structures, and much more. Progressive failure, support interaction and a variety of other problems can be addressed.

RS2 offers a wide range of support modeling options. Liner elements can be applied in the modeling of shotcrete, concrete, steel set systems, retaining walls, piles, multi-layer composite liners, geotextiles, and more. Liner design tools include support capacity plots, which allow you to determine the safety factor of reinforced liners. Bolt types include end anchored, fully bonded, cable bolts, split sets, and grouted tiebacks.

One of the major features of RS2 is finite element slope stability analysis using the shear strength reduction method. This option is fully automated and can be used with either Mohr-Coulomb or Hoek-Brown strength parameters. Slope models can be imported or exported between Slide2 and RS2 allowing easy comparison of limit equilibrium and finite element results.

RS2 includes steady-state, finite element groundwater seepage analysis built right into the program. There is no need to use a separate groundwater program. Pore pressure is determined as well as flow and gradient, based on user defined hydraulic boundary conditions and material conductivity. Pore pressure results are automatically incorporated into the stress analysis.

Material models for rock and soil include Mohr-Coulomb, Generalized Hoek-Brown and Cam-Clay. Powerful new analysis features for modeling jointed rock allow you to automatically generate discrete joint or fracture networks according to a variety of statistical models. With new 64-bit and multi-core parallel processing options RS2 can solve larger and more complex models in shorter times.

Modeling

  • Interactive geometry entry
  • Intuitive workflow tabs
  • Boundaries – external, material, excavation, stage, joint, piezo, structural interface
  • Grid/vertex/object snapping
  • Sequential staging of excavation and support (up to 300 stages)
  • Plane strain or axisymmetric analysis
  • One-click material assignment
  • Import/export in .dxf files
  • Unlimited undo/redo
  • Right-click editing shortcuts
  • Tunnel Wizard

Elements & Meshing

  • Triangular or quadrilateral finite elements
  • 3 or 6-noded triangles
  • 4 or 8-noded quadrilaterals
  • One-click mesh generation
  • Graded, uniform or radial meshing
  • Mapped meshing
  • Custom meshing
  • Check/define mesh quality
  • Easily apply boundary conditions

Materials

  • Elastic or non-linear
  • Strength criteria – Mohr-Coulomb, Generalized Hoek-Brown, Cam-Clay, Modified Cam-Clay, Drucker-Prager, discrete function, anisotropic, Mohr-Coulomb with Cap, Softening/Hardening
  • Staged material properties
  • Datum dependent properties
  • Isotropic, transversely isotropic, orthotropic elastic models
  • Import from RocData
  • User-defined material models library, including ChSoil, CySoil, Harding Soil and Hardening Soil with Small Strain Stiffness

Groundwater

  • Finite element steady state or transient seepage analysis
  • Staged groundwater
  • Material permeability functions
  • Discharge sections
  • Piezometric lines
  • Pore pressure grids
  • Fully-coupled consolidation
  • Include pore pressure for effective stress analysis

Support

  • Staged support installation
  • Bolt types – end anchored, fully bonded, cable bolts, Swellex, split-set, tiebacks
  • Liner types – beam, reinforced concrete, geotextile, cable truss
  • Composite liners
  • Reinforcement database
  • Timoshenko or Bernoulli beam models
  • Staged liner properties
  • Elastic or non-linear
  • Peak/residual strength
  • Interactive support capacity plots (thrust/moment, thrust/shear) for reinforced concrete liners (includes CSA, ACI, EC2 codes)

Far-field Stress

  • Constant stress field
  • Gravity stress field
  • Multiple stress fields (customize per material)

Finite Element Slope Stability

  • Automated FE slope stability using shear strength reduction (SSR) method
  • Define SSR include area
  • Define SSR exclude area
  • Import/export Slide2 models

Loads

  • Constant or linear distributed loads
  • Concentrated load
  • Seismic load
  • Ponded water load
  • Staged loading
  • Springs
  • Dynamic

Joints

  • Elastic or non-linear
  • Mohr-Coulomb, Barton-Bandis, Hyperbolic, or material-dependent slip criterion
  • Natural or artificial joints
  • Pressurized joints
  • Staged joint properties
  • Statistical modeling of joint networks

Probabilistic Analysis

  • Monte Carlo, Latin Hypercube, Point Estimate methods
  • Random variables - materials, joint properties, field stress
  • Contour/error plots of statistical output

Data Interpretation

  • View stress, displacement, strength factor contours
  • Effective stress, pore pressure contours
  • Contour user-defined data
  • Stress/failure trajectories, deformation vectors
  • Display deformations to userdefined scale
  • Query and graph material, support, joint data
  • Export to Excel
  • Show values directly on model
  • Highlight yielded material, support, joint elements
  • Add iso-contours

  • Dams
  • Embankments
  • Groundwater
  • Rock
  • Tunnels
  • Soil
  • Mining
  • Slope Stability
  • Retaining Walls
  • Excavations
  • Settlement

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