Key features

  • Fully interactive environment that allows models to be created and modified quickly on screen
  • Graphic can present vivid animation of failure
  • DXF import capability
  • Work in Metric or Imperial units
  • Built-in library of standard materials and the capability to define others, including those using Mohr-Coulomb, Rigid and Tension Cutoff models
  • Soil-nail and sheet-pile wall modeling capability
  • Specify a global water table and / or model a different water
    pressure distributions in each soil layer. Possibilities include:
    -  Conventional water table
    -  Uniform potential
    -  Uniform pressure
    -  User-defined grid of pressure values
  • Facility to solve for critical Strength factors, i.e. Factor of Safety
  • Facility to solve for multiple partial factor sets (e.g., load and resistance factors) and drainage conditions in one analysis using the built-in ‘Scenario Manager’
  • Solver engine able to identify translational and/or rotational failure mechanisms
  • Analyze problems involving seismic ground accelerations
  • Context sensitive help system
  • Ability to display animated and 3D rendered views of the failure mechanism
  • Comprehensive report output facility 

Technology
The powerful Discontinuity Layout Optimization (DLO) procedure uses rigorous upper-bound limit analysis theory to automatically identify the critical layout of slip-lines in a failing soil mass. So with DLO there is no need for the user to ‘pre-judge’ the types of failure mechanism expected to be most critical.

Easy to verify solutions
Unlike most other state-of-the-art analysis tools, output from LimitState: GEO is easy to check. The software can output a free- body diagram for each sliding block involved in the failure mechanism - complete with force equilibrium equations which are straightforward to check by hand, ensuring no error has been made when setting up the problem and providing a clear and easy means of checking solution validity. LimitState: GEO has also been verified against a wide range of closed form solutions and other benchmarks, all of which can be viewed online. To find out more visit: www.limitstate.com/geo/verification

LRFD? It is Eurocode 7 ready
AASHTO LRFD does not have guidelines for slope stability analysis.  However, it provides factors and guidelines related to walls and foundations.  While LimitState:GEO is generic, it can be manipulated to meet ‘pseudo LRFD’ conditions since it has the Eurocode 7 (EC7) option. By utilizing partial factors that are independent of problem type, EC7 provides the engineer with a robust and flexible limit state design methodology.

LimitState:GEO is fully compatible with the EC7 philosophy and has:

  • Built in EC7 ‘problem-agnostic’ partial factor sets
  • EC7 compatible load descriptions (permanent, variable, accidental)
  • Favorable and unfavorable load classifications
  • The ability to check multiple Design Approaches / Combinations in one analysis, highlighting the critical case Compatibility with the EC7 framework also enables LimitState:GEO to be readily used in conjunction with many other Limit State Design methodologies.

 

 

 

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