Comparing Itasca’s Approach to Limit Equilibrium

Itasca’s finite volume (FV) approach uses the shear strength reduction (SSR) method for numerical modeling. This formulation is far superior to more traditional limit equilibrium (LE) methods and offers several advantages over finite element (FE) methods as well.

  • Produce mechanics-based failure mechanisms
    • No need to specify a range of trial surfaces in advance
    • Revealing failure mechanisms that were not originally appreciated—including multiple or complex mechanisms
    • Can model more complex ground behavior (e.g., stress-dependent material behavior, soil saturation, groundwater flow)
    • Enhanced judgment from seeing realistic mechanisms
  • Observe displacement progression
    • Deformations at the “failure state” are kinematically valid
    • Is the Service Limit State more critical than the Ultimate Limit State?
  • Incorporate ground support
    • Full soil-structure interaction (beams, sheet pile walls, piles, liners, anchors, etc.)
    • LE can’t address deformable structures fully
    • Create a safety map (FoS contours)
  • Apply to complex sites and issues
    • Ability to use advanced exploration data, such as CPTu
    • Ability to use advanced monitoring data (including rate effects)
    • Using the output and visualizations to help describe risk for strength, permeability, and deformation problems
    • Better understanding of project risk/confidence for decision-making
    • Evaluation of the effectiveness of proposed designs

In addition to continuum modeling, Itasca also offers engineering analysis using its DEM software—UDEC and 3DEC for jointed and blocky rock, and PFC for brittle intact rock, granular, or synthetic rock mass (SRM) engineering as well as for fundamental research.

Latest News
  • Test Post 1 This is a test post....
    Read More
  • Itasca Partners with Rescale for FLAC3D Cloud Computing With the advent of web licenses, Itasca software can be run in the cloud via...
    Read More
  • Software Forum Now Open Itasca has launched a new software forum to provide a platform for users to ask...
    Read More

Upcoming Events
15 Oct
FRAGBLAST 13
The International Symposium on Rock Fragmentation by Blasting (FRAGBLAST) is an international forum for sharing the state of the art in... Read More
17 Oct
International Slope Stability 2022 Symposium
Slope Stability 2022 is being held in Tucson, Arizona, USA from October 17 through October 21, 2022.... Read More