CPillar is a quick, interactive, and easy-to-use analysis tool for evaluating the stability of surface or underground crown pillars, and laminated roof beds.
CPillar 4.0 offers three different limit equilibrium analysis methods: Rigid or Elastic plate analysis, and Voussoir (no tension) plate analysis. Additionally, there is an option between a Deterministic or Probabilistic analysis. Probabilistic analysis allows you to define statistical distributions of input data and calculate probability of failure. Furthermore, sensitivity analysis allows you to determine the effect of individual variables on safety factor.
Failure modes include Shear, Elastic, or Gravity buckling, as well as Compression. A Rigid analysis considers the Shear (vertical slippage at abutments) failure mode. An Elastic analysis considers the Shear and Elastic buckling failure modes. The Voussoir analysis considers the Shear, Arch snap-thru (buckling due to gravity), and localized crushing failure modes.
In a Probabilistic Analysis, you can define statistical distributions for input parameters, to account for uncertainty in the values of input parameters. When the analysis is computed, this results in a safety factor distribution from which a probability of failure (PF) is calculated. A Monte Carlo or Latin Hypercube sampling method is selected. The data can be viewed in histograms, cumulative plots, and scatter plots.
* CPillar download link provides trial version of the software.
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