The JointedRock model is a three dimensional equivalent continuum constitutive model developed for stress - strain analysis of fractured rock masses. The constitutive equations of the equivalent continuum are established for a representative elementary volume (REV) of rock mass based on the principles of continuum mechanics. The mechanical properties of fractures are incorporated in the constitutive equations of the model using the principle of conservation of energy for the work done on the REV. Fractures are in the form of planar joint sets, such as bedding planes, whose spatial configuration is defined by dip/dip direction and spacing in the model. Up to three joint sets of arbitrary orientation can be added to the model.


  • stress-strain analysis


Agharazi A, Martin CD, Tannant DD. (2012) "A Three dimensional equivalent continuum constitutive model for jointed rock masses of up to three joint sets". Geomechanics and Geoengineering: An International Journal. 2012, Vol.8, pp 1-12

Agharazi A, Tannant DD, Martin CD. (2013) "Characterizing rock mass deformation mechanisms during plate load tests at the Bakhtiary dam project". International Journal of Rock Mechanics and Mining Sciences. 2012, Vol.49, pp 1-11

Agharazi A., (2013) “Development of a 3D Equivalent Continuum Model for Deformation Analysis of Systematically Jointed Rock Masses”, PhD Thesis, University of Alberta


UDM Version: 10/15/2012
Release Date: May 9, 2016

Category: Jointed Rock

Software: Download: Contact: Developer:

Latest News
  • Itasca Software now Available for Linux Version 7 or greater of Itasca software (FLAC3D, 3DEC, PFC3D, and PFC2D) are now operable...
    Read More
  • Model Plot Contest Winners Itasca is pleased to announce the winners and honorary mentions of our Model Plot Contest...
    Read More
  • Got Old Software? Itasca's latest versions offer many new features and are optimized to run faster on today's...
    Read More

Upcoming Events
7 Mar
FLAC 2022 Online, Live Introductory Training
FLAC is numerical modeling software for advanced geotechnical analysis of soil, rock, groundwater, and ground support in two dimensions... Read More
21 Mar
FLAC3D 2022 Online, Live Introductory Training
This "hands-on" course includes Basic Concepts and Recommended Procedures for Geotechnical Numerical Analysis. A more focused fourth da... Read More
4 Apr
PFC 2022 Online, Live Introductory Training
This four-day course provides guidance in the use of the PFC2D and PFC3D to simulate the mechanical behavior of granular and solid mate... Read More