With the release of version 9.0, and the incorporation of a number of important features, RS 2 is now a complete 2D geotechnical nite element program for both rock and soil. The engine of the latest version of RS 2 has been completely upgraded with fully-coupled Biot Theory (hydro-mechanical coupling), among other improvements, and is now a perfect pairing with RS 3, our 3D nite element analysis program. For this reason, we are pleased to announce that we’re re-naming Phase2 to RS 2. Upgrade to RS 2 (Phase2 9.0) today!
RocNews Fall 2014
Phases 1992 – Initial release of Phases, developed by the Rock Engineering Group at the University
of Toronto. Phases was a hybrid nite-element boundary element program for underground excavations in rock. Phases is an acronym for “Plastic Hybrid Analysis of Stress for Estimation of Support.” Development of versions 1 and 2 of Phases continued between 1992 and 1996. Phases was a DOS program, as you can see in the screen capture below.
In case you’ve forgotten what a DOS screen looked like…
Phase2 1996 – Rocscience bought the rights to Phases from the University of Toronto and
developed a new version of the software and changed the name to Phase2. Version 3 was released in 1997. The program had a completely new nite-element engine (with no boundary element support). This nite-element engine formed the basis for later versions of Phase2. New support models and interface improvements were added. The program was still designed for rock excavations but now had better support for near surface excavations (i.e. open pit mining). Version 3 was still in DOS. 1998-1999 – Complete rewrite of the user interface was undertaken to move the program
to a Windows 95 (Win32) based platform. In 1999, Phase2 v4 for Windows was released. 2001 – Phase2 v5 was released. A complete update to the user-interface, addition of pore
pressures and effective stress for failure computation, new support models, staging of properties, etc. was meant to start the push towards a general geotechnical modeling tool for both rock and soil structures.
Introducing RS 2 2
RocNews Fall 2014
As we progress along the Phase2 evolutionary ladder, a typical Windows 95 screen capture from Phase2 5.0.
RS2 2014 – RS 2 (Phase2 9.0) released. RS 2 is an acronym for “Rock and Soil 2-Dimensional
Analysis Program.” Computation engine completely upgraded to include fully-coupled Biot Theory (hydro-mechanical coupling for consolidation analysis), dynamic analysis capabilities, transient groundwater analysis, and much more. RS 2 is a general purpose geotechnical modeling tool able to analyse both soil and rock structures. Just as Phase2 3.0 replaced Phases 2.0 many years ago in 1998, now the long-awaited update to Phase2 8.0 is here. After three years of development, RS 2 (Phase2 9.0) will replace Phase2 8.0.
RS2 9.0 Modeler Interface, embankment consolidation model, Windows 7 Introducing RS 2 3
RocNews Fall 2014
Analyses in Rock:
Analyses in Soil:
RS 2 (Phase2 9.0) is a unique program for nite element
Building on the program’s success in the eld of rock engineering, the latest upgrade of RS 2 (Phase2 9.0) broadens the range of geotechnical applications for which the program can be used.
analyses in rock. RS 2 has earned a reputation as the leading FE program for rock by offering a multitude of unique modeling and analysis features: •
Joint Networks
The major additions to the program, which greatly increase its application to soils problems are:
•
Total Stress Analysis
•
Tunnel Support Design
1. Fully-coupled Biot theory (consolidation)
•
SSR for Jointed Networks
2. Seepage analysis (transient and steady-state)
•
Support Types (bolts, liners, composite liners, piles)
3. Dynamic Analysis
•
Support Capacity Plots
4. New soil material models for sand and clay
RS 2 expands on this by introducing a number of new
Fully-Coupled Biot Theory
features:
RS 2 can now be used to conduct a coupled consolidation
1. Anisotropic rock mass 2. New support-capacity curves 3. Tunnel Wizard 4. Material-dependent joint strength 5. Stress transform calculator
analysis based on Biot Theory. A number of different failure criteria are available in RS 2; these include Mohr-Coulomb, Modied Cam-Clay, and Cap-Cone models. Using these different models, the consolidation analysis can be performed for linear and non-linear material behaviour. In RS 2, consolidation can be done for drained, undrained, and fully drained conditions. Seepage Analysis RS 2 also comes with transient seepage analysis
capabilities, similar to Slide and RS 3. Dynamic Analysis
For a complete list of new features, see What’s New in RS2 9.0 . For more information on the major new soil analysis features see the following articles:
The addition of dynamic analysis capabilities is a signicant addition to RS 2, allowing users to model dynamic loading conditions such as earthquakes, blast, and machine loading scenarios. RS 2 provides a number of dynamic boundary conditions that allow the user to absorb incoming pressure and shear waves, transmit motion into the model, and insert user-dened dashpot dampers and nodal masses to the system. New Material Models
A range of new material models were added to RS 2 to enhance the program’s applicability to soil analyses. The following are some of the new material models:
•
Consolidation
•
Constitutive Modeling
•
Coupled Analysis
•
Mohr-Coulomb with cap
•
Dynamic Analysis
•
Softening/Hardening models
•
User-dened constitutive model
•
Non-linear isotropic elastic
Introducing RS 2 4
