The Concrete model was initially developed as a user defined soil model (called Shotcrete model) in cooperation with Graz University of Technology. The model allows users to take into account time dependent strength and stiffness of concrete, strain hardening/ softening in compression and tension as well as creep and shrinkage. Most of the input parameters for the shotcrete model can be derived from standard uniaxial tension and compression tests. While the model was mainly developed to model the behaviour of shotcrete, it has also proven useful in applications related to soil improvements, for example jet grout columns.
Since the release of PLAXIS 2D 2018 and PLAXIS 3D 2018 the Concrete model is now part of the standard material library for Bentley Geotechnical SELECT Entitlement [GSE] (former PLAXIS-VIP) subscribers. More information is found in the Material Models manuals.
Update October 2018
Available as standard material model since PLAXIS 3D 2018.00 for users with Geotechnical SELECT Entitlement [GSE] enabled (formerly known as Bentley Geotechnical SELECT Entitlement [GSE] (former PLAXIS-VIP)).
Update March 2018
Available as standard material model since PLAXIS 2D 2018.00 for users with Bentley Geotechnical SELECT Entitlement [GSE] (former PLAXIS-VIP)
Update August 2017
How to use a user defined soil model in PLAXIS
PLAXIS 2D Tunnel Designer
PLAXIS 3D Tunnel Designer
On the Use of the ShotCrete UDSM for Modelling Concrete
Plaxis User Defined Soil Models
64 bit User Defined Soil model
[Tips and Tricks]
[Solved] Concrete model in 2D 2018.00 swaps horizontal stresses each step