This section contains Tips and Tricks for PLAXIS 2D and PLAXIS 3D and answers to Frequently Asked Questions.
It is possible for projects to have various loads being deactivated in a calculation phase. When checking PLAXIS Output results, it can happen that the visualization of the load is still visible even though the value of the load is set to zero. The load arrows may still be visible as the load is not yet fully deactivated, as ΣΜstage is not yet equal to one (1) and not all out-of-balance is solved for this calculation phase.
When you need to apply a time-dependent radial load in a Dynamics calculation, you need to set the same Dynamic Load Multiplier for the directions.
Plaxis remote scripting is built using the HTTP protocol. With correct firewall settings and password renewals, attacks can be prevented.
To save energy, Plaxis allows for an environmentally friendly (green) option to shut down your computer once all Plaxis calculations are finished: an option called gogreen. Read this article for the details.
With PLAXIS 3D CONNECT Edition V20 Update 2 it is possible to generate the mesh via the command line using a series of property – value pairs.
The mechanisms and the general aspects developed in pseudo-static analysis are explained in this article, along with simple examples.
In PLAXIS 2D and 3D, providing that the dynamic module is available, a dynamic (i.e., time-dependent) load can be defined by assigning a dynamic multiplier to the dynamic component of a load. As detailed later, the dynamic component of a given load is independent of its static component.
With PLAXIS Output program a load-displacement curve can be generated. However, this is also possible with the help of the ΣMstage - displacement curve.
In PLAXIS 2D and 3D, a dynamic displacement can be assigned to any cartesian component of a given prescribed displacement to define its evolution with time. As detailed below, the dynamic displacement is only prescribed to the model when both static and dynamic components of displacement are activated.
In PLAXIS Input, the default behaviour is to store only the last calculation step of each phase. The option to set the Max number of steps stored can be found in Phases window, under the Numerical control parameters.
For a dynamics analysis, the user can choose several boundary conditions: Viscous, Free field, tied degrees of freedom and no specific boundary (None). With the option Tied degrees of freedom, the calculation will connect the nodes at the left and right model boundaries such that the corresponding nodes will undergo exactly the same displacements. This option may be chosen to model e.g. a one-dimensional shear column in order to perform a site response analysis.
When you open a PLAXIS model and the program tells you you do not have the proper entitlements, you can fix this!
Sometimes you want to see not only the final results of a single phase in a PLAXIS calculation, but you are also interested in the intermediate steps. Here you can see how.
With fully permeable interfaces, the cross flow results are not shown. In the article, a workaround is shown to get these discharge values.
This page lists the changes in the commands for PLAXIS 3D and its parameters per version.
In PLAXIS 2D 2017 and 3D 2017, an improvement was made in structuring the properties for Phase/Step objects in PLAXIS Output program, e.g. for Python.
Permeability in interfaces and the explanation of hydraulic properties of interfaces. New since 2D and 3D 2017.
This article shows situations and considerations when modelling semi-permeable structures like retaining walls or tunnels using semi-permeable interfaces
In PLAXIS 2D and PLAXIS 3D a pseudo-static acceleration can be defined per phase. You can define the value per phase via the Model Conditions > PseudoStatic option in the Model Explorer.
When using the combination of a Safety analysis and updated mesh, the node locations will no longer be updated during this calculation. Why is this important? Read more for some examples.
PLAXIS Output offers the possibility using the command line to configure the plot settings in order to export a plot to a file for post-processing.
Using the built-in command line options, we can create groups based on filtering criteria that enable us to see more details of our PLAXIS model. Some examples are given for 3D embedded beams.
Here we show a workaround for dealing with creep or external effect leading to overall stiffness reduction in structural elements in PLAXIS models
With the release of PLAXIS 3D CONNECT Edition V20 Update 2, the meshing procedure is enhanced with the new Swept meshing feature!
When running a PLAXIS 3D model, the most interesting behaviour and results are usually all inside the 3D soil model. In this article, we will show you ways how to see inside the soil and understand the results better.
New features in PLAXIS 2D and PLAXIS 3D Hydrodynamic pressure in dynamic analysis: Westergaard's added mass is now available!