Problem description

The staged construction/flow condition settings (activate/deactivate soils, load values, water levels, activate/deactivate structural elements) are applied incorrectly in some phases after saving and reloading a project in 2D 2017.00. This is now fixed in PLAXIS 2D 2017.01

This problem can occur in cases that:

• at least one Safety phase exists
• the internal number of a Safety phase is lower than the internal number of its previous phase

In principle, the Safety phase and its previous/parent phase are identical. PLAXIS internally assigns a number to every created phase (Phase_x.Number). This number is not necessarily the same as the one displayed in Phases explorer window. If the internal number of a Safety phase is lower than the internal number of its previous phase, the staged construction settings are incorrectly applied to the wrong phase when loading the model. This results in a mix up of these staged construction settings.

In order to check the internal phase numbering, use this command:

tabulate Phases "Number"

This issue has no impact on Output unless you re-calculate the model.

Solution

The problem is already fixed for PLAXIS 2D 2017.01

When using PLAXIS 2D 2017.00 this workaround can be followed:

1. Delete all Safety phases
2. Execute the following command in staged construction mode:

   tabulate Phases "Number"

3. Count the number of phases being omitted by comparing them with the value for the .Number property
4. Add an equal number of dummy phases to the number corresponding to the omitted phases starting from the Initial Phase
5. Set the dummy phases to Not calculate status
6. Re-create the Safety phases

For example, in the following project eleven (11) dummy phases should be added in order to be consistent with the number of the omitted phases: