RE: Flow only analysis and fully coupled flow deformation calculation type

Ahmad Jazzar — Thu, 29 Jul 2021 17:54:40 GMT

Thank you very much for your reply. I have attended the webinar and it was informative.

RE: Flow only analysis and fully coupled flow deformation calculation type

Stefanos Papavasileiou — Tue, 27 Jul 2021 14:22:35 GMT

Hello again,

If you are interested in joining, here is a link to our Answer Hour session today about Ground Water and Pore Pressures in PLAXIS:
communities.bentley.com/.../answer-hour---ground-water-and-pore-pressures-in-plaxis

RE: Flow only analysis and fully coupled flow deformation calculation type

Stefanos Papavasileiou — Tue, 27 Jul 2021 10:13:04 GMT

Dear Ahmad,

You are correct about the Flow only option - it allows for performing a steady-state groundwater flow and transient groundwater flow (not for Initial phase) analysis. In this case, there is no stress or deformation analysis taking place.

A plastic analysis involves a stress analysis and can include the presence of water via a phreatic or steady-state groundwater flow pore pressure calculation type.

The fully coupled flow-deformation analysis, as the name already tells us, considers the simultaneous development of deformation and pore pressures in saturated and partially saturated soils as a result of time-dependent changes in the water conditions. In principle, the results will be similar but keep in mind that the resulting deformation can have an influence on this.

Note that it is not possible to start with a Flow only and then switch to deformation analysis (including fully coupled flow-deformation). However, you can consider running a deformation analysis from the beginning and when needed include either a Plastic with steady-state groundwater flow pore pressure calculation or a fully coupled flow-deformation analysis.