Dear Mojtaba Khalife ,

Plaxis and Flac are best tools to address your concerned problem. These are widely used softwares that are user-friendly and have vast literature available. These literature can help you a lot throughout the process.

Hope this helps.

Regards

Plaxis seems to be a better choice

Hi Dear khalifeh

Do not doubt that FLAC software is the best. You can see the power of FLAC in the articles of the last twenty years (In the field of liquefaction)

The FLAC software is very capable of Couples analysis liquefaction.

With using Constitutive models: Finn, UBCSAND, PM4SAND, CycLiq, Wang2D, NTUA-Sand, UBCHYST, Dames & Moore, Dafalias-Manzari, ............

Select Best software: FLAC 2D-3D

Best,

Rashiddel

I think bof them are them are the best software plaxis and FLAC but the FLAC is batter then plaxis.

Dear Mojtaba,

In fact, it is an interesting question. Before answering this question, I must say that it is the geotechnical characteristics of the site is dictate to using software. Software selection before site inspection is wrong.

Nevertheless, the best way to determine the liquefaction is field experiments like SPT.

As modelling, UBC3D-PLM (Plaxis) is provided good results to estimate the liquefaction. On the other hand, the Flac use the different procedure to estimate the liquefaction. The main differences between Plaxis and Flac is calculations process (FEM or FDM).

Best regards,

Plexis is better

Thank you for your response, dear ones

Plaxis.

Hi Mojtaba,

It depends on what you want to do with the software. If you want to undertake static stress deformation analysis, simulating construction stages, seepage analysis, etc, then PLAXIS is the way to go. Plaxis is black-box type of software even if you do not understand how it works, the software can still run well if you input the right properties in the input file. But if you want to seismic deformation analyses or other dynamic analysis, FLAC is more efficient in the running time, especially for large problems compared to PLAXIS. But FLAC requires more understanding on how the software works, if you want to make sure you get the right answers. Preparing the FLAC input files is still challenging, but once you get the geometry right, you can run many different cases using fish code quite easily. It is just a matter of computer running time.

I hope that helps.

flac is ok.

Hi

PLAXIS or FLAC. PLAXIS running time is less. However, I want to attract your attention the recent version of PLAXIS 2D under Bentley had some bugs when using it for seismic conditions. Hopefully Bentley fix these bugs soon. Thanks

Mohamed Elkasabgy , very interesting comment regarding the bugs, can you please elaborate?

Hi. I would say unrealistic displacement profiles when combining the vertical and horizontal seismic motions in the model. This is linked also to the type of the seismic motion (Crustal, Subduction or inslab). We informed Bentley with the bugs and they took inputs to their research team.

Sometimes, we had to vary the thickness of the firm ground to overcome this issue depending on the type of seismic motions. Hopefully this helps.

Mohamed Elkasabgy thank you.

FLAC is a powerful tool that uses the explicit time-stepping method. In this, the system doesn't need to reach equilibrium and can be analyzed and see the system's response at any time marching.

Plaxis.

FLAC is a powerful tool that uses finite difference technique by the explicit time-stepping method. In this, the system doesn't need to reach equilibrium and can be analyzed and see the system's response at any time marching