I am working on liquefaction analysis. Can you tell me how and on which surface, I should apply the earthquake load? Surface displacement or a surface load? The geometry is quite simple, with foundation soil 45*45*6 and dam over it of height 4.5. Moreover I want to ask when applying the prescribed displacement, i usually keep ux and uy as 1.00 m. Will it effect my result, or is it not necessary to keep it like that?
While applying surface load , what should be value of Sigma x, y and z.
The dynamic boundary conditions are viscous for x and y but the deformation boundary conditions are confusing. What should I do with that.
Kindly suggest a module from which I can get the information. Thanking in anticipation.
Dear Aamir,
From your questions, I understand that you are interested in the basics of running a seismic analysis.
In short, you can apply the signal using a surface prescribed displacement.
My first suggestion would be to follow our tutorial example: https://communities.bentley.com/products/geotech-analysis/w/plaxis-soilvision-wiki/45568/plaxis-2d-tutorial-16-free-vibration-and-earthquake-analysis-of-a-building
Then, you can continue reading more on our Wiki pages, such as the following. Note that the last two links are from webinars we have recorded in the past.
Thanks a lot for the reply. You have suggested plaxis 2d tutorials. I am working on 3d. Will it be effective
No problem, we have the same example in PLAXIS 3D, too:https://communities.bentley.com/products/geotech-analysis/w/plaxis-soilvision-wiki/45580/plaxis-3d-tutorial-09-free-vibration-and-earthquake-analysis-of-a-building
In any case, the theory and applications are the same in PLAXIS 2D and PLAXIS 3D.