Hey everyone, I want to ask about transformation of curves from dynamic time to frequency domain in plaxis 3D because I need it to calculate impedance functions ??

Hi there, I am in the process of conducting a dynamic analysis on a deep excavation (>28m). The water table is close to the surface and the excavation wall consists of secant wall and anchors. Therefore, I am running a coupled flow analysis during…

I just doing a simulation for liquefaction on gentle relief slope with the dynamic load is 50s which consist 0.01s each data. I use PM4Sand for the constitutive model applied on the sand layer also HS Small for the clay. Currently I set the Max steps…

Hello Everyone, I know in PLAXIS , when we do an earthquake analysis we define interface boundaries along the side and bottom boundaries . IF I do the same in PLAXIS #D, should I do the same, Please advise. Thanks , Faisal

Hi there, I am applying the earthquake time history as a prescribed displacement at the base of the model. The problem I am encountering when the strong shaking starts is that the side boundaries deform too much - see below. My lower boundary is a compliant…

Hello, How does dynamic multiplier work? I read about in the manual but I see results in my analysis that don't correspond to my dynamic load set up. Let's say I set up dynamic load as qy,start,ref= - 8000lbf/ft/ft, and then I set up the Dynamic Multiplier…

How can I set up a cyclic impact of a hammer while pile loading (preferably in 2D)? I would like to see the displacement in the surrounding soil while the pile was hit 100 times (for example). Thank you

Hello All, I have a question about the hardening soil model. In PLAXIS we have HS and HSsmall for modeling soil behavior. In HSsmall, there is a parameter gamaa_07 to incorporate dynamic behavior which is not included in HS. Also, in the materials…

Good morning, Is it possible to set manually the value of the parameter h0 for the PM4Sand model? The value is computed internally with equation 2.31 of the PM4Sand model manual. Thank you in advance, Andrea Balia

Hi everyone, Currently, I am working on a dynamic model to predict the dynamic settlement and cyclic excess pore pressure under different magnitudes. In Image 1 you can see the basic model. Here, I have used the soft soil model as the soil model. In the…

Hi all, What parameters are required to be altered to change the dynamic settlement in a soft soil model?

Hello everybody I perform seismic analysis in Plaxis 2D model by using a harmonic signal (0.11 g, 1 Hz). I set horizontally fixed lateral boundaries and used absorbent boundaries in dynamic analysis (free field for boundaryX and compliant for boundaryY…

Good morning, I am wondering if the compliant base at the horizontal base of the model is capable or not to dissipate also downward waves with both horizontal and vertical direction (model with horizontal line displacement for the horizontal component…

I have a pile in a block of sand, with a horizontal load being applied at the top of the pile for 7 seconds, then being released allowing free vibration for 13 seconds. I added 1% damping to the pile and 0.6% damping to the soil materials. After this…

Dear All, Can we input p-y curves as interfaces for pile in Plaxis 3D? During time history analysis, instead of the R inter value, is there a way we can input p-y curves in the interfaces? How does one overcome this?

Good day everyone, I am modeling a water storage dam (dam composed of rockfill and a clay core) in PLAXIS 3D for which I have already generated the model, however it is difficult for me to locate the water level of the dam, which corresponds to the…

Good morning, I am trying to run a dynamic analysis and the error code 33 appears stopping the analysis at the beginning. In the model there are not embdedded beams. Probably the issue is in the creation of free-field boundaries, because if I set…

Hi, I need to perform earthquake analysis of a slope but in terms of dynamic forces, all I have is response spectra of matched time histories (see example below). I am wondering if I can use these spectra as an input in PLAXIS 2D for my analysis or…

Dear Plaxis Support When I'm using dynamic modeling, I get error on the mesh generation stage. I tried the suggested ways to fix the problem. I remodeled the model using Plaxis Designer, reducing the region size and eliminating the pichout points…

For the same model Mohr-Coulomb, HS and Hs small model is giving positive pore water pressure but the UBC3D-PLM model is giving negative results of excess pore water pressure. Is there any problem in software or I am doing something wrong.

Good evening, I have a relatively simple question. why Mohr Coulomb's constitutive model, if subjected to cyclic loads of constant amplitude repeated over time, in dynamic analyzes, produces an increase in plastic deformations? Thank you in advance

Hello Everyone! Does anybody know if its possible to view the plate forces (Bending Moment/Shear/Axial) for a chosen timestep in a dynamic analysis? At the moment I am only able to view these forces at the final step (Step 222, Time = 0.175s) of the…

Good Day Everyone I'm trying to plot a Load- Displacement curve for a Dynamic Analysis on Plaxis 2D but im not sure how to do so since the MStage Method doesnt work for Dynamic Analysis I have the Load-Time curve which I have input as a Load Multiplier…

I want to apply (input) a dynamic load of sinusoidal wave which is having a frequency of 20hz and amplitude of 5m/s2 at the base of model how can I apply that? Secondly, how can I use UBC3DPLM model for liquefaction and how can I get pre and post liquefaction…

Dear All, I hope you are all fine. I am experiencing some problems during local seismic response analysis with soil-structure interaction in Plaxis 3D (coupled approach). In particular, all materials were modeled using Hardening Soil Small Strain…