• Formulations used for the HSS constitutve model

    Hi all, I am trying to recreate the stress-strain curves from the HSS formulation to have a better understanding about the calibration process. I am using the following formulation as displayed in the "Material Models" manual: Nevertheless, this…

  • Post-lateral loading axial capacity of a pile

    I aim to calculate the tensile capacity of a pile after a cycle of lateral loading and unloading in Plaxis 3D. When I compare the post-lateral-loading axial capacity (Q1) with the axial capacity with no prior lateral loading (Q_ref), I observe that Q1…

  • Benchmark problem of deep excavation

    I am very glad to write this post because last time I got a benchmark problem regarding embankment consolidation problem over PVD-treated soft soil " Comparison of Drainage Line Elements in PLAXIS 2D and 3D.....". After that, I successfully published…

  • FFT in plaxis 3D

    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 ??

  • Hardening Soil Model Limitation

    Hi, PLAXIS team, I'm struggling to understand what the upper limit for material stiffness, i.e. E50 in Hardening Soil Model is? I am exploring different material models for a very low to low strength Siltstone (UCS = 1MPa, E50 = 300MPa) and I was thinking…

  • Find out the Mobilized Stiffness in Hardening Soil Model

    Hi All, Is there a way to extract the mobilized stiffness when using the Hardening Soil Model (or HSS)? I am interested in a numeric value (and not a symbol). Thanks

  • Difference between HS and HSsmall

    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…

  • Soil improvement using PVD

    I want to ask when reviewing soil improvement using PVD, why is the result of the decrease in time using my plaxis 2D when 2 m spacing is faster than 1.5 m spacing and 1.5 m spacing is faster than 1 m spacing?shouldn't pvd spaced closer should be faster…

  • floating windfarm anchor pile

    Hello, Please, i'm BELOUAD Rabah, student in M2 Geosciences of energy at Paris Cergy University. I'd like use Plaxis to design the anchor pile of floating windfarm for my master thesis but i didn't use it before, if someone could help me in this…

  • Hardening soil model for rock layers for a deep excavation project.

    We are doing independent check / PE review of an deep excavation project, which majority of the excavation are in Rocks. The designer used Hardening soil model to model the Rock layers. My questions are: 1. is it proper to use HS model to model the…

  • Stiffness modulus when using Hardening soil and Undrained B

    Hi, I am performing calculations in Plaxis 2D for a deep excavation and am using the Hardening soil model. However i want to set a clay layer to Undrained B as i dont want to overestimate the shear strength of the material. When i change it to undrained…

  • The E50 in the hardening soil model（HS）when using the "soiltest" in PLAXIS 2D is different from the input value

    Dear all, When using “Triaxial test” of the “soiltest” option together with the hardening soil model in PLAXIS 2D, input the parameters as Figure 1 and get the parameter E50 from Figure 2 according to the definition in Figure 3, then it can be found…

  • Increase of Stiffness in Hardening Soil with Undrained B

    Hi PLAXIS team, Reading from PLAXIS manual, I see the following and agree with it. "PLAXIS has options to deal with undrained behaviour in an effective stress analysis, the use of undrained shear strength (cu or Su) may be preferred over the use of…

  • Hardening Soil Model Parameters

    Dear All I have oedometer test data providing einit, Cc, Cs and also Multistage CIU triaxial data from which I have obtained c' phi'. I am utilising the hardening soil model for settlement estimates of foundation loading. My question is, do I need…

  • On the use of different constitutive models in data assimilation for slope stability

    Application PLAXIS 2D Version PLAXIS 2D Original Title On the use of different constitutive models in data assimilation for slope stability Original Author M. Mohsan, P.J. Vardon, F.C. Vossepoel Publication year 2021…

  • POP, OCR

    Hi all, Anyone please explain about the POP , why this diagram differs with OCR and in which instance use POP? Can use both OCR and POP at the same time or any conditions are there? Thanks, Nitha.

  • Correlations of stiffness with spt N value for the HS model

    Hi all, If anyone knows the stiffness correlation based on SPT N value, please share. and any correlations with stiffness also please share. Thanks.

  • Hardening soil model advanced parameters

    In PLAXIS 2D, for undrained (B) conditions, there are two parameters that are not specified in the manuals. I have to determine the parameters from just one CPT. What do the S u,inc and y ref represent? And what is their relevance in this model?

  • Eur adopted by Plaxis for analysis using Hardening soil and Hardening soil small strain models

    Hi, I was trying to model a tunnel problem using HSS, so I decided to check the Eur adopted by the program before performing the analysis. I found out that the values utilized are quite high in the initial stages of model and they are not matching with…

  • Generalized Hardening Soil Model - PLAXIS UDSM

    Application PLAXIS 2D PLAXIS 3D Version PLAXIS 2D PLAXIS 3D Date created 10 April 2015 Date modified 07 October 2020 It is observed in simulations of excavation projects using the Hardening Soil model (or HS small…

  • Triaxial test with Hardening Soil model

    Application PLAXIS 2D PLAXIS 3D Version PLAXIS 2D PLAXIS 3D Date created 07 November 2012 Date modified 07 November 2012 This document describes an example that has been used to verify the elasto-plastic deformation…

  • 2D FEM analysis compared with the in-situ deformation measurements

    Application PLAXIS 2D Version PLAXIS 2D Original Author Martin A. op de Kelder Date created 02 November 2015 Date modified 24 October 2016 Small-strain stiffness is seen as a fundamental property that almost…

  • Hardening Soil Model

    Application PLAXIS 2D PLAXIS 3D Version PLAXIS 2D PLAXIS 3D Date created 02 May 2011 Date modified 02 May 2011 The Hardening Soil model is an advanced model for the simulation of soil behaviour. As for the Mohr-Coulomb…
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