DEEPSOIL

DEEPSOIL News Archive

June 18, 2024 - DEEPSOIL v7.0.35 Released

DEEPSOIL v7.0.35 is now available as current stable version for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Update in this release include:

Resolved a bug in the deconvolution analysis of outcrop motions.

January 25, 2024 - DEEPSOIL v7.0.34 Released

DEEPSOIL v7.0.34 is now available as current stable version for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Update in this release include:

Minor updates.

August 25, 2022 - DEEPSOIL v7.0.33 Released

DEEPSOIL v7.0.33 is now available as current stable version for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Update in this release include:

Fixed a bug in the deconvolution analysis of outcrop motions.

July 28, 2022 - DEEPSOIL v7.0.32 Released

DEEPSOIL v7.0.32 is now available as current stable version for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Update in this release include:

Fixed a bug in calculating the relative velocity and displacement for time domain nonlinear analysis.

March 22, 2022 - DEEPSOIL v7.0.31 Released

DEEPSOIL v7.0.31 is now available as current stable version for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Update in this release include:

Fixed a bug in the computational core that caused the flip of relative displacement.
Fixed a bug that Zhang and Vucetic curve cannot be saved and load correctly.
Changed the term "Mobilized shear strength" to "Mobilized shear stress".
Disable the "Export to I-Soil/LS-DYNA" button for elastic bedrock.

July 15, 2021 - DEEPSOIL v7.0.30 Released

DEEPSOIL v7.0.30 is now available as current stable version for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Update in this release include:

Fixed a bug which could cause failure when loading soil profile files with user defined material model.
Updated the definition of maximum stress ratio in the manual.

March 24, 2021 - DEEPSOIL v7.0.29 Released

DEEPSOIL v7.0.29 is now available as current stable version for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Update in this release include:

Added a feature to generate the input file of shear beam model with I-soil model on LS-DYNA platform when GQH model is used.
Enabled the copy and paste options in the table for generating input files of LS-DYNA.
Added a note in analysis result page to indicate that unnormalized shear stress data can be found by clicking “Export to excel” button.

February 08, 2021 - DEEPSOIL v7.0.28 Released

DEEPSOIL v7.0.28 is now available as current stable version for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Update in this release include:

Fixed a problem that caused the saved auto-generated profiles could not be reopened.
Fixed an issue that caused the layer subdivision option can generate layers with significant large maximum frequency.
Fixed an error in the GQ/H fitting procedure for auto-generated profiles.
Fixed a problem that caused the shear strength value remain unchanged when units were converted.

November 27, 2020 - DEEPSOIL v7.0.27 Released

DEEPSOIL v7.0.27 is now available as current stable version for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Update in this release include:

Updated DEEPSOIL V7.0 user manual citation information and reference list.
Fixed a bug which caused plotting single element test results led to interface crash when the soil profile was opened by clicking file icon directly.
Fixed a bug which caused the motion plot in output excel file referred to wrong time data.
Fixed a problem which caused the plots were not shown correctly when exporting Excel files from motion tab.
Fixed an issue which caused staring animation in displacement animation tab could lead to interface crash.

March 13, 2020 - DEEPSOIL v7.0.26 Released

DEEPSOIL v7.0.26 is now available as current stable version for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Update in this release include:

Updated DEEPSOIL v7.0 user manual citation information and reference list.
Modified result time history plot labels to “Relative velocity” and “Relative displacement”.

March 13, 2020 - DEEPSOIL v7.0.25 Released

DEEPSOIL v7.0.25 is now available as current stable version for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Update in this release include:

Fixed a bug which caused installtion of DEEPSOIL v7.0.24 on new computer could not run.

March 12, 2020 - DEEPSOIL v7.0.24 Released

DEEPSOIL v7.0.24 is now released. Update in this release include:

Activated anonymous usage data collection option and agreement checkbox.

November 25, 2019 - DEEPSOIL v7.0.23 Released

DEEPSOIL v7.0.23 is now available as current stable version for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Update in this release include:

Added a vertical scroll bar to add/remove layer window.
Limited the size of the output to excel window.
Fixed the title of “Excess PWP ratio” plot in result interface.
Updated the user manual:
Modified installation instruction: “Run ‘DEEPSOIL 7 Installer.exe’ as administrator.” (Page 20 of 169)
Added: “Equation (7.1) and Equation (7.2) are problem specific and should not be used for general engineering practice.” (Page 107 of 169)

August 16, 2019 - DEEPSOIL v7.0.22 Released

DEEPSOIL v7.0.22 is now available as current stable version for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Update in this release include:

Fixed an error which caused the interface could not properly read curve fitting parameter, F, of Dobry/Matasovic Model for Sand in single element test.

August 15, 2019 - DEEPSOIL v7.0.21 Released

DEEPSOIL v7.0.21 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. This is a pre-release software and should be used primarily for testing and evaluation purpose. Version 6.1.7 remains available as the current stable release. Update in this release include:

Fixed a bug which caused adding new layers to user-defined model crashed the interface.
Fixed a bug which caused erroneous calculation of G/Gmax and Damping curves for Zhang (2005) clay model.
Enabled editing of Dmin in soil properties table view for user-defined model.
Updated the current curve to overlap the fit curve in soil profile definition page.

July 18, 2019 - DEEPSOIL v7.0.20 Released

DEEPSOIL v7.0.20 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. This is a pre-release software and should be used primarily for testing and evaluation purpose. Version 6.1.7 remains available as the current stable release. Update in this release include:

Fixed an error which caused the result page could not shift between different profiles.
Fixed a problem in unit conversion from cm/s^2 to g in “Add Input Motion” window.

April 01, 2019 - DEEPSOIL v7.0.19 Released

DEEPSOIL v7.0.19 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. This is a pre-release software and should be used primarily for testing and evaluation purpose. Version 6.1.7 remains available as the current stable release. Update in this release include:

Added USGS motion file ( .V1c and .V2c) type to “Add Input Motion” window.
Fixed a bug which caused “Export to LS-DYNA” function could not access selected motion file.

February 01, 2019 - DEEPSOIL v7.0.18 Released

DEEPSOIL v7.0.18 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. This is a pre-release software and should be used primarily for testing and evaluation purpose. Version 6.1.7 remains available as the current stable release. Update in this release include:

Fixed a bug which caused incorrect effective stress calculation when output excel for specific layers option.

Decemeber 12, 2018 - DEEPSOIL v7.0.17 Released

DEEPSOIL v7.0.17 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. This is a pre-release software and should be used primarily for testing and evaluation purpose. Version 6.1.7 remains available as the current stable release. Update in this release include:

Fixed a bug which caused that users could not paste data to profile table before defining bedrock properties.
Fixed a problem which caused abnormal profile plot when all the layer thickness data deleted

Decemeber 07, 2018 - DEEPSOIL v7.0.16 Released

DEEPSOIL v7.0.16 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. This is a pre-release software and should be used primarily for testing and evaluation purpose. Version 6.1.7 remains available as the current stable release. Update in this release include:

Fixed a bug which caused auto-generated profile to prevent non-masing rule selection in EQL analysis.
Replaced LomaGilroy motion in the motions library by its baseline corrected version.
Added “Time Domain” label to Duhamel and Newmark beta method on Response Spectrum.
Updated Timestep reduction warning message.
Disabled single element test for linear and equivalent linear analyses.
Updated the interface to automatically select MRDF-UIUC as default MRDF model when non-masing rule is selected for EQL analysis.
Enabled the “delete” function for cells in the advanced grid data table.
Changed the default max strain for damping fitting from 100% to 10%.
Added stress values to the results excel file.
Inserted motion name to the results excel file.
Added layer name and layer number for single element test page.
Added bedrock Vs on advanced soil profile plot for Elastic Half space.
Updated the advanced table in profile definition step to include shear strength as a basic parameter for soil.
Updated the advanced table in profile definition step to disable the cells and clean the values of the corresponding soil models and MRDF models when they are unselected.
Allowed users to copy the header of advanced table

October 19, 2018 - DEEPSOIL v7.0.15 Released

DEEPSOIL v7.0.15 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. This is a pre-release software and should be used primarily for testing and evaluation purpose. Version 6.1.7 remains available as the current stable release. Update in this release include:

Fixed a problem which caused drift in total displacement calculation.
Fixed an error which caused the Non-masing rule couldn't apply to MKZ model in single element test.
Fixed an issue which caused the interface would overwrite the maximum strain increment value.

September 11, 2018 - DEEPSOIL v7.0.14 Released

DEEPSOIL v7.0.14 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. This is a pre-release software and should be used primarily for testing and evaluation purpose. Version 6.1.7 remains available as the current stable release. Update in this release include:

Updated the libraries in computational core.
Fixed an error which caused crash when using "copy data" for response spectral plot in result interface.
Changed dynamic curve name "Menq (2007)" to "Menq (2003)".

August 23, 2018 - DEEPSOIL Short Course in San Diego State University (SDSU)

Title: Using DEEPSOIL: An equivalent linear and nonlinear seismic site response analysis software platform

Purpose:
This short course will introduce the latest release of DEEPSOIL (V7) for seismic site response analysis. The course will provide attendees with a background on SRA and the development of the DEEPSOIL platform. It will cover the various modules available including motion processing, equivalent linear analysis, nonlinear analysis with and without pore water pressure generation. The course will also include a number of hands-on exercises to gain familiarity with the development of model input and evaluation of analysis results.

For more information regrading the program and registration, please click here.

June 29, 2018 - DEEPSOIL v7.0.13 Released

DEEPSOIL v7.0.13 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. This is a pre-release software and should be used primarily for testing and evaluation purpose. Version 6.1.7 remains available as the current stable release. Update in this release include:

Fixed an issue which caused the interface load incorrect parameter names for Andrus (2013) reference curve.
Fixed an error which caused the interface could not correctly track the change of soil model on first page.
Corrected an error which could automatically update the parameter values for Andrus (2013) reference curve.
Added a message window to remind users to assign reference curves for mean profile before auto-generation/randomization.

April 20, 2018 - DEEPSOIL v7.0.12 Released

DEEPSOIL v7.0.12 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. This is a pre-release software and should be used primarily for testing and evaluation purpose. Version 6.1.7 remains available as the current stable release. Update in this release include:

Fixed an error which caused the parameters (Ref Strain and gamma1) of Yee et al. (2013) to be loaded incorrectly.
Fixed an error, which in a saved profile, caused incorrect soil model flag display in Step 1, without impacting the model used in the analysis.
Added Housner Intensity to analysis result excel.

April 16, 2018 - DEEPSOIL v7.0.11 Released

DEEPSOIL v7.0.11 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. This is a pre-release software and should be used primarily for testing and evaluation purpose. Version 6.1.7 remains available as the current stable release. Update in this release include:

Corrected an error which caused output Housner Intensity data as Arias Intensity in Motion Excel output.
Added Housner Intensity to Motion Excel output.

April 2, 2018 - DEEPSOIL v7.0.10 Released

DEEPSOIL v7.0.10 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. This is a pre-release software and should be used primarily for testing and evaluation purpose. Version 6.1.7 remains available as the current stable release. Update in this release include:

Enabled deconvolution analysis.

March 16, 2018 - DEEPSOIL v7.0.9 Released

DEEPSOIL v7.0.9 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. This is a pre-release software and should be used primarily for testing and evaluation purpose. Version 6.1.7 remains available as the current stable release. Update in this release include:

Fixed an error of pasting by shortcut key combination "Ctrl + V".
Fixed an error in expanding advanced profile table with PWP parameters.
Corrected the title of “Fourier Amplitude Ratio” in results excel.
Corrected reference curve name from “Seed and Idriss (1991)” to “Seed and Idriss (1970)”.

March 12, 2018 - DEEPSOIL v7.0.8 Released

DEEPSOIL v7.0.8 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. This is a pre-release software and should be used primarily for testing and evaluation purpose. Version 6.1.7 remains available as the current stable release. Update in this release include:

Fixed an error which caused the excel sheet name looks duplicate.
Fixed an error which caused the fitting range of damping curve didn’t plot correctly.
Fixed an error which caused the profile data grid pasting function doesn’t work for auto-generation option.
Fixed an error in page navigation function for dynamic curve randomization.
Fixed an error in dynamic curve randomization interlayer correlation.
Fixed an error in the standard deviation boundary plots.

Februry 3, 2018 - DEEPSOIL v7.0.7 Released

DEEPSOIL v7.0.7 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. This is a pre-release software and should be used primarily for testing and evaluation purpose. Version 6.1.7 remains available as the current stable release. Update in this release include:

Updated user manual, examples and default working directory.
Fixed an issue which caused the interface wrote incorrect input motion data to Excel.
Corrected an error which caused the interface couldn’t recognize the parameter for reference curve “Zhang(2005)”.
Corrected an error which caused interface crashed when removing empty layers.
Added line number to motion importer and updated the motion import procedure.
Corrected an error which caused interface crash when going back from randomized profile page to mean profile due to unsaved strength data.
Added a message box to remind user to make sure the profile document is in using or broken when the interface is trying to open it.
Added a function to save dynamic curve randomization settings.
Added a function to save randomized dynamic curve data.
Added a function to load the saved randomized dynamic curve data.
Updated copy and paste feature in advanced soil profile data grid to prevent it from modifying the data if the parameter is disabled for a given soil model.
Added copy boundary date function to Animation displacement chart.
Added an option to enable user to load motion to user defined directory.
Added a button on motion view page to load new motion directly.
Added a button on motion view page to delete unwanted motion.
Put “Process” buttons in “Motion Metrics and Tools” tab in center of each columns.

November 16, 2017 - DEEPSOIL v7.0.5 Released

DEEPSOIL v7.0.6 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. This is a pre-release software and should be used primarily for testing and evaluation purpose. Version 6.1.7 remains available as the current stable release. Please install VC++ 2015 runtime library on your system to prevent unexpected crash. Update in this release include:

Corrected an error which caused the unit shifting function didn’t work in motion input tab.
Corrected an error which caused retrieving the user specified output layers results failed.
Fixed an issue which caused calling message window from a secondary thread could crash the interface.
Fixed an error which caused export discontinuous layers output to excel file failed.
Added a message window to remind user install VC++ 2015 runtime library.
Corrected an error which caused read/write on an unauthorized path in user’s system crash the interface.
Modified the checking, loading and updating procedure of MRDF model while loading a saved profile.
Fixed an error which caused incorrectly loading of MRDF model for linear layer in a mixed profile.
Fixed an error which caused the loaded mixed soil models overwritten by the default soil model.
Fixed an error which caused blurring the Mainwindow background failed when showing a message window in results interface.
Fixed an error which caused redundant trials to read an empty output database.
Fixed an error which caused the auto-generation function didn’t work for EQL with Discrete point model.
Enabled the showing of Dmin for EQL analysis with Discrete points model.
Corrected the loading of saved EQL analysis with Discrete points analysis.
Updated Italian library.

November 16, 2017 - DEEPSOIL v7.0.5 Released

DEEPSOIL v7.0.5 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. This is a pre-release software and should be used primarily for testing and evaluation purpose. Version 6.1.7 remains available as the current stable release. Please install VC++ 2015 runtime library on your system to prevent unexpected crash. Update in this release include:

Debugged a text color assignment error which caused the "Analysis Method" items unreadable.
Corrected an error which caused baseline window couldn't open in single thread mode.
Enabled the pasting option of data grid for "Basic parameter table", “varying velocity table” and “varying strength table” .
Removed redundant zeros in bedrock input parameters (limited to 2 decimals).
Plotted both fitted soil model and reference curves when reviewing the result of auto generation.
Updated the manual in main menu.
Removed redundant layer block labels after going back from auto-generated profiles to mean profiles.
Fixed a bug which caused that “Use Reference Points” couldn’t work for Clay tab.
Enabled the fitting procedure of “user defined points”.
Updated the mean profile saving routine from dp to dpz file.
Updated the saving and reviewing routine of auto-generation
Enabled saving function of varying velocity and strength.
Corrected an error which caused that the mean soil profile click event couldn’t load the correct layer page after going back from auto-generated soil profiles view.
Corrected an error which caused that the checking of varying velocity and strength data failed when reviewing the mean profile data.
Corrected an error which caused that the loading saved profiles couldn’t recognize if realizations had been generated.
Corrected an error which caused restoring previous mean profile data failed.
Corrected an error which caused the row number of the varying velocity and varying strength table couldn’t be updated in loading saved mean profile.
Corrected an error which caused that the “Toggle Axis Type” function didn’t work in single motion view
Fixed an error which caused updating water table couldn’t update the effective stress
Enabled pasting option of user defined reference curve table
Enabled pasting option of EQL discrete points table

October 26, 2017 - DEEPSOIL v7.0.4 Released

DEEPSOIL v7.0.4 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. This is a pre-release software and should be used primarily for testing and evaluation purpose. Version 6.1.7 remains available as the current stable release. Update in this release include:

Provided an option to copy the data of dynamic curves.
Added fitting range and target shear strength to GQ/H fitting plots.
Added an option to move to layer page quickly by double-clicking a cell in advanced table or clicking layer block on soil columns.
Added an option to customize the profile directories.
Labeled the layer blocks in soil column.
Enabled the click event on layer block label.
Corrected an error which caused the interface crashing by exporting motion to an opened excel.
Corrected an error which caused the interface crashing by motion scaling function.
Added a check to the format of imported txt file.
Fixed the function of “Soil profile plot button” while raw data is expanded.
Changed “Peak Spectral Acceleration” title to “5% Damped Spectral Acceleration”.
Changed “Bed Rock” label to “Bedrock”.

October 16, 2017 - DEEPSOIL v7.0.3 Released

DEEPSOIL v7.0.3 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. This is a pre-release software and should be used primarily for testing and evaluation purpose. Version 6.1.7 remains available as the current stable release. Update in this release include:

Corrected an error that caused output period data in excel as frequency data.
Corrected the RS and FAS plots in time step reduction window.
Corrected an error that caused the loaded profile couldn’t be modified correctly.
Corrected an error which caused the unit system at the beginning of analysis failed to update according to default settings.
Corrected an error that caused the unit in input summary window couldn’t be updated to current unit.
Corrected an error that caused the single element test window crash before completing input of strain path.
Limited the number of random realizations for site profiles to 1000.
Disabled Number of iteration and Effective Shear Stress Definition if equivalent-linear analysis is not selected.
Disabled the zooming function of soil profile when no layers defined.
Added data check in case non-numerical input to Kappa estimator.
Enabled the smoothed FAS plot in Kappa estimator.
Added a label on the bedrock grey block on profile definition page.
Added a check after changing the MRDF.
Updated the button label “Step 2a” to “Step 2”.
Updated the Italian language library.

October 1, 2017 - DEEPSOIL v7.0 BETA Released for Public Testing

The DEEPSOIL development team is pleased to announce the beta release of DEEPSOIL 7.0. Please login here and download the updated installer. This is a pre-release software and should be used primarily for testing and evaluation purpose. Version 6.1.7 remains available as the current stable release. This new version overhauls the program workflow and adds new capabilities. The main updates in version 7.0 include:

Automatic subdivision of input soil profile is now enabled to achieve proper discretization based on maximum target propagated frequency.
Ability to perform layer thickness, shear wave velocity and dynamic curve randomizations for soil profile.
Output is provided in relational database format, which allows a user to retrieve large data sets efficiently.
Overhauled user interface.
Multiple user language selection.
Simultaneously view/plot of multiple motions.

February 1, 2017 - DEEPSOIL v6.1.7 Released

DEEPSOIL v6.1.7 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

Corrected an error that truncated discrete point data when saving a material to the material library.
Corrected an error that caused the program to crash when saving parameters after curve fitting for DS-EL3 models.
Corrected a bug that caused incorrect porewater pressure calculations when 3 or more consecutive calculations were made at the same strain in a single layer.
Corrected a bug that could cause theta4 or theta5 to be parsed incorrectly.

October 24, 2016 - DEEPSOIL v6.1.6 Released

DEEPSOIL v6.1.6 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

Added support for importing motions from fixed-width text files.
Corrected an error in the implementation of the Park and Ahn (2013) porewater pressure model.
Corrected an error in the calculation of transfer functions for the last layer of frequency domain profiles with rigid bases.

June 28, 2016 - DEEPSOIL v6.1.5 Released

DEEPSOIL v6.1.5 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

Added support for the Amir-Faryar et al. (2016) dynamic properties curves.
Corrected an error that caused deconvolution to fail when selecting multiple layers for output.
Corrected an error that caused multiple input motions to be unselected when double-clicking in the input motion selection box on step 3.
Faster generation of input files for batch analyses.

April 8, 2016 - DEEPSOIL v6.1.4 Released

DEEPSOIL v6.1.4 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

The site class conversion tool has been removed.
Added a tool to the motion processor and results viewer to estimate the high-frequency attenuation parameter Kappa from the Fourier amplitude spectrum – see the user manual for more information.
The deconvolution routine has been updated to allow for additional options including producing motions throughout the profile and specification of output motion type (within or outcrop).
Corrected an error that prevented single element tests with porewater pressure generation.
Corrected an error that prevented plotting of the linear analysis results on step 4 of time domain analyses when only one input motion was selected.

February 11, 2016 - DEEPSOIL v6.1.3 Released

DEEPSOIL v6.1.3 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

Corrected the order of the Fourier spectrum columns on the Input Motion tab of Excel output files.
Corrected an error that caused the effective stress profile in the results text file to be provided in psf for analyses using metric units.

January 18, 2016 - DEEPSOIL v6.1.2 Released

DEEPSOIL v6.1.2 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

Corrected an error that prevented users from enter negative values for the parameters of the Matasovic and Vucetic pore pressure model.
Corrected an error that allowed multiple instances of the About and License windows.

January 13, 2016 - DEEPSOIL v6.1.1 Released

DEEPSOIL v6.1.1 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

Corrected an error that caused the “Use Points” button on the layer properties window to incorrectly report that the reference curve section was incomplete when using Andrus (2003) reference curves.
Corrected an error that caused DEEPSOIL to crash when using a saved profile with layer names that contain commas.
Corrected an error that caused the smoothed FAS and smoothed FAS ratio to be calculated incorrectly when viewing analysis output.
Corrected an error that allowed multiple instances of the Options window.

November 2, 2015 - DEEPSOIL v6.1 Released

DEEPSOIL v6.1 is now available for download. This build includes the GQ/H nonlinear soil model and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

The GQ/H nonlinear soil model has been implemented - see Appendix C of the updated user manual for model description.
The baseline correction window now includes the option to overlay the original motion on the corrected motion and provides time offset information.
Updates to the user manual.

October 20, 2015 - DEEPSOIL v6.0.9 Released

An updated version of DEEPSOIL v6.0 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

Corrected an error that could cause the Fourier Amplitude Ratio plots to fail when viewing analysis output.
DEEPSOIL has been updated to use version 4.5.2 of the .NET framework. If .NET 4.5.2 has not already been installed on your system, it can be downloaded from Microsoft here.

September 24, 2015 - DEEPSOIL v6.0.8 Released

An updated version of DEEPSOIL v6.0 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

Corrected an error that caused the “Check Convergence” window to plot the strain profile incorrectly for deconvolution analyses.
Updates to the draft user manual.

August 27, 2015 - DEEPSOIL v6.0.7 Released

An updated version of DEEPSOIL v6.0 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

Corrected an error that cause porewater pressure generation to fail in single-element tests in 32-bit installations.
Corrected an error that caused dissipation to be underestimated in profiles using metric units.
Corrected an error that caused the “Missing Data…” window to appear in step 2 when using a saved profile that included the Berrill and Davis (1985) or Park and Ahn (2013) models.
Increased numeric stability of the Park and Ahn (2013) porewater pressure model calculation routine.
Corrected an error that could cause the strain-controlled test window to open with the wrong units.
Corrected an error that caused the top of rock output from equivalent linear analyses to represent the top of rock at a rigid halfspace even if an elastic halfspace was used in the analysis. This was a post-processing error and did not affect the analysis results.
Optimizations in the computational core.

August 7, 2015 - DEEPSOIL v6.0.6 Released

An updated version of DEEPSOIL v6.0 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

Corrected an error in Excel output which caused the porewater pressure headers to be in the wrong column on the Profile sheet.
Corrected an error that could cause batch analyses to fail unexpectedly and report the “Input past end of file” or “File is in use by another process” error messages.
Corrected an error that caused single-element tests with porewater pressure generation to fail.
Added support for the Park and Ahn (2013) porewater pressure model.
Added support for a modified version of the Berrill and Davis (1985) porewater pressure model.
The X-axis of the modulus reduction and damping curve plots on the layer properties form can now be switched between linear and log scales by double-clicking the plots.
Multi-threading optimizations in the motion processor calculation routines.
Optimizations in the computational core.

July 9, 2015 - DEEPSOIL v6.0.5 Released

An updated version of DEEPSOIL v6.0 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

Corrected an error in Excel output which reported the Arias Intensity in ft/s regardless of unit selection.
Improved the reliability of unit conversion of saved profiles.
Added the option to specify the coefficient of consolidation (Cv) for the halfspace when running an analysis with porewater pressure generation and dissipation.
Added support for the Andrus (2003) formulation of modulus reduction and damping curves in the reference curve section of the layer properties window.
The motion viewer can now display the “Significant Duration” (5%-95% Arias Intensity) of a ground motion.
Updates to the draft user manual.

June 18, 2015 - DEEPSOIL v6.0.4 Released

An updated version of DEEPSOIL v6.0 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

Improved the accuracy of hysteretic behavior for MRDF analyses.
The output text file now contains the build number (version) of DEEPSOIL used to conduct the analysis.
The layer properties window will no longer present the curve fitting options for equivalent linear analyses conducted with discrete points.
Corrected an error in which the time-step corrected response spectra in the motion processor may show differences with the frequency domain response spectrum.
Relative displacements are now taken relative to the top of rock motion for analyses with an elastic halfspace.

June 10, 2015 - DEEPSOIL v6.0.3 Released

An updated version of DEEPSOIL v6.0 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

Improved the reliability of intersection detection for MRDF and effective stress analyses to better handle corner cases.
Added the time history interpolation type to the input summary window.
Updated labels on the output time history plots to clarify what type of velocity and displacement time histories are being displayed.
Changes to velocity and displacement data output:
-DEEPSOIL will now produce both total and relative velocity and displacement time histories.
-Relative displacements in time domain analyses are calculated during analysis using the Newmark Beta Method.
-Relative displacements in frequency domain analyses are calculated by double integrating the relative acceleration time history.
-The outputs shown at the end of an analysis are total acceleration, relative velocity, and relative displacements – all relative values are given relative to the base of the profile (i.e. the input motion).
-The displacement column animation displays relative displacements only.
-The velocity and displacement output files have been renamed to better convey what data they contain: vel.txt and disp.txt contain total velocities and displacements, vel_rel.txt and disp_rel.txt contain relative velocities and displacements.

May 28, 2015 - DEEPSOIL v6.0.2 Released

An updated version of DEEPSOIL v6.0 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

Corrected an error that caused the pore pressure degradation parameters to be updated incorrectly.
Corrected an error that caused the program to crash on step 3 if the user double-clicked the spectral plots outside of the plot area.
Excel output files now contain an additional tab that includes the acceleration time history, response spectrum, and Fourier amplitude spectrum of the input motion used in the analysis.

May 11, 2015 - DEEPSOIL v6.0.1 Released

An updated version of DEEPSOIL v6.0 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

Corrected an error that prevented changing the color of the tripartite plot on step 3.
Improved reliability of converting PEER formatted motions (.AT2) to DEEPSOIL format.
Updated the frequency-independent viscous damping formulation to use a more-efficient Eigen decomposition algorithm.
Improved the accuracy of frequency domain response spectrum and Fourier amplitude spectrum calculations for short duration motions.
Corrected the calculation of porewater pressure using the GMP model.
Corrected an error in the porewater pressure dissipation model that only allowed for downward drainage.

April 13, 2015 - DEEPSOIL v6.0 Released

The DEEPSOIL development team is proud to announce the release of DEEPSOIL v6.0. Please login here and download the updated installer. DEEPSOIL 6 is the biggest update of the software since its original publication in 1998. DEEPSOIL 6 includes a completely rewritten computational core that 10-100x faster for most analyses. This release also includes significant updates to the user interface and adds many new features. The main updates in version 6 are:

Completely rewritten computational core.
Strain-controlled (single-element) tests can now be conducted.
DEEPSOIL will now scale beyond 4 cores when analyzing a profile with multiple motions.
Completely rewritten motion processor and baseline correction routines.
Optimized curve fitting routines.
New analysis workflow – more logical progression through definition of input data.
Automated generation of equivalent linear results with any nonlinear analysis.
Completely redesigned output viewer.
Tripartite plots are now available when viewing motions.
Graphical output from multi-motion analyses is now available.
Added the ability to export report-quality plots of input and output data.

March 9, 2015 - DEEPSOIL v6.0 BETA Updated

The DEEPSOIL development team is proud to announce the fourth public beta release of DEEPSOIL 6.0 for testing. Please login here and download the updated installer. This is pre-release software and should be used for testing and evaluation purposes only. Version 5.1 remains available as the current stable release. The updates in beta 4 include:

Corrected an error that caused step 3 to show errors when first loading.
Optimized the generation of tables in the motion processor.
Corrected an error that cause the motion processor to repeatedly process motion files after saving the current motion.
The response spectra summary plot can now cycle between axis views: semilog-x, log-log, and linear-linear by double-clicking on the plots.

February 26, 2015 - DEEPSOIL v6.0 BETA Updated

The DEEPSOIL development team is proud to announce the third public beta release of DEEPSOIL 6.0 for testing. Please login here and download the updated installer. This is pre-release software and should be used for testing and evaluation purposes only. Version 5.1 remains available as the current stable release. The updates in beta 3 include:

The motion viewer now provides the following motion metrics at the bottom of the window: timestep, Nyquest frequency, number of points, PGA, PGV, and PGD.
Corrected the velocity and displacement units on the baseline correction window.
Corrected an error that could cause the response spectra summary window to fail to load.
Added the ability to copy (by right-clicking and selecting Copy on the context menu) many more plots throughout the interface.
Corrected plotting error on step 2a that occurred when creating new profiles in terms of shear modulus.
Corrected an error that caused analyses without a water table to output normalized stress ratios that were incorrect.
Tripartite plots will now be restricted in width to keep diagonal axes at 45° when space allows.
Tripartite plots have been added to step 3 (motion selection).
Corrected an error that caused some analysis windows to scale incorrectly.

February 10, 2015 - DEEPSOIL v6.0 BETA Updated

The DEEPSOIL development team is proud to announce the third public beta release of DEEPSOIL 6.0 for testing. Please login here and download the updated installer. This is pre-release software and should be used for testing and evaluation purposes only. Version 5.1 remains available as the current stable release. The updates in beta 2 include:

The main window now includes a slider that allows the user to resize the docked controls at the left of the screen.
The strain path data table on the single-element test window now allows for pasting of data for the ending strains and number of increments using Control+V.
Corrected an error that caused DEEPSOIL Beta to be listed as DEEPSOIL Alpha in the task manager.
Corrected an error that caused DEEPSOIL to crash when importing motions in ft/s² or m/s².
Plots copied from DEEPSOIL are now provided in the vectorized Enhanced Metafile (.emf) format, allowing for better clarity when resizing the images.
Tripartite plots can now be viewed in the motion processor and on the response spectra summary output window.
Corrected several typos in the user interface text.
Revisions to the DRAFT user manual.

January 26, 2015 - DEEPSOIL v6.0 BETA Released for Public Testing

The DEEPSOIL development team is proud to announce the third public beta release of DEEPSOIL 6.0 for testing. Version 6 is a complete rewrite of the computational code for all analyses. The interface has also received numerous usability enhancements and introduces a new analysis workflow. Please login here and download the updated installer. This is pre-release software and should be used for testing and evaluation purposes only. Version 5.1 remains available as the current stable release. The main updates in version 6 include:

Completely rewritten computational core that is approximately 1 order of magnitude faster than previous DEEPSOIL releases (computational time reduced by a factor of 10 or more).
Significant updates to many of the analysis windows.
The number of concurrent analyses in batch mode is no longer limited to 4 if the hardware supports additional threads (see Options menu to set the maximum).
Users can now conduct single-element tests to model hysteretic behavior along a user-defined strain path.
Added the option to run an equivalent linear analysis when running a nonlinear analysis without requiring any change to an existing nonlinear profile.
The deconvolution routine has been rewritten and is available as part of frequency domain linear and equivalent linear analyses.
Added the ability to conduct timestep reductions of input motions using zero-padding in the frequency domain.
Added the option to use zero-padded frequency domain interpolation for calculation of acceleration increments during time domain analyses (new default behavior).
Completely rewritten motion processor and baseline correction routines.
Completely rewritten input motion converter to allow for conversion of non-PEER motion files to DEEPSOIL format.
Added support for the Roblee and Chiou (2004) dynamic properties curves as reference curves in the “Dynamic Properties” window.
Added the ability to view results from batch analyses.

May 20, 2014 - DEEPSOIL v5.1 Updated

An updated version of DEEPSOIL v5.1 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

Corrected an error that caused saved profiles to load incorrectly when opening time-domain analyses with extended Rayleigh damping (4 frequencies/modes).
Corrected an error that prevented saved profiles from opening if the file extension was capitalized.
Corrected an error that caused DEEPSOIL to crash during post-processing when using motions with a capitalized file extensions.
Corrected an error that could cause DEEPSOIL upgrades to fail upon installation.
Added the ability to copy data tables on the maximum frequency check and implied strength check forms via keyboard (Control+A to select all, Control+C to copy selection) and mouse (right click).
Replaced the dynamic properties form with a new, scalable version.
Miscellaneous bug fixes and optimizations.

January 14, 2014 - DEEPSOIL v5.1 Updated

An updated version of DEEPSOIL v5.1 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

Corrected an error that caused saved profiles to load incorrectly when opening for batch mode analyses.
Corrected an error that caused Excel file output to fail with Excel 2013.
Corrected an error that allowed the user to specify more than 4 cores be used for parallel batch mode analyses.
Added the option to specify what type of analysis to begin when opening a saved profile using the “File > Open…” command.
Miscellaneous bug fixes and optimizations.

September 14, 2013 - DEEPSOIL v5.1 Updated

An updated version of DEEPSOIL v5.1 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

Corrected an error in the calculation of nonlinear soil properties when using the Menq formulation.
Corrected an error in which 64-bit systems were limited to 2^16 motion points when running frequency domain analyses.
Miscellaneous bug fixes and optimizations.

June 15, 2013 - DEEPSOIL v5.1 Updated

An updated version of DEEPSOIL v5.1 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

Improved reliability when opening saved profiles with the Darendeli damping formulation.
Instances of Excel are now closed properly during batch analyses.
Corrected an error that displayed unnecessary controls on the layer properties form for time-domain linear analyses.
Added the ability to export result plots and plot data using a new context menu, accessed by right-clicking on a plot.
Standardized format of timesteps in output files to provide 4 decimal places.
Added a prompt to save a profile before running an analysis if the profile is unsaved or modified.
Miscellaneous bug fixes and optimizations.

February 18, 2013 - DEEPSOIL v5.1 Updated

An updated version of DEEPSOIL v5.1 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

Improved reliability when opening saved profiles.
Fourier amplitude spectra are now plotted during baseline correction of input motions.
Added support for black and white printing of output plots.
Miscellaneous bug fixes and optimizations.

October 14, 2012 - DEEPSOIL v5.1 Released

DEEPSOIL v5.1 is now available for download. This build is a maintenance build and is recommended for all users. Please login here and download the updated installer. Updates in this release include:

DEEPSOIL no longer requires administrator privileges to work properly.
Corrected several bugs related to entering profiles for deconvolution.
User files are now stored in the Documents folder instead of the DEEPSOIL installation directory.
Multi-core batch mode is enabled by default on systems with 2 or more CPU cores.
Miscellaneous bug fixes and optimizations.

November 29, 2011 - DEEPSOIL on LinkedIn

DEEPSOIL has gone social! Be sure to check out the LinkedIn buttons at the top of the page. We encourage all of our users to join our LinkedIn group and would appreciate your help spreading the word about DEEPSOIL using the share button.

November 9, 2011 - DEEPSOIL v5.0.0 Released

DEEPSOIL v5.0 is now available for download. This build is recommended for all users. Please login here and download the updated installer. Updates in this release include:

DEEPSOIL is now offered in a 64-bit compatible version.
The DEEPSOIL user interface has been updated using the latest .NET components (.NET 4.0).
DEEPSOIL will now display the progress of an analysis within the interface (all platforms) and in the taskbar (Windows7 only).
DEEPSOIL will now prevent the system from “sleeping” while an analysis is running.
The motion library has been improved. It now includes the acceleration, velocity, and displacement time histories, the response spectrum and the Fourier amplitude spectrum.
The library can also scale input motions to a desired acceleration or by a chosen scale factor.
The computational core has been optimized for Windows7.
DEEPSOIL can now calculate the response spectrum using three methods: Newmark Method, Duhamel Integral, and Frequency Domain (default). This is set during each analysis on step 4.
Baseline correction, site-class conversion, and curve fitting code has been rewritten and optimized.
DEEPSOIL is now associated with .dp files. Profiles can now be opened from Windows Explorer, allowing a profile to be opened without needing to open DEEPSOIL first.
DEEPSOIL now calculates and displays the implied strength profile based on the soil properties entered in step 2.
New input motions have been included. All motions are taken from the PEER Strong Motion Database. Metadata for these motions can be found at the end of the manual.
Corrected vertical stress calculation for layers above the water table during post-processing.

Initial development work supported primarily by the Earthquake Engineering Research Centers Program of the National Science Foundation under Award Number EEC-9701785; the Mid-America Earthquake Center.
This support is gratefully acknowledged.

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