SoilQuake.net

DIANA

DIANA is a finite element package developed by DIANA FEA BV. This analytical software have been used to simulate a variety of complex problems in civil, geotechnical and earthquake engineering.

The UCSD soil models UCSDSAND3 and UCSDCLAY have been integrated into DIANA as user defined material models. These material models are capable of simulating the essential dynamic response characteristics of cohesionless and cohesive soils respectively. Additional references can be found here.

Example of 1D site response analysis which utilizes the soil models (demo version of UCSDSAND3 and full version of UCSDCLAY) is provided below (for illustration purposes). For the 3D full version of the UCSDSAND3 soil model, please contact Prof. Ahmed Elgamal (E-mail: elgamal AT ucsd DOT edu).

1D Seismic Site Response Example

Please follow the steps below to download, install, and run the DIANA_Example.

Step 1: Download and Installation

    1) If you do not have DIANA installed, please visit https://dianafea.com/ to obtain the analysis package.

    2) Download DIANA_Example.rar (Coming soon!) (10 MB, updated 8/31/2017)

    3) Unzip all files in the DIANA_Example.rar to a desired location. The zip file includes the material models (ucsdsoilmodels.dll), and an excel sheet interface (1D_Seismic_Site_Response_Example.xlsm).

    4) Please move ucsdsoilmodels.dll (contained in the above Example file) to the main folder of the DIANA installation folder.

    5) Update DIANA_location.txt with the location of the DIANA installation.

Step 2: Run 1D_Seismic_Site_Response_Example

    1) Open 1D_Seismic_Site_Response_Example.xlsm. If prompted please enable macros. This Excel sheet makes use of macros to generate input files for DIANA and run the analysis.

    2) Update the material and analysis parameters shown on the Excel sheet and then click "Create Input and Run" to start the analysis in DIANA.

    3) Upon completion of the analysis click "View Results" to load the output.

Model Performance

Below are some sample responses using the UCSD soil models. Click images to see full sized versions.

UCSDSAND3 - Saturated:
Soil Column Model in DIANA
Pore Pressure Time History
Shear Stress vs. Shear Strain
Shear Stress vs. Confinement

UCSDSAND3 - Dry:
Soil Column Model in DIANA
Shear Stress vs. Shear Strain

UCSDCLAY:
Soil Column Model in DIANA
Shear Stress vs. Shear Strain

Usage of UCSDSAND3 and UCSDCLAY

For information on how to use the soil models UCSDSAND3 and UCSDCLAY in DIANA, please click here.


DLL File of UCSD Soil Models

(Demo version of UCSDDSAND3 and full version of UCSDCLAY, updated 8/27/2019)