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 UCSDSAND3BETA 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 demo versions of the soil models is provided below (for illustration purposes). For the 3D full version of the soil models, 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. For additional information, please reference the user manual.

Step 1: Download and Installation

    1) If you do not have DIANA installed, please visit to obtain the analysis package.

    2) Download DIANA_Example.rar (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.

UCSDSAND3BETA - Saturated:
Soil Column Model in DIANA
Pore Pressure Time History
Shear Stress vs. Shear Strain
Shear Stress vs. Confinement

Soil Column Model in DIANA
Shear Stress vs. Shear Strain

Soil Column Model in DIANA
Shear Stress vs. Shear Strain


For information on how to use the soil models UCSDSAND3BETA and UCSDCLAY in DIANA, please click here.