Download DEEPSOIL 7.1

DEEPSOIL

DEEPSOIL is a free, one‑dimensional seismic site response analysis software developed at the University of Illinois, widely used in earthquake engineering to model how seismic waves propagate through soil layers. The latest version (7.1, released December 2024) adds improved nonlinear analysis, pore pressure modeling, and faster workflows for large datasets.

Core Capabilities

Analysis Types
- Equivalent‑linear frequency domain analysis (quick, efficient).
- Nonlinear time domain analysis (captures soil nonlinearity, hysteresis).
- Linear analysis for simple elastic response.
- Pore pressure generation/dissipation models for liquefaction studies.
Input & Preprocessing
- Import custom or database ground motions.
- Baseline correction, filtering, Fourier amplitude spectrum, Arias/Housner intensity.
- Define soil layers by thickness, unit weight, shear wave velocity, damping ratio.
Outputs
- Acceleration time histories at multiple depths.
- Response spectra, transfer functions.
- Shear stress–strain loops.
- Excess pore pressure ratios (for nonlinear cases).
Performance
- Parallel processing capability for large models.
- Handles multi‑layer soil profiles efficiently.