OpenSees-Geotechnical

A practical toolkit for geotechnical and soil-structure interaction (SSI) finite element simulations using OpenSees TCL with Gmsh as a pre-processor. Includes a Python-based parsing pipeline that converts Gmsh meshes into ready-to-run OpenSees TCL model files.

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Overview

This project covers:

• General geotechnical and structural simulations in OpenSees TCL
• Soil-Structure Interaction (SSI) modeling, including:
  • Soil-structure interface contact elements
  • Absorbing boundary conditions (ASDs) for soil-domain truncation
• 1D/3D Soil Response Analyses (SRAs)
• Solid-fluid coupling (PIMY, PDMY materials, u-p formulation)

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Dependencies

• OpenSees (TCL interpreter)
• Gmsh (mesh generation)
• Python 3.x with:
  • gmsh Python API
  • numpy

Install Python dependencies:

pip install gmsh numpy

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Resources

• OpenSees Wiki — Main Examples
• OpenSees Wiki — Basic Examples
• OpenSees Wiki — Advanced Structural Examples
• OpenSees Wiki — Sensitivity Analysis
• soilQuake — PIMY, PDMY, solid-fluid coupling examples
• Gmsh Documentation

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Notes

Gmsh conformal meshing across shared surfaces:

SetFactory("OpenCASCADE");
// After building volumes with coincident faces:
Coherence;  // merges duplicate points/curves/surfaces
// Or use Boolean Fragments:
BooleanFragments{ Volume{1:N}; Delete; }{}

Git conflict resolution tip:

rm -rf .idea/
git pull origin master