Open System for Earthquake Engineering Simulation (OpenSees)

OpenSees software OpenSees is also the simulation component for the NEESit since 2004.

The Open System for Earthquake Engineering Simulation (OpenSees) is a software framework for simulating the seismic response of structural and geotechnical systems. OpenSees has been developed as the computational platform for research in performance-based earthquake engineering at the Pacific Earthquake Engineering Research Center.