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OpenSees,  the Open System for Earthquake Engineering Simulation (, is a general framework, written mainly in C++, to simulate the performance of structural and geotechnical systems subjected to earthquakes/loads.

Restrictions / License Information

OpenSees is an open source project (please read the Copyright and Disclaimer).

Running Instructions

Before running OpenSees, you need to write your TCL input/model. So, you need to be familiar with the way OpenSees specifies the model to simulate (see OpenSees user manual). To run OpenSees on a system check the version installed (if any), its type (serial or parallel) and the instructions of how to run it on the software page associated with the system at hand.

System Grex Bugaboo
Version 2.3.0