We are conducting a survey to identify problems ans shortcoming associated with OpenSees. Please help by filling out the survey. Version 2.4.4 of the OpenSees binary is now available for download. Here is the change log. The next seminar in the web-based Discovering OpenSees: Surfing the waves of OpenSees learning series will occur June 12, 2014. The webinar is titled: How to Build a Model of a Structure Faster with a Script than with a GUI The session will be broadcast twice at times that will allow users in all time zones around the world to participate. The University of Bristol, University of Washington, and PEER will be hosting a two day workshop at the University of Bristol, Bristol, U.K. on June 25 and 26 2014. Information can be found at the workshop web page. An OpenSees Days workshop will be held for the in Port, Portugal on July 3-4, 2014 at the Faculty of Engineering of the University of Porto, in Porto, Portugal. For more information, please consult the workshop web page. OpenSees is now available for use to all on NEEShub through the OpenSeesLab tool. For those of you with large models or many runs to perform, the machines on which this tool runs is very very very fast.

I have posted a YouTube video showing how to perform an OpenSees simulation using this tool. An improved version will be available soon. The OpenSees GUI applications, BuildingTcl and OS Navigator, are also available to run.

Try them out, registration and use of the machines are free!

Welcome to the website for OpenSees, a software framework for developing applications to simulate the performance of structural and geotechnical systems subjected to earthquakes.

The goal of the OpenSees development is to improve the modeling and computational simulation in earthquake engineering through open-source development.

OpenSees is under continual development, so users and developers should expect changes and updates on a regular basis. In this sense, all users are developers so it is important to register. More information on Open Source is available.

The development and application of OpenSees is sponsored by the Pacific Earthquake Engineering Research Center through the National Science Foundation engineering and education centers program.

OpenSees has been selected as the simulation component for the George E. Brown, Jr. Network for Earthquake Engineering Simulation and is being sponsored by NEEScomm . NEEScomm provides support for the ongoing maintenace of OpenSees and support to integrate OpenSees with the IT and EOT resources that NEEScomm makes available to the earthquake engineering community.

More info...