PEER, in collaboration with MTS‘s Lab Expert Seminar Series, held a two day workshop on March 20-21, 2018, focusing on a comprehensive exploration of hybrid simulation technologies and methods. The event was held at the UC Berkeley Richmond Field Station and had a great turnout with active participation of 45 attendees.
The first day of the workshop focused on quasi-static (slow) hybrid simulation. The morning session was devoted to lectures that described an overview of the methodology and fundamentals. Professor Khalid Mosalam, PEER Director and Professor at UC Berkeley, presented an overview of the past and future of the methodology, introduction to mechanical hybrid simulation, and descriptions of hybrid simulation techniques. This was followed by Dr. Shawn You (MTS), Dr. Selim Günay (PEER/UC Berkeley) and Dr. Andreas Schellenberg (Maffei Structural Engineering) presenting core aspects of the methodology, including sub-structuring, integration methods, simulation errors and geographically distributed hybrid simulation, and the implementation frameworks OpenFresco and OpenFresco Express. The workshop continued with a lunch presentation describing the current and future states of PEER activities. The afternoon session included quasi-static hybrid simulation applications and demonstrations. Four applications were presented, covering a wide range between a small component hybrid simulation and a large scale multi-directional hybrid simulation. Demonstrations led by Dr. Günay and Dr. Schellenberg started with a description of the control room and the PEER hybrid simulation system, and continued with live tests of a variety of interesting quasi-static hybrid simulation cases, including free vibration hybrid simulation, geographically distributed hybrid simulation, and local hybrid simulation conduced near collapse.
The second day of the workshop focused on real-time hybrid simulation and hybrid simulation in other industries. The morning session included an overview of the theory by Professor Mosalam, development and applications of real-time hybrid simulation in actuator and shaking table configurations and seismic testing system modeling and control techniques for real-time hybrid simulation (by Dr. Shawn Gao of MTS, Dr. Günay, and Dr. Schellenberg). In honor of Professor Steve Mahin, the lunch presentation included short talks from a few of the workshop speakers and attendees that reflected on Professor Mahin’s valuable contributions to hybrid simulation and to earthquake engineering, academia, and life in general. The afternoon session started with a live demonstration of the real-time hybrid simulation of a tuned mass damper on the PEER-UC Berkeley 6-DOF shaking table and continued with hybrid simulation applications in other domains including energy generation from ocean waves (by Thomas Boerner and Nigel Kojimoto of CalWave, and Dr. Günay), daylighting systems (by Dr. Alex Mead of PEER), adaptive façades, and fire hybrid simulation (by Dr. Martin Neuenschwander of UC Berkeley).
The workshop concluded with a one-hour Q&A session, where a panel of seven experts (Professor Mosalam, Dr. Schellenberg, Dr. Günay, Dr. Gao, Dr. You, Dr. Martin Leclerc, and Dr. Shakhzod Takhirov) addressed questions from the audience and discussed the future of hybrid simulation. Discussion included the challenges in the current state of hybrid simulation and ways to overcome them, as well as how to make hybrid simulation easily accessible to the broad engineering community including industry and academia.
The agenda is posted on the event website, and the workshop presentations and demonstrations will be made available soon.