Events Calendar

Astani CEE Department Seminar

Speaker: Brian Phillips, Ph. D. Candidate, Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign

Talk Title: Real-Time Hybrid Simulation for Structural Performance Evaluation

Abstract: Engineers have a number of experimental testing frameworks with which to assess the behavior of structural systems under dynamic loads including quasi-static testing, shake table testing, and hybrid simulation. The tradeoffs in loading protocol make each framework attractive in different situations. Hybrid simulation, a relatively new experimental framework, combines experimental testing and numerical simulation to provide an efficient and cost-effective framework to test large, complex structures. Advances in supplemental energy dissipation devices, such as base isolation, fluid dampers, and friction devices, provide promising solutions for mitigating damage resulting from dynamic loads. The responses of these devices are rate-dependent, requiring real-time execution to obtain accurate and stable results (i.e., real-time hybrid simulation (RTHS)). In RTHS, the dynamic behavior of the loading system (i.e., actuators, controller, and computers) is directly introduced into the hybrid simulation loop. At the same time, the phenomenon of control-structure interaction (CSI) leads to a coupling of the dynamic behavior of the actuators and the structure. Both actuator dynamics and actuator coupling lead to a complex control problem. An overview of RTHS is presented along with the challenges and proposed model-based actuator control methods to assure accurate and stable experiments.

Location: Kaprielian Hall (KAP) - 209 Conference Room

Audiences: Everyone Is Invited

Contact: Evangeline Reyes