Stakeholders are demanding that the performance of the built civil infrastructure be more resilient to natural hazards in order to reduce their impact on society. Performance-based engineering is a means to attempt to meet performance objectives associated with prescribed levels of hazards. A viable technique to meet validation requirements for performance-engineered structural systems is to use real-time hybrid simulation to perform cyber-physical experiments. The complete system is involved in these simulations, where selected components of the system are modeled physically while others are modeled numerically using computational models. The modeling of the former in the physical domain is required because accurate computational models do not exist for these components. In such studies the response modification devices can be coupled to a system that is subjected to a prescribed hazard with a specific return period, enabling system performance under prescribed levels of realistic hazard demands to be established. The talk will present results from recent efforts that the presenter and his research team have completed to advance large-scale multi-directional real-time hybrid simulation. Topics of the talk include an overview of the development of model-based unconditionally stable dissipative explicit direct integration algorithms, explicit state-determination force-based fiber elements, and adaptive servo-hydraulic actuator control algorithms. The real-time integrated control IT architecture used to implement these develops will also be presented. The talk will conclude with applications of these developments to perform real-time hybrid simulations of nonlinear structural systems subjected to earthquake and wind hazards, including extensions to offshore wind turbines, aeroelastic response of tall buildings, and simulations with soil-structure interaction involving machine learning.
July 12, 2024 - 3:00pm-4:30pm
The seminar will take place in blended mode: in presence at the Aula Caveau - DISG, Faculty of Engineering, via Eudossiana 18, Rome and online via Zoom.
For the seminars supplied by the PhD Program of the DISG credits are not provided. Also certificates of attendance will not be produced for seminars.