BEGIN:VCALENDAR PRODID:-//eluceo/ical//2.0/EN VERSION:2.0 CALSCALE:GREGORIAN BEGIN:VEVENT UID:487517bf92cbaf533cffb1ab57a40f13 DTSTAMP:20260717T150732Z SUMMARY:Structures Seminars – Prof. James M. Ricles (Lehigh University): Seismic Resilience of Buildings with Nonlinear Viscous Dampers Using Real- Time Hybrid Simulation DESCRIPTION:Abstract:\nReal-time hybrid simulation (RTHS) is an advanced cy ber-physical simulation technique that combines physical testing with comp utational modeling to evaluate the dynamic response of structural systems subjected to extreme hazards. Components that are difficult to model accur ately are tested experimentally\, while the remainder of the structure is represented numerically. The physical and numerical substructures are coup led in real time through their interface degrees of freedom\, enabling rea listic assessment of complete structural systems and response modification devices.\nLehigh University hosts the NSF-funded Natural Hazards Engineer ing Research Infrastructure (NHERI) Lehigh Experimental Facility\, which s pecializes in large-scale\, multi-directional RTHS. This presentation high lights recent research on the seismic performance of steel buildings equip ped with nonlinear viscous dampers. Large-scale RTHS was conducted to inve stigate the coupled behavior of the damping system\, structural frame\, an d soil–foundation interaction (SFI). Performance-based design strategies \, including reduced design base shear strength permitted by ASCE 7 for st ructures with supplemental damping\, were evaluated. Neural network models were developed and integrated into the RTHS framework to accurately repre sent SFI effects\, with the primary objective of limiting structural and n onstructural damage through reduced seismic story drifts.\nThe presentatio n will introduce recent advances in RTHS methodologies developed at Lehigh and demonstrate their application through experimental studies of damped steel frame buildings subjected to strong earthquake ground motions. Parti cular emphasis will be placed on the influence of design base shear streng th on peak and residual story drifts and on the interaction between supple mental damping devices and the lateral force-resisting system.\nBio:\nJame s M. Ricles is the Bruce G. Johnston Professor of Structural Engineering i n the Department of Civil and Environmental Engineering at Lehigh Universi ty\, where he has been a faculty member since 1992. He also serves as Dire ctor of the ATLSS Engineering Research Center and the NSF-funded Natural H azards Engineering Research Infrastructure (NHERI) Lehigh Experimental Fac ility.\nDr. Ricles received his B.S. and M.S. degrees from the University of Texas at Austin and his Ph.D. from the University of California\, Berke ley. His research focuses on structural resilience\, emphasizing advanced computational frameworks and large-scale\, multi-directional real-time hyb rid simulation (RTHS) for evaluating complex structural systems subjected to extreme hazards. His research on neural network-enabled RTHS was recogn ized as one of the Top Viewed Articles of 2025 in Earthquake Engineering a nd Structural Dynamics.\nHe is a registered Professional Engineer in Calif ornia\, Editor-in-Chief of Engineering Structures\, and a member of the Ed itorial Advisory Board of Earthquake Engineering and Structural Dynamics. His honors include the NSF Presidential Young Investigator Award\, the ASC E Raymond C. Reese Research Prize\, the AISC Special Achievement Award for innovations in structural resilience\, the Lincoln Arc Welding Foundation Award for Outstanding Achievement in Arc Welded Design\, and the Engineer ing Structures 2024 Best Paper Award in Structural Analysis and Design.\nO pen to all. Attendees external to Imperial need to register by email. \nT ime: 12:00   URL:https://www.imperial.ac.uk/events/211192/structures-seminars-prof-james -ricles-lehigh-university-seismic-resilience-of-buildings-with-nonlinear-v iscous-dampers-using-real-time-hybrid-simulation/ DTSTART;TZID=Europe/London:20260708T120000 DTEND;TZID=Europe/London:20260708T130000 LOCATION:SKEM 207\, Skempton Building\, South Kensington Campus\, Imperial College London\, London\, SW7 2AZ\, United Kingdom END:VEVENT BEGIN:VTIMEZONE TZID:Europe/London BEGIN:DAYLIGHT DTSTART:20260708T120000 TZNAME:BST TZOFFSETTO:+0100 TZOFFSETFROM:+0100 END:DAYLIGHT END:VTIMEZONE END:VCALENDAR