关于举办James Ricles教授学术讲座的通知
讲座时间：2023年11月03日（周五）10:00
讲座地点：387-136-310（密码：1103）+爱思唯尔直播
报告题目：多灾害韧性基础设施实时混合仿真的研究进展与应用
报告人：James M. Ricles
【主讲人简介】Stakeholders are demanding that the performance of the built civil infrastructure become more resilient to natural hazards. Performance-based engineering is a means to meet performance objectives associated with prescribed hazard levels. A viable technique to meet validation requirements for performance-based engineered structural systems is to use real-time hybrid simulation to perform cyber-physical experiments. The complete system is involved in the simulation, where selected components are modeled physically while others are modeled numerically. The modeling of the former in the physical domain is required because accurate computational models do not exist for these components. Response modification devices that are difficult to numerically model can be modeled physically and coupled to a system that is subjected to a prescribed hazard, enabling the multi-hazard assessment of system performance to be accomplished. This presentation will feature recent efforts at the National Science Foundation (NSF)-sponsored Natural Hazards Engineering Research Infrastructure (NHERI) Lehigh Experimental Facility (EF) to advance large-scale multi-directional real-time hybrid simulation with the aim to use it to mitigate the effects of multi-natural hazards on infrastructure. Topics 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 talk will conclude with an application of these developments to perform wind and earthquake real-time hybrid simulations of structural systems to assess the efficacy of nonlinear viscous dampers in mitigating the effects of multi-natural hazards.
【报告摘要】Professor James Ricles works in structural engineering and mechanics with application to structural resiliency. He received his B.S and M.S degrees from the University of Texas, Austin and his PhD from the University of California, Berkeley. He has been a faculty member of the Department of Civil and Environmental Engineering at Lehigh University since 1992. Prior to joining the Lehigh University, he worked for Exxon Production Offshore Research Company and was a faculty member at the University of California, San Diego. Among his research interests is the development and implementation of computational frameworks for large-scale multi-directional real-time hybrid simulations applied to complex structural systems. He is the principal investigator and director of the NSF-sponsored NHERI Lehigh EF. James is also the Editor-in-Chief of Engineering Structures and serves on the Editorial Advisory Board for the International Journal of Earthquake Engineering and Structural Dynamics. He is the recipient of several research awards, including the NSF Presidential Young Investigators Award, Lincoln Arc Welding Chairman’s Award, the ASCE Raymond C. Reese Research Prize, and AISC Special Achievement Award.
