CEE Seminar - Performance of Dynamically Excited Structures through Optimization and Monitoring
This seminar provides an overview of two efforts directed toward assessing and improving the performance of structures conducted by researchers in the Smart Structures Technology Laboratory at the University of Illinois at Urbana-Champaign. The first focuses on topology optimization of structures subjected to random dynamic loads. Nearly all approaches to date only consider static deterministic loads. However, many of the most severe dynamic loads that civil structures must withstand are random and dynamic in nature. A general topology optimization framework is presented to accommodate directly the random dynamic nature of the excitation and the responses. The proposed framework is illustrated for seismically excited and wind excited buildings, as well as bridges subjected to random traffic loading. The results demonstrate the efficacy of this approach for efficient topology optimization of buildings subjected to stochastic dynamic loads. The second part of the seminar discusses recent advances in computer vision techniques as they apply to the problem of civil infrastructure inspection and monitoring. Inspection applications presented include identifying context such as structural components, characterizing local and global visible damage, and detecting changes from a reference image, with focus on rapid structural condition assessment of buildings and bridges after disasters. Monitoring applications discussed include static measurement of strain and displacement, as well as dynamic measurements of displacement and modal analysis. Additionally, promising areas of growth for research in the field of computer vision-based civil infrastructure inspection and monitoring. This research will ultimately lead to more effective performance of our civil infrastructure.