2020/02/24 by Milad Roohi, Roohi, Milad, Eric M. Hernandez +3
Engineering · #FOS: Electrical engineering #Masonry and Concrete Structural Analysis #Seismic Performance and Analysis #Signal Processing (eess.SP) #Structural Health Monitoring Techniques #electronic engineering #information engineering
paper · pdf · doi:10.48550/arxiv.2002.12426
openalex publication_date 2020/02/24 · openalex created_date 2022/07/26 · openalex updated_date 2026/07/28
The authors propose a seismic monitoring framework for instrumented buildings\nthat employs dissipated energy as a feature for damage detection and\nlocalization. The proposed framework employs a nonlinear model-based state\nobserver, which combines a nonlinear finite element model of a building and\nglobal acceleration measurements to estimate the time history of seismic\nresponse at all degrees of freedom of the model. This includes displacements,\nelement forces, and plastic deformations in all structural members. The\nestimated seismic response is then used to 1) estimate inter-story drifts and\ndetermine the post-earthquake re-occupancy classification of the building based\non performance-based criteria, 2) compare the estimated demands with code-based\ncapacity and reconstruct element-by-element demand-to-capacity ratios and 3)\nreconstruct element-level normalized energy dissipation and ductility. The\noutcome of this process is employed for the performance-based monitoring,\ndamage detection, and localization in instrumented buildings. The proposed\nframework is validated using data from the Van Nuys hotel testbed; a\nseven-story reinforced concrete building instrumented by the California Strong\nMotion Instrumentation Program (Station 24386). The nonlinear state observer of\nthe building is implemented using a distributed plasticity finite element model\nand seismic response measurements during the 1992 Big Bear and 1994 Northridge\nearthquakes. The performance and damage assessment results are compared with\nthe post-earthquake damage inspection reports and photographic records. The\nresults demonstrate the accuracy and capability of the proposed framework in\nthe context of a real instrumented building that experienced significant\nlocalized structural damage.\n