Estimation of element‐by‐element demand‐to‐capacity ratios in instrumented SMRF buildings using measured seismic response

• Published in: Earthquake engineering & structural dynamics Vol. 47; no. 12; pp. 2561 - 2578
• Main Authors: Anil, Chopra, Hernandez, Eric, Roohi, Milad, Rosowsky, David
• Format: Journal Article
• Language: English
• Published: Bognor Regis Wiley Subscription Services, Inc 10.10.2018
• Subjects: Acceleration; Aseismic buildings; Buildings; Capacity; Computer simulation; Demand; Earthquakes; Finite element method; Instrumentation; instrumented buildings; Kalman filter; Methodology; postearthquake assessment; Ratios; response estimation; Seismic activity; Seismic response; Steel; Steel frames; Steel structures; structural health monitoring
• ISSN: 0098-8847; 1096-9845
• DOI: 10.1002/eqe.3099

Summary This paper presents a methodology to estimate element‐by‐element demand‐to‐capacity ratios in instrumented steel moment‐resisting frames subject to earthquakes. The methodology combines a finite element model and acceleration measurements at various points throughout the building to estimate time history of displacements and internal force demands in all members. The estimated demands and their uncertainty are compared with code‐based capacity from which probabilistic bounds of demand‐to‐capacity ratios are obtained. The proposed methodology is verified using a simulated six‐story building and validated using acceleration data from California Strong Motion Instrumentation Programstation 24370 during the Northridge and Sierra Madre earthquakes.