Model-data fusion for seismic performance evaluation of an instrumented highway bridge |
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Authors: | Siddharth S. Parida Alexandros Nikellis Kallol Sett Puneet Singla |
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Affiliation: | 1. Department of Civil Engineering, Embry-Riddle Aeronautical University, Daytona Beach, FL, USA;2. Catastrophe Engineering and Analytics, Berkshire Hathaway Specialty Insurance, San Ramon, CA, USA;3. Department of Civil, Structural and Environmental Engineering, University at Buffalo, Buffalo, NY, USA;4. Department of Aerospace Engineering, The Pennsylvania State University, State College, PA, USA |
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Abstract: | The paper presents a computationally efficient algorithm to integrate a probabilistic, non-Gaussian parameter estimation approach for nonlinear finite element models with the performance-based earthquake engineering (PBEE) framework for accurate performance evaluations of instrumented civil infrastructures. The algorithm first utilizes a minimum variance framework to fuse predictions from a numerical model of a civil infrastructure with its measured behavior during a past earthquake to update the parameters of the numerical model that is, then, used for performance prediction of the civil infrastructure during future earthquakes. A nonproduct quadrature rule, based on the conjugate unscented transformation, forms an enabling tool to drive the computationally efficient model prediction, model-data fusion, and performance evaluation. The algorithm is illustrated and validated on Meloland Road overpass, a heavily instrumented highway bridge in El Centro, CA, which experienced three moderate earthquake events in the past. The benefits of integrating measurement data into the PBEE framework are highlighted by comparing damage fragilities of and annual probabilities of damages to the bridge estimated using the presented algorithm with that estimated using the conventional PBEE approach. |
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Keywords: | Bayesian model updating incremental dynamic analysis non-Gaussian nonlinear finite elements performance-based earthquake engineering stochastic collocation |
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