Uncertainty Calibration of Large-Order Models of Bridges Using Ambient Vibration Measurements

Costas Papadimitriou 1 Costas Argyris 1 Dimitra-Christina Papadioti 1 Panagiotis Panetsos 2
1 UTH - University of Thessaly [Volos]
2 Egnatia Odos
Abstract : A computational efficient Bayesian inference framework based on stochastic simulation algorithms is presented for calibrating the parameters of large-order linear finite element (FE) models of bridges. The effectiveness of stochastic simulation tools to handle large-order linear models in Bayesian analysis is demonstrated by calibrating a high fidelity FE model of the Metsovo bridge with several hundreds of thousands of DOF, using experimentally identified modal frequencies and mode shapes based on ambient vibration measurements collected from a wireless mobile measuring system. The mode shapes of the bridge are assembled using the identified modal characteristics from a number of different sensor configurations, involving reference and moving sensors, optimally placed on the bridge deck to adequately cover the whole bridge span. The identified finite element models and their uncertainties are representative of the initial structural condition of the bridge and can be further used for structural health monitoring purposes.
Keywords : Parametric identification Modal analysis Civil engineering SHM applications
Type de document :
Communication dans un congrès
Le Cam, Vincent and Mevel, Laurent and Schoefs, Franck. EWSHM - 7th European Workshop on Structural Health Monitoring, Jul 2014, Nantes, France. 2014
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Costas Papadimitriou, Costas Argyris, Dimitra-Christina Papadioti, Panagiotis Panetsos. Uncertainty Calibration of Large-Order Models of Bridges Using Ambient Vibration Measurements. Le Cam, Vincent and Mevel, Laurent and Schoefs, Franck. EWSHM - 7th European Workshop on Structural Health Monitoring, Jul 2014, Nantes, France. 2014. 〈hal-01022977〉

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