A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Probabilistic Time-Variant Linear Finite Element Model Updating for Nonlinear Structural Systems
This paper presents a method to update linear time-variant finite element (FE) models of civil structures experiencing nonlinear behavior due to earthquake excitation. First, the time-varying modal parameters of the structure are identified using the input–output dynamic data recorded during a damaging seismic event by employing a short-time windowing approach. Then, the identified modal parameters are used to update a linear FE model of the structure using a Bayesian approach. Global sensitivity analysis based on Sobol’ indices is employed to select the most influential parameters for the model updating stage. The evolution of the equivalent stiffness of different elements of the FE model are tracked and their estimation uncertainties are also quantified. The method is verified using numerically simulated data of a two-dimensional nonlinear FE model of a nine-story steel frame.
Probabilistic Time-Variant Linear Finite Element Model Updating for Nonlinear Structural Systems
This paper presents a method to update linear time-variant finite element (FE) models of civil structures experiencing nonlinear behavior due to earthquake excitation. First, the time-varying modal parameters of the structure are identified using the input–output dynamic data recorded during a damaging seismic event by employing a short-time windowing approach. Then, the identified modal parameters are used to update a linear FE model of the structure using a Bayesian approach. Global sensitivity analysis based on Sobol’ indices is employed to select the most influential parameters for the model updating stage. The evolution of the equivalent stiffness of different elements of the FE model are tracked and their estimation uncertainties are also quantified. The method is verified using numerically simulated data of a two-dimensional nonlinear FE model of a nine-story steel frame.
Probabilistic Time-Variant Linear Finite Element Model Updating for Nonlinear Structural Systems
Lecture Notes in Civil Engineering
Wu, Zhishen (editor) / Nagayama, Tomonori (editor) / Dang, Ji (editor) / Astroza, Rodrigo (editor) / Mizon, Felipe (author) / Birrell, Matías (author) / Abell, José (author) / Astroza, Rodrigo (author)
Experimental Vibration Analysis for Civil Engineering Structures ; Chapter: 30 ; 349-363
2022-08-24
15 pages
Article/Chapter (Book)
Electronic Resource
English
Nonlinear structural finite element model updating and uncertainty quantification [9437-41]
British Library Conference Proceedings | 2015
| Wiley | 2018
Updating Nonlinear Finite Element Models in the Time Domain
| British Library Conference Proceedings | 1999
Finite-Element Model Updating and Probabilistic Analysis of Timber-Concrete Composite Beams
| Online Contents | 2012
Finite-Element Model Updating and Probabilistic Analysis of Timber-Concrete Composite Beams
| British Library Online Contents | 2012