Probabilistic Vibration-Based Health Monitoring of Civil Structures.
Abstract: The main
objective of this study is to evaluate and improve the finite element (FE) model
updating process for applications to civil structures. The FE model updating technique
using the identified modal parameters can potentially predict the existence, location,
and severity of damage which is commonly defined as a change in the structures' physical
properties. The updated FE model... read morecan also be used for accurate response predictions
under future loading events. The focus in this dissertation is on Bayesian FE model
updating techniques and their applications to operational civil structures under
different sources of uncertainties such as modeling errors, changing environmental and
ambient conditions, and measurement noise. To this end, the Hierarchical Bayesian FE
model updating technique is developed in this study and is applied for model
calibration, damage identification, and response prediction of a pedestrian bridge. The
major difference of the proposed Hierarchical approach to the existing Bayesian model
updating techniques is its ability to explicitly consider the variability of structural
mass and stiffness due to for example changing environmental and ambient
Thesis (Ph.D.)--Tufts University, 2015.
Submitted to the Dept. of Civil Engineering.
Advisor: Babak Moaveni.
Committee: Costas Papadimitriou, Geert Lombaert, Masoud Sanayei, and Jason Rife.
Keyword: Civil engineering.read less