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Integration of structural health monitoring in a system performance based life-cycle bridge management framework
Published in Dan M. Frangopol, Structures and Infrastructure Systems, 2019
Nader M. Okasha, Dan M. Frangopol
For a given bridge structure, and following this framework, the first step is to build finite element (FE) models of its system and components. These models can be used for at least two purposes: To perform the life-cycle performance (reliability) analysis. Even though, performance indicators can be developed without using FE analysis (FEA), this framework takes advantage of the advances in such analysis in obtaining performance assessment with higher accuracy. More details on this point are given in the next subsection.To be used with the SHM to update the resistance parameters. Traditionally, SHM data has been used to update FE models of structures for the purpose of obtaining a FE model that captures the performance of the structure more accurately. Okasha et al. (2010) have used the finite element updating to update the parameters of the structure that are in turn used in updating the lifetime reliability of the structure.
Damage identification in bridge structures: review of available methods and case studies
Published in Australian Journal of Structural Engineering, 2023
One of the attractive approaches for evaluating the structural integrity is the finite element updating procedure which is based on vibration parameters. This non-destructive approach estimates the extent of damage and unlike acoustic or ultrasonic approaches, and it does not need any data about the damage location. Degrauwe et al. (2009) utilised the fuzzy number theory to study the errors and uncertainties in the damage detection of a cable-stayed bridge based on a finite element updating procedure. In particular, monitoring the cables’ natural frequencies was utilised to identify damage in a cable-stayed bridge. The two uncertain variables investigated in this paper were frequency and temperature. The analysis revealed that the change in frequency was related to the temperature variation between the two calculation dates. Further research is needed to determine the level of damage (Degrauwe, De Roeck, and Lombaert 2009).