Version 1
: Received: 5 March 2024 / Approved: 5 March 2024 / Online: 6 March 2024 (08:47:14 CET)
How to cite:
Poeta, A.; Micozzi, F.; Gioiella, L.; Dall'Asta, A. Influence of Knowledge Uncertainties on the Safety Assessment of Existing Post-tensioned Concrete Bridges. Preprints2024, 2024030290. https://doi.org/10.20944/preprints202403.0290.v1
Poeta, A.; Micozzi, F.; Gioiella, L.; Dall'Asta, A. Influence of Knowledge Uncertainties on the Safety Assessment of Existing Post-tensioned Concrete Bridges. Preprints 2024, 2024030290. https://doi.org/10.20944/preprints202403.0290.v1
Poeta, A.; Micozzi, F.; Gioiella, L.; Dall'Asta, A. Influence of Knowledge Uncertainties on the Safety Assessment of Existing Post-tensioned Concrete Bridges. Preprints2024, 2024030290. https://doi.org/10.20944/preprints202403.0290.v1
APA Style
Poeta, A., Micozzi, F., Gioiella, L., & Dall'Asta, A. (2024). Influence of Knowledge Uncertainties on the Safety Assessment of Existing Post-tensioned Concrete Bridges. Preprints. https://doi.org/10.20944/preprints202403.0290.v1
Chicago/Turabian Style
Poeta, A., Laura Gioiella and Andrea Dall'Asta. 2024 "Influence of Knowledge Uncertainties on the Safety Assessment of Existing Post-tensioned Concrete Bridges" Preprints. https://doi.org/10.20944/preprints202403.0290.v1
Abstract
The assessment of existing bridges constitutes a serious challenge for the researchers since their safety evaluation is a complex task due to several sources of uncertainty affecting the parameters identified in the knowledge process. In particular, a high level of uncertainties may arise in the case of prestressing systems requiring special investigation strategies and experimental technologies. The paper aims to investigate how the knowledge uncertainties influence the safety assessment of existing post-tensioned bridges. The semi-probabilistic approach is used, and uncertainties related to the knowledge process are described considering the number of tests, the confidence level assumed for the estimation of the problem parameters, and the measurement errors of in-situ tests. Results concerning a typical post-tensioned bridge are reported and the variability of the outcomes is discussed and compared with a reference case of “perfect knowledge”. The main results of the study confirm the general robustness of the semi-probabilistic Eurocodes safety format and provide an overview of dispersion due to different choices about the number of tests and confidence level. The measurement errors may lead to significant under-estimation of the computed structural capacity with respect to the reference one.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
